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I am an [[astronomy]] '''volunteer''' and I am a co-author of multiple publications. My research area involves [[Brown dwarf|brown dwarfs]], [[:Category:White dwarfs|white dwarfs]], [[:Category:Debris disks|debris disks]] and occasionally [[galaxies]]. I like to listen to J-pop and I am a fan of Yamamoto Sayaka.
I was an [[w:astronomy|astronomy]] '''volunteer''' and I am a co-author of multiple publications. My research area involved [[w:brown dwarf|brown dwarfs]], infrared [[w:Time-domain astronomy|transient events]], debris around [[w:white dwarf|white dwarfs]] and occasionally active [[w:Supermassive black hole|supermassive black holes]].


== Community Science ==
==Community Science==
In 2018 to 2021 I was doing volunteer work for various projects on [[w:Zooniverse|Zooniverse]]. I began with the project Higgs Hunters, but then I became more focused on astronomy and became a moderator for [[w:the Milky Way Project|the Milky Way Project]].<ref>{{Cite journal |last=Jayasinghe |first=Tharindu |last2=Dixon |first2=Don |last3=Povich |first3=Matthew S. |last4=Binder |first4=Breanna |last5=Velasco |first5=Jose |last6=Lepore |first6=Denise M. |last7=Xu |first7=Duo |last8=Offner |first8=Stella |last9=Kobulnicky |first9=Henry A. |last10=Anderson |first10=Loren D. |last11=Kendrew |first11=Sarah |last12=Simpson |first12=Robert J. |date=2019-09-01 |title=The Milky Way Project second data release: bubbles and bow shocks |url=https://ui.adsabs.harvard.edu/abs/2019MNRAS.488.1141J |journal=Monthly Notices of the Royal Astronomical Society |volume=488 |pages=1141–1165 |doi=10.1093/mnras/stz1738 |issn=0035-8711}}</ref> I then made my first discoveries, most notably I did co-discover the [[w:infrared|infrared]] excess around the white dwarf star [[w:LSPM J0207+3331|LSPM J0207+3331]].<ref>{{Cite journal|last=Debes|first=John H.|last2=Thévenot|first2=Melina|last3=Kuchner|first3=Marc|last4=Burgasser|first4=Adam|last5=Schneider|first5=Adam|last6=Meisner|first6=Aaron|last7=Gagné|first7=Jonathan|last8=Faherty|first8=Jaqueline K.|last9=Rees|first9=Jon M.|last10=Allen|first10=Michaela|last11=Caselden|first11=Dan|date=2019-02-19|title=A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project|url=http://arxiv.org/abs/1902.07073|journal=The Astrophysical Journal|volume=872|issue=2|pages=L25|doi=10.3847/2041-8213/ab0426|issn=2041-8213|last15=The Backyard Worlds: Planet 9 Collaboration|last14=Allers|first14=Katelyn|last13=Wisniewski|first13=John|last12=Cushing|first12=Michael|last16=the Disk Detective Collaboration}}</ref><ref>{{Cite web|url=http://www.nasa.gov/feature/goddard/2019/citizen-scientist-finds-ancient-white-dwarf-star-encircled-by-puzzling-rings|title=Citizen Scientist Finds Ancient White Dwarf Star With Puzzling Rings|last=Garner|first=Rob|date=2019-02-19|website=NASA|access-date=2019-12-27}}</ref>
I did co-discover the [[Infrared photography|infrared]] excess around the white dwarf star [[:File:White dwarf LSPM J0207+3331.jpg|LSPM J0207+3331]]<ref>{{Cite journal|last=Debes|doi=10.3847/2041-8213/ab0426|date=2019-02-19|title=A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project|url=http://arxiv.org/abs/1902.07073|journal=The Astrophysical Journal|volume=872|issue=2|pages=L25|issn=2041-8213|last11=Caselden|last15=The Backyard Worlds: Planet 9 Collaboration|last14=Allers|first14=Katelyn|last13=Wisniewski|first13=John|last12=Cushing|first12=Michael|first11=Dan|first10=Michaela|first=John H.|first5=Adam|last2=Thévenot|first2=Melina|last3=Kuchner|first3=Marc|last4=Burgasser|first4=Adam|last5=Schneider|last6=Meisner|last10=Allen|first6=Aaron|last7=Gagné|first7=Jonathan|last8=Faherty|first8=Jaqueline K.|last9=Rees|first9=Jon M.|last16=the Disk Detective Collaboration}}</ref><ref>{{Cite web|url=http://www.nasa.gov/feature/goddard/2019/citizen-scientist-finds-ancient-white-dwarf-star-encircled-by-puzzling-rings|title=Citizen Scientist Finds Ancient White Dwarf Star With Puzzling Rings|last=Garner|first=Rob|date=2019-02-19|website=NASA|access-date=2019-12-27}}</ref>, one of the exoplanets around [[:File:PIA23003 K2-138 System Diagram.jpg|K2-138]]<ref>{{Cite web|url=https://www.zooniverse.org/projects/ianc2/exoplanet-explorers/about/results|title=Exoplanet Explorers - About - Zooniverse|last=|first=|date=|website=www.zooniverse.org|url-status=live|archive-url=|archive-date=|access-date=2019-12-27}}</ref> and more [[:Category:Artist's impressions of exoplanets|exoplanets]]<ref>{{Cite journal|last=Zink|first28=Gabriel|first17=Victoriano|first16=Elisabeth|last24=Henderson|first37=Jouni|last25=Hine|first29=Mark|last29=Nicholson|last28=Murawski|last32=Spencer|first27=Emmanuel|last27=Lambrou|first26=Tony|last26=Hoffman|first25=David|last36=Unsworth|first35=Melina|first24=Joseph|last37=Uusi-Simola|first32=Alton|first23=Stiliyan|last16=Baeten|last12=Schlieder|first12=Joshua E.|last13=Acres|first13=Kevin|last14=Ansorge|first14=Peter|last15=Arienti|first15=Dario|last23=Evstatiev|last33=Tagliabue|first30=Mason|last31=Schwengeler|first36=Christine|first31=Hans Martin|last35=Thévenot|first34=Christopher|last34=Tanner|first33=Aaron|last18=Chitsiga|last30=Russell|first=Jon K.|first6=Chris J.|last10=Dressing|first9=Geert|last9=Barentsen|first8=David R.|last8=Ciardi|first7=John H.|last7=Livingston|last6=Lintott|last11=Ye|first5=Erik A.|last5=Petigura|first4=Ian J. M.|last4=Crossfield|first3=Jessie L.|last3=Christiansen|first2=Kevin K.|last2=Hardegree-Ullman|first10=Courtney D.|first11=Alexander|first22=Adnan|via=|last17=Canales Cerdá|first21=Martin|last21=Ende|first20=James|last20=Damboiu|first19=Maxwell|last19=Daly|first18=Itayi|issn=2515-5172|date=28 February 2019|doi=10.3847/2515-5172/ab0a02|pages=43|issue=2|volume=3|language=en|journal=Research Notes of the AAS|url=https://doi.org/10.3847%2F2515-5172%2Fab0a02|title=Catalog of New K2 Exoplanet Candidates from Citizen Scientists|last22=Erdag}}</ref>. I discovered active photoevaporation of two young M-stars with circumstellar disks in the star cluster [[Collinder 69]] using [[:Category:Spitzer Space Telescope|Spitzer Space Telescope]] images.<ref>{{Cite journal|last=Thévenot|journal=Research Notes of the AAS|issn=2515-5172|doi=10.3847/2515-5172/ab30c5|pages=95|issue=7|volume=3|language=en|url=https://doi.org/10.3847%2F2515-5172%2Fab30c5|first=Melina|title=Photoevaporation of Two Proplyds in the Star Cluster Collinder 69 Discovered with Spitzer MIPS|date=15 July 2019|first3=Hugo A. Durantini|last3=Luca|first2=Katharina|last2=Doll|via=}}</ref> I am one of the [[:File:Galaxyzoo.jpg|galaxy zoo]] volunteers that is actively searching for Voorwerpjes (watch this space). I also do actively search for [[Brown dwarf|brown dwarfs]], which are being observed by researchers of the [[:File:Backyard Worlds logo.png|backyard worlds]] collaboration (more results to come in the future).<ref>{{Cite web|url=https://blog.backyardworlds.org/2019/07/15/one-hundred-thirty-one-brown-dwarfs/|title=One Hundred Thirty-One Brown Dwarfs|last=marckuchner2014|first=Author|date=2019-07-15|website=Backyard Worlds: Planet 9|language=en|access-date=2019-12-27}}</ref>


I also discovered a number of brown dwarfs in the [[w:Backyard Worlds|backyard worlds]] project. I co-disovered several [[w:Brown dwarf#Classification of brown dwarfs|M, L, T and Y-dwarfs]]. These include:
One of my past activities involve being a website moderator at a Zooniverese project, called the [[:File:Milky Way Project.jpg|Milky Way Project]].<ref>{{Cite journal|last=Jayasinghe|first9=Henry A.|first12=Robert J.|issn=0035-8711|doi=10.1093/mnras/stz1738|pages=1141–1165|issue=1|volume=488|journal=Monthly Notices of the Royal Astronomical Society|url=http://arxiv.org/abs/1905.12625|title=The Milky Way Project Second Data Release: Bubbles and Bow Shocks|date=2019-09-01|first11=Sarah|last11=Kendrew|first10=Loren D.|last10=Anderson|last9=Kobulnicky|first=Tharindu|first8=Stella|last8=Offner|first7=Duo|last7=Xu|first6=Denise M.|last6=Lepore|first5=Jose|last5=Velasco|first4=Breanna|last4=Binder|first3=Matthew S.|last3=Povich|first2=Don|last2=Dixon|last12=Simpson}}</ref> Beside my Zooniverse activities I am also involving myself in other projects, such as iNaturatlist and [[NASA]]'s Landslide Reporter. My [[laptop]] is thinking hard about questions coming from SETI@Home, Einstein@Home and Rosetta@Home.


* the Y-dwarf candidate CWISE J1531−3306<ref>{{Cite journal |last=Kirkpatrick |first=J. Davy |last2=Gelino |first2=Christopher R. |last3=Faherty |first3=Jacqueline K. |last4=Meisner |first4=Aaron M. |last5=Caselden |first5=Dan |last6=Schneider |first6=Adam C. |last7=Marocco |first7=Federico |last8=Cayago |first8=Alfred J. |last9=Smart |first9=R. L. |last10=Eisenhardt |first10=Peter R. |last11=Kuchner |first11=Marc J. |last12=Wright |first12=Edward L. |last13=Cushing |first13=Michael C. |last14=Allers |first14=Katelyn N. |last15=Bardalez Gagliuffi |first15=Daniella C. |date=2021-03-01 |title=The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs |url=https://iopscience.iop.org/article/10.3847/1538-4365/abd107 |journal=The Astrophysical Journal Supplement Series |volume=253 |pages=7 |arxiv=2011.11616 |bibcode=2021ApJS..253....7K |doi=10.3847/1538-4365/abd107 |issn=0067-0049}}</ref> (other co-discovers: Samuel J. Goodman & Arttu Sainio)
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=== Gallery research ===
* the L-type binary CWISE J0146−0508AB<ref>{{Cite journal |last=Softich |first=Emma |last2=Schneider |first2=Adam C. |last3=Patience |first3=Jennifer |last4=Burgasser |first4=Adam J. |last5=Shkolnik |first5=Evgenya |last6=Faherty |first6=Jacqueline K. |last7=Caselden |first7=Dan |last8=Meisner |first8=Aaron M. |last9=Kirkpatrick |first9=J. Davy |last10=Kuchner |first10=Marc J. |last11=Gagne |first11=Jonathan |last12=Gagliuffi |first12=Daniella Bardalez |last13=Cushing |first13=Michael C. |last14=Casewell |first14=Sarah L. |last15=Aganze |first15=Christian |date=2022-02-01 |title=CWISE J014611.20-050850.0AB: The Widest Known Brown Dwarf Binary in the Field |url=https://iopscience.iop.org/article/10.3847/2041-8213/ac51d8 |journal=The Astrophysical Journal Letters |volume=926 |issue=2 |pages=L12 |arxiv=2202.02315 |bibcode=2022ApJ...926L..12S |doi=10.3847/2041-8213/ac51d8 |issn=2041-8205}}</ref> (other co-discovers: Nikolaj Stevnbak, Sam Goodman, Dan Caselden, and Frank Kiwy)
* I co-discovered 3 M+T binaries: L26−16AB, UCAC4 307−069397AB & LP 81−30AB (see other co-discoverers in the citation).<ref>{{Cite journal |last=Marocco |first=Federico |last2=Kirkpatrick |first2=J. Davy |last3=Schneider |first3=Adam C. |last4=Meisner |first4=Aaron M. |last5=Popinchalk |first5=Mark |last6=Gelino |first6=Christopher R. |last7=Faherty |first7=Jacqueline K. |last8=Burgasser |first8=Adam J. |last9=Caselden |first9=Dan |last10=Gagné |first10=Jonathan |last11=Aganze |first11=Christian |last12=Bardalez Gagliuffi |first12=Daniella C. |last13=Casewell |first13=Sarah L. |last14=Hsu |first14=Chih-Chun |last15=Kiman |first15=Rocio |date=2024-06-01 |title=Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE |url=https://ui.adsabs.harvard.edu/abs/2024ApJ...967..147M |journal=The Astrophysical Journal |volume=967 |pages=147 |arxiv=2404.14324 |bibcode=2024ApJ...967..147M |doi=10.3847/1538-4357/ad3f1d |issn=0004-637X}}</ref>

I also worked on transient events seen in mid-infrared by the [[w:Wide-field Infrared Survey Explorer|NEOWISE]] mission, mostly [[w:Supernova|supernovae]]. This includes the identification of ASASSN−18ap as a possible [[w:Tidal disruption event|Tidal Disruption Event]],<ref>{{Cite journal |last=Thévenot |first=Melina |date=2020-12-01 |title=Mid-Infrared Detections of SNe II with NEOWISE |url=https://ui.adsabs.harvard.edu/abs/2020RNAAS...4..243T |journal=Research Notes of the American Astronomical Society |volume=4 |pages=243 |doi=10.3847/2515-5172/abd415 |issn=2515-5172}}</ref><ref>{{Cite journal |last=Thévenot |first=Melina |last2=Gantier |first2=Jean Marc |last3=Kabatnik |first3=Martin |last4=Schümann |first4=Jörg |last5=Gramaize |first5=Leopold |date=2021-03-01 |title=Mid-infrared Detections of Type I Supernovae and Unclassified Possible Supernovae with NEOWISE |url=https://ui.adsabs.harvard.edu/abs/2021RNAAS...5...58T |journal=Research Notes of the American Astronomical Society |volume=5 |pages=58 |doi=10.3847/2515-5172/abf120 |issn=2515-5172}}</ref> which was later studied in detail by Wang et al.<ref>{{Cite journal |last=Wang |first=Yibo |last2=Wang |first2=Tinggui |last3=Jiang |first3=Ning |last4=Zhang |first4=Xiaer |last5=Zhu |first5=Jiazheng |last6=Shu |first6=Xinwen |last7=Huang |first7=Shifeng |last8=Zhang |first8=FaBao |last9=Sheng |first9=Zhenfeng |last10=Lin |first10=Zheyu |date=2024-05-01 |title=ASASSN-18ap: A Dusty Tidal Disruption Event Candidate with an Early Bump in the Light Curve |url=https://iopscience.iop.org/article/10.3847/1538-4357/ad2ae4 |journal=The Astrophysical Journal |volume=966 |pages=136 |arxiv=2312.12015 |bibcode=2024ApJ...966..136W |doi=10.3847/1538-4357/ad2ae4 |issn=0004-637X}}</ref> Another variable object related discovery is the discovery of a bright explosion around IRAS 07572−3100, accompanied by the appearance of a new nebula in the optical and near-infrared.<ref>{{Cite journal |last=Thévenot |first=Melina |date=2020-12-01 |title=Appearance of a New Nebula in the Constellation Puppis after an Outburst in 2015 around WISEA J075915.26-310844.6 |url=https://ui.adsabs.harvard.edu/abs/2020RNAAS...4..242T |journal=Research Notes of the American Astronomical Society |volume=4 |pages=242 |doi=10.3847/2515-5172/abd40e |issn=2515-5172}}</ref> This transient was later independently discovered by another team and observed by [[w:Lynne Hillenbrand|Lynne Hillenbrand]] with the [[w:W. M. Keck Observatory|Keck Observatory]].<ref>{{Cite journal |last=Hillenbrand |first=Lynne |date=2021-02-01 |title=IRAS 07572-3100 and the New Nebula in Puppis: Outburst from a Young Stellar Object or an Exotic AGB Star Event? |url=https://ui.adsabs.harvard.edu/abs/2021ATel14416....1H |journal=The Astronomer's Telegram |volume=14416 |pages=1}}</ref>

I also identified dusty tails coming from low-mass stars in several [[w:Star formation|star-forming regions]], which is seen as a sign of [[w:photoevaporation|photoevaporation]].<ref>{{Cite journal |last=Thévenot |first=Melina |last2=Doll |first2=Katharina |last3=Durantini Luca |first3=Hugo A. |date=2019-07-01 |title=Photoevaporation of Two Proplyds in the Star Cluster Collinder 69 Discovered with Spitzer MIPS |url=https://ui.adsabs.harvard.edu/abs/2019RNAAS...3...95T |journal=Research Notes of the American Astronomical Society |volume=3 |pages=95 |doi=10.3847/2515-5172/ab30c5 |issn=2515-5172}}</ref><ref>{{Cite journal |last=Thévenot |first=Melina |date=2020-01-01 |title=Cometary Tails as a Sign of Disk Photoevaporation in NGC 6193 |url=https://ui.adsabs.harvard.edu/abs/2020RNAAS...4...15T |journal=Research Notes of the American Astronomical Society |volume=4 |pages=15 |doi=10.3847/2515-5172/ab701d |issn=2515-5172}}</ref> I am one of the [[w:Galaxy Zoo|galaxy zoo]] volunteers that did actively search for [[w:Voorwerpjes|Voorwerpjes]].<ref>{{Cite journal |last=Keel |first=William |last2=Moiseev |first2=Alexei |last3=Bennert |first3=Vardha Nicola |last4=Maksym |first4=W. |last5=Chojnowski |first5=Stephen |last6=Jonkeren |first6=Alexander |last7=Theunissen |first7=Ine |last8=Thomas |first8=Adam |last9=Simmons |first9=Brooke |last10=Smethurst |first10=Rebecca |last11=O'Ryan |first11=David |last12=Urry |first12=C. |last13=Scarlata |first13=Claudia |date=2024-02-01 |title=The 2nd Galaxy Zoo search for distant EELRs around extant and fading AGN: 40 new Voorwerpjes |url=https://ui.adsabs.harvard.edu/abs/2024AAS...24317508K |journal=American Astronomical Society, AAS Meeting #243 |volume=243 |pages=175.08}}</ref>

=== List of planetary-mass objects ===
I maintain a list of [[w:Rogue planet|free-floating planetary-mass objects]], which I collected from the [[w:Scientific literature|literature]]. These are objects with a mass below 13 jupiter masses and are not orbiting a star, brown dwarf or [[w:Compact object|stellar remnant]]. I called the website that hosts this list "Isolated Planets Archive" and it contains over 400 objects and candidates.<ref>{{Cite web |title=Isolated planets archive |url=https://isolatedplanetsarchive.wordpress.com/ |access-date=2024-08-01 |website=Isolated planets archive |language=en}}</ref>

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===Gallery research===
<gallery>
<gallery>
File:White Dwarf Disk.jpg|Artist's impression of [[:File:White dwarf LSPM J0207+3331.jpg|LSPM J0207+3331]], which I helped to discover
File:White Dwarf Disk.jpg|Artist's impression of LSPM J0207+3331, which I helped to discover
File:IRAS 07572-3100 nebula.png|Variable nebula around the outbursting star IRAS 07572−3100.
File:PIA23002 K2-138 6 Planets Artwork (Artist's Illustration).jpg|The exoplanets around [[:File:PIA23002 K2-138 6 Planets Artwork (Artist's Illustration).jpg|K2-138]]
File:Proplyd Lambda Orionis.png|Cometary tails in the [[w:Lambda Orionis Cluster|Lambda Orionis cluster]].
File:Orion's Big Head Revealed in Infrared.jpg|The region around [[Collinder 69]] seen by [[:File:WISE 2009-4762.jpg|WISE]]. A region that was important for my research.
File:CWISE J0146-0508AB legacy dr10.jpg|The L-type binary CWISE J0146−0508AB.
File:The Teacup Galaxy SDSS 1430.jpg|The [[:File:The Teacup Galaxy SDSS 1430.jpg|Teacup galaxy]] with a Voorwerpje. Our current sample has also spectacular examples.
File:ASASSN-18ap mid-infrared.jpg|Mid-infrared light curve of ASASSN−18ap.
</gallery>
</gallery>


== Creating images ==
==Creating images==
I consider it more of a hobby to create images and gifs out of astronomical data and satellite images. Such as an asteroid in front of the [[:Category:Crab Nebula|crab nebula]].<ref>{{Cite web|url=http://www.esa.int/ESA_Multimedia/Images/2019/10/Foreground_asteroid_passing_the_Crab_Nebula|title=Foreground asteroid passing the Crab Nebula|website=www.esa.int|language=en|access-date=2019-12-27}}</ref><ref>{{Cite web|url=https://www.spacetelescope.org/images/sci19011a/|title=Asteroid in the Crab Nebula (M1)|last=information@eso.org|website=www.spacetelescope.org|language=en|access-date=2019-12-27}}</ref>
I consider it more of a [[w:hobby|hobby]] to create images and [[w:GIF|gifs]] out of astronomical data and [[w:Satellite imagery|satellite images]]. Such as an [[w:asteroid|asteroid]] in front of the [[w:Crab Nebula|crab nebula]].<ref>{{Cite web|url=http://www.esa.int/ESA_Multimedia/Images/2019/10/Foreground_asteroid_passing_the_Crab_Nebula|title=Foreground asteroid passing the Crab Nebula|website=www.esa.int|language=en|access-date=2019-12-27}}</ref><ref>{{Cite web|url=https://www.spacetelescope.org/images/sci19011a/|title=Asteroid in the Crab Nebula (M1)|last=information@eso.org|website=www.spacetelescope.org|language=en|access-date=2019-12-27}}</ref>
[[File:Allwise unwise compared.png|thumb|none|800px|A comparison between [[Wide-field_Infrared_Survey_Explorer#Data_releases|AllWISE]] atlas images (left) and [[Wide-field_Infrared_Survey_Explorer#unWISE_&_CatWISE|unWISE]] coadds (right). The image shows the star forming region [[IC 1590]]. An image I did create for wikipedia]]
[[File:Barnard 35 Spitzer.jpg|alt=|none|thumb|800px|The star-forming region Barnard 35, which is part of the [[:Category:Lambda Orionis|Lambda Orionis Ring]]]]

=== NGC objects and other catalogues ===
I created images of [[w:New_General_Catalogue|NGC objects]] between May 2023 and December 2023. I mostly created images for objects that did not have any images or only had old images from the [[w:Digitized Sky Survey|DSS/DSS2]] surveys on '''wikimedia commons'''. This way I created more than 1000 images. I also created images for [[w:RCW Catalogue|RCW]] and [[w:Barnard Catalogue|Barnard]] catalogues. Sometimes I am working on images for the [[w:New_General_Catalogue#Index_Catalogue|IC objects]]. Most images were created with [[w:Dark_Energy_Spectroscopic_Instrument#DESI_Legacy_Imaging_Surveys|DESI Legacy Imaging Surveys]] data, but for some I used data from the [[w:Hubble Space Telescope|Hubble Space Telescope]]. The software I used was mostly SAO Image DS9 and [[w:Adobe Photoshop|Adobe Photoshop]] Elements.

{{multiple image
| align = none
| total_width = 800
| image1 = NGC 5078 IC 879 legacy dr10.jpg
| alt1 = NGC 5078 IC 879
| caption1 = [[w:NGC 5078|NGC 5078]] and IC 879
| image2 = RCW 42 DECaPS DR2.jpg
| alt2 = RCW 42
| caption2 = [[w:RCW 42|RCW 42]]
| image3 = Barnard 252 decaps dr2.jpg
| alt3 = Barnard 252
| caption3 = Barnard 252
| footer= Example images created with data from the DESI Legacy Imaging Surveys
}}

==Wikipedia edits==
I mostly edit wikipedia pages that already exist. And sometimes I create a new wikipedia article, such as
* the [[w:Teacup galaxy]]
* [[w:Post common envelope binary]]
* [[w:W2150AB]]
* [[w:V1298 Tauri]]
* [[w:List of nearby stellar associations and moving groups]]
* [[w:List of Y-dwarfs]]
* [[w:CWISE J1055+5443]]
* [[w:Wolf 1130]]
* [[w:WISEA 1810−1010]]
* [[w:IM Lupi]]
* [[w:Kojima-1Lb]]
* [[w:BW Sculptoris]]
* [[w:TESS Hunt for Young and Maturing Exoplanets]]
* [[w:SN 2010jl]]
* [[w:Extended emission-line region]]


== References ==
== References ==
{{Reflist}}
{{Reflist}}


== External Links ==
==External Links==
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*https://isolatedplanetsarchive.wordpress.com/ my website

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*https://orcid.org/0000-0001-5284-9231 my [[w:ORCID|ORCID]]
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* https://melinasworldblog.wordpress.com/ my website
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*[https://www.nasa.gov/feature/goddard/2019/citizen-scientist-finds-ancient-white-dwarf-star-encircled-by-puzzling-rings Citizen Scientist Finds Ancient White Dwarf Star Encircled by Puzzling Rings] press-release featuring our discovery
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* https://orcid.org/0000-0001-5284-9231 my [[:File:ORCID logo.svg|ORCID]]
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*[http://www.esa.int/ESA_Multimedia/Images/2019/10/Foreground_asteroid_passing_the_Crab_Nebula Foreground asteroid passing the Crab Nebula] An image that I did create was featured as the "Space Science image of the week" on the [[w:ESA|ESA]] website
* https://en.wikipedia.org/wiki/User:Meli_thev my userpage at wikipedia, which I keep updated
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* [https://www.nasa.gov/feature/goddard/2019/citizen-scientist-finds-ancient-white-dwarf-star-encircled-by-puzzling-rings Citizen Scientist Finds Ancient White Dwarf Star Encircled by Puzzling Rings] press-release featuring our discovery
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* [http://www.esa.int/ESA_Multimedia/Images/2019/10/Foreground_asteroid_passing_the_Crab_Nebula Foreground asteroid passing the Crab Nebula] An image that I did create was featured as the "Space Science image of the week" on the [[ESA]] website

Latest revision as of 07:32, 9 August 2024

I was an astronomy volunteer and I am a co-author of multiple publications. My research area involved brown dwarfs, infrared transient events, debris around white dwarfs and occasionally active supermassive black holes.

Community Science

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In 2018 to 2021 I was doing volunteer work for various projects on Zooniverse. I began with the project Higgs Hunters, but then I became more focused on astronomy and became a moderator for the Milky Way Project.[1] I then made my first discoveries, most notably I did co-discover the infrared excess around the white dwarf star LSPM J0207+3331.[2][3]

I also discovered a number of brown dwarfs in the backyard worlds project. I co-disovered several M, L, T and Y-dwarfs. These include:

  • the Y-dwarf candidate CWISE J1531−3306[4] (other co-discovers: Samuel J. Goodman & Arttu Sainio)
  • the L-type binary CWISE J0146−0508AB[5] (other co-discovers: Nikolaj Stevnbak, Sam Goodman, Dan Caselden, and Frank Kiwy)
  • I co-discovered 3 M+T binaries: L26−16AB, UCAC4 307−069397AB & LP 81−30AB (see other co-discoverers in the citation).[6]

I also worked on transient events seen in mid-infrared by the NEOWISE mission, mostly supernovae. This includes the identification of ASASSN−18ap as a possible Tidal Disruption Event,[7][8] which was later studied in detail by Wang et al.[9] Another variable object related discovery is the discovery of a bright explosion around IRAS 07572−3100, accompanied by the appearance of a new nebula in the optical and near-infrared.[10] This transient was later independently discovered by another team and observed by Lynne Hillenbrand with the Keck Observatory.[11]

I also identified dusty tails coming from low-mass stars in several star-forming regions, which is seen as a sign of photoevaporation.[12][13] I am one of the galaxy zoo volunteers that did actively search for Voorwerpjes.[14]

List of planetary-mass objects

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I maintain a list of free-floating planetary-mass objects, which I collected from the literature. These are objects with a mass below 13 jupiter masses and are not orbiting a star, brown dwarf or stellar remnant. I called the website that hosts this list "Isolated Planets Archive" and it contains over 400 objects and candidates.[15]

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  • Artist's impression of LSPM J0207+3331, which I helped to discover
    Artist's impression of LSPM J0207+3331, which I helped to discover
  • Variable nebula around the outbursting star IRAS 07572−3100.
    Variable nebula around the outbursting star IRAS 07572−3100.
  • Cometary tails in the Lambda Orionis cluster.
    Cometary tails in the Lambda Orionis cluster.
  • The L-type binary CWISE J0146−0508AB.
    The L-type binary CWISE J0146−0508AB.
  • Mid-infrared light curve of ASASSN−18ap.
    Mid-infrared light curve of ASASSN−18ap.

Creating images

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I consider it more of a hobby to create images and gifs out of astronomical data and satellite images. Such as an asteroid in front of the crab nebula.[16][17]

A comparison between AllWISE atlas images (left) and unWISE coadds (right). The image shows the star forming region IC 1590. An image I did create for wikipedia

NGC objects and other catalogues

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I created images of NGC objects between May 2023 and December 2023. I mostly created images for objects that did not have any images or only had old images from the DSS/DSS2 surveys on wikimedia commons. This way I created more than 1000 images. I also created images for RCW and Barnard catalogues. Sometimes I am working on images for the IC objects. Most images were created with DESI Legacy Imaging Surveys data, but for some I used data from the Hubble Space Telescope. The software I used was mostly SAO Image DS9 and Adobe Photoshop Elements.

NGC 5078 IC 879
NGC 5078 and IC 879
RCW 42
RCW 42
Barnard 252
Barnard 252
Example images created with data from the DESI Legacy Imaging Surveys

Wikipedia edits

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I mostly edit wikipedia pages that already exist. And sometimes I create a new wikipedia article, such as

References

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  1. ↑ Jayasinghe, Tharindu (2019-09-01). "The Milky Way Project second data release: bubbles and bow shocks". Monthly Notices of the Royal Astronomical Society 488: 1141–1165. DOI:10.1093/mnras/stz1738. ISSN 0035-8711.
  2. ↑ Debes, John H. (2019-02-19). "A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project". The Astrophysical Journal 872 (2): L25. DOI:10.3847/2041-8213/ab0426. ISSN 2041-8213.
  3. ↑ Garner, Rob (2019-02-19). Citizen Scientist Finds Ancient White Dwarf Star With Puzzling Rings. NASA. Retrieved on 2019-12-27.
  4. ↑ Kirkpatrick, J. Davy (2021-03-01). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs". The Astrophysical Journal Supplement Series 253: 7. DOI:10.3847/1538-4365/abd107. ISSN 0067-0049.
  5. ↑ Softich, Emma (2022-02-01). "CWISE J014611.20-050850.0AB: The Widest Known Brown Dwarf Binary in the Field". The Astrophysical Journal Letters 926 (2): L12. DOI:10.3847/2041-8213/ac51d8. ISSN 2041-8205.
  6. ↑ Marocco, Federico (2024-06-01). "Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE". The Astrophysical Journal 967: 147. DOI:10.3847/1538-4357/ad3f1d. ISSN 0004-637X.
  7. ↑ Thévenot, Melina (2020-12-01). "Mid-Infrared Detections of SNe II with NEOWISE". Research Notes of the American Astronomical Society 4: 243. DOI:10.3847/2515-5172/abd415. ISSN 2515-5172.
  8. ↑ Thévenot, Melina (2021-03-01). "Mid-infrared Detections of Type I Supernovae and Unclassified Possible Supernovae with NEOWISE". Research Notes of the American Astronomical Society 5: 58. DOI:10.3847/2515-5172/abf120. ISSN 2515-5172.
  9. ↑ Wang, Yibo (2024-05-01). "ASASSN-18ap: A Dusty Tidal Disruption Event Candidate with an Early Bump in the Light Curve". The Astrophysical Journal 966: 136. DOI:10.3847/1538-4357/ad2ae4. ISSN 0004-637X.
  10. ↑ Thévenot, Melina (2020-12-01). "Appearance of a New Nebula in the Constellation Puppis after an Outburst in 2015 around WISEA J075915.26-310844.6". Research Notes of the American Astronomical Society 4: 242. DOI:10.3847/2515-5172/abd40e. ISSN 2515-5172.
  11. ↑ Hillenbrand, Lynne (2021-02-01). "IRAS 07572-3100 and the New Nebula in Puppis: Outburst from a Young Stellar Object or an Exotic AGB Star Event?". The Astronomer's Telegram 14416: 1.
  12. ↑ Thévenot, Melina (2019-07-01). "Photoevaporation of Two Proplyds in the Star Cluster Collinder 69 Discovered with Spitzer MIPS". Research Notes of the American Astronomical Society 3: 95. DOI:10.3847/2515-5172/ab30c5. ISSN 2515-5172.
  13. ↑ Thévenot, Melina (2020-01-01). "Cometary Tails as a Sign of Disk Photoevaporation in NGC 6193". Research Notes of the American Astronomical Society 4: 15. DOI:10.3847/2515-5172/ab701d. ISSN 2515-5172.
  14. ↑ Keel, William (2024-02-01). "The 2nd Galaxy Zoo search for distant EELRs around extant and fading AGN: 40 new Voorwerpjes". American Astronomical Society, AAS Meeting #243 243: 175.08.
  15. ↑ Isolated planets archive (in en). Isolated planets archive. Retrieved on 2024-08-01.
  16. ↑ Foreground asteroid passing the Crab Nebula (in en). www.esa.int. Retrieved on 2019-12-27.
  17. ↑ information@eso.org. Asteroid in the Crab Nebula (M1) (in en). www.spacetelescope.org. Retrieved on 2019-12-27.
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