WISEPA J062309.94-045624.6: Difference between revisions
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{{short description|WISE J0623-0456 is a cold brown dwarf with radio emission.}} |
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{{Starbox begin |
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| name = WISE J0623-0456 |
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}} |
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{{Starbox image |
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| image = [[File:WISE J0623-0456 VLT HAWKI.jpg|250px]] |
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| caption = [[Very Large Telescope]] image of WISE J0623-0456 |
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| credit = <!--credit for image if the image's use requires them (optional)--> |
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}} |
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{{Starbox observe |
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| epoch = J2000 |
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| equinox = J2000 |
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| constell = [[Monoceros]] |
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| ra = {{RA|06|23|09.68}} |
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| dec = {{Dec|-04|56|23.52}} |
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}} |
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{{Starbox character |
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| type = brown dwarf |
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| class = T8<ref name="Kirkpatrick2011"/> |
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| variable =rotational variable<ref name="Rose2023"/> |
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}} |
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{{Starbox astrometry |
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| prop_mo_ra = -906.3 ±1.8 |
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| prop_mo_dec = 168.8 ±1.6 |
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| pm_footnote = <ref name="Kirkpatrick2021"/> |
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| parallax = 86.5 |
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| p_error = 1.7 |
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| parallax_footnote = <ref name="Kirkpatrick2021"/> |
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}} |
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{{Starbox detail |
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| mass_mj = {{val|13.18|31.26|9.44}}<ref name="Zhang2023"/> {{jupiter mass}}<br/>12.28 ±13.06<ref name="Sanghi2024"/> |
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| radius_rj = {{val|0.78|0.17|0.13}}<ref name="Zhang2023"/> {{ jupiter radius}}<br/>1.11 ±0.14<ref name="Sanghi2024"/> |
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| luminosity_bolometric = 10<sup>{{val|-5.755|0.060|0.049}}</sup><ref name="Zhang2023"/> |
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| gravity = {{val|4.70|0.47|0.42}}<ref name="Zhang2023"/> |
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| temperature = {{val|743|53|51}}<ref name="Zhang2023"/> K<br/>624 ±40<ref name="Sanghi2024"/> |
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| metal = {{val|-0.32|0.18|0.16}}<ref name="Zhang2023"/> |
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| rotation = 1.912 ± 0.005 hours<ref name="Rose2023"/> |
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| rotational_velocity = {{val|60|70|55}}<ref name="Zhang2023"/> km/s<br/>>63<ref name="Rose2023"/> |
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| age_myr = {{val|738|2701|592}}<ref name="Zhang2023"/> |
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}} |
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{{Starbox catalog |
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| names =CNS5 1581, WISEA J062309.92-045624.5, WISEP J062309.94-045624.6, EQ J0623-0456 |
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}} |
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{{Starbox reference |
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| Simbad =WISE+J062309.94-045624.6 |
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}} |
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{{starbox end}} |
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'''WISEPA J062309.94-045624.6''' (also called '''WISE J0623-0456''') is a [[brown dwarf]] of [[T dwarf|spectral type T8]]. It is the coldest brown dwarf with a [[Radio astronomy|radio emission]] (as of October 2024).<ref name="Rose2023"/> |
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WISE J0623-0456 was discovered in 2011 with the [[Wide-field Infrared Survey Explorer]] and a spectrum with the [[NASA Infrared Telescope Facility]] confirmed it as a T8-dwarf.<ref name="Kirkpatrick2011"/> WISE J0623-0456 was identified as a radio source with the [[Australian Square Kilometre Array Pathfinder|Australian SKA Pathfinder]]. Follow-up observations were carried out with the [[Australia Telescope Compact Array|Australian Telescope Compact Array]] (ATCA) and [[MeerKAT]]. The source showed a double-peaked pulsed emission, with a period of 1.889 ± 0.018 hours in ATCA and 1.912 ± 0.005 hours in MeerKAT. The source has a radio luminousity of 10<sup>14.8</sup> [[erg]] s<sup>−1</sup> [[Hertz|Hz]]<sup>−1</sup> and is comparable to other radio bright [[ultracool dwarf|ultracool dwarfs]] with a similar spectral type. The radio emission of WISE J0623-0456 is s strongly circularly polarized and periodic. The researchers therefore think that the radio emission comes from electron cyclotron maser instability (ECMI), which is connected to [[aurora]] in ultracool dwarfs. The researchers find that the magnetic field has a strength of at least B > 0.71 [[Gauss (unit)|kG]].<ref name="Rose2023"/> |
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== See also == |
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Other T-dwarfs with detected radio emission<ref name="Rose2023"/> |
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* [[SIMP J013656.5+093347.3]] T2.5, planetary-mass object |
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* [[WISEP J112254.73+255021.5]] T6 |
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* [[2MASS J10475385+2124234]] T6.5 |
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* [[2MASS J12373919+6526148]] T6.5 |
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* [[BDR J1750+3809]] T6.5 |
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* [[WISEP J101905.63+652954.2]] T7+T5.5 |
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== References == |
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{{reflist|refs= |
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<ref name="Kirkpatrick2011">{{Cite journal |last=Kirkpatrick |first=J. Davy |last2=Cushing |first2=Michael C. |last3=Gelino |first3=Christopher R. |last4=Griffith |first4=Roger L. |last5=Skrutskie |first5=Michael F. |last6=Marsh |first6=Kenneth A. |last7=Wright |first7=Edward L. |last8=Mainzer |first8=A. |last9=Eisenhardt |first9=Peter R. |last10=McLean |first10=Ian S. |last11=Thompson |first11=Maggie A. |last12=Bauer |first12=James M. |last13=Benford |first13=Dominic J. |last14=Bridge |first14=Carrie R. |last15=Lake |first15=Sean E. |date=2011-12-01 |title=The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE) |url=https://ui.adsabs.harvard.edu/abs/2011ApJS..197...19K/abstract |journal=The Astrophysical Journal Supplement Series |volume=197 |pages=19 |arxiv=1108.4677 |bibcode=2011ApJS..197...19K |doi=10.1088/0067-0049/197/2/19 |issn=0067-0049}}</ref> |
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<ref name="Rose2023">{{Cite journal |last=Rose |first=Kovi |last2=Pritchard |first2=Joshua |last3=Murphy |first3=Tara |last4=Caleb |first4=Manisha |last5=Dobie |first5=Dougal |last6=Driessen |first6=Laura |last7=Duchesne |first7=Stefan W. |last8=Kaplan |first8=David L. |last9=Lenc |first9=Emil |last10=Wang |first10=Ziteng |date=2023-07-01 |title=Periodic Radio Emission from the T8 Dwarf WISE J062309.94-045624.6 |url=https://ui.adsabs.harvard.edu/abs/2023ApJ...951L..43R/abstract |journal=The Astrophysical Journal |volume=951 |pages=L43 |arxiv=2306.15219 |bibcode=2023ApJ...951L..43R |doi=10.3847/2041-8213/ace188 |issn=0004-637X}}</ref> |
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<ref name="Kirkpatrick2021">{{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://ui.adsabs.harvard.edu/abs/2021ApJS..253....7K/abstract |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> |
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<ref name="Zhang2023">{{Cite journal |last=Zhang |first=Zhoujian |last2=Liu |first2=Michael C. |last3=Marley |first3=Mark S. |last4=Line |first4=Michael R. |last5=Best |first5=William M. J. |date=2021-11-01 |title=Uniform Forward-modeling Analysis of Ultracool Dwarfs. II. Atmospheric Properties of 55 Late-T Dwarfs |url=https://ui.adsabs.harvard.edu/abs/2021ApJ...921...95Z/abstract |journal=The Astrophysical Journal |volume=921 |pages=95 |arxiv=2105.05256 |bibcode=2021ApJ...921...95Z |doi=10.3847/1538-4357/ac0af7 |issn=0004-637X}}</ref> |
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<ref name="Sanghi2024">{{Cite web |last=Sanghi |first=Aniket |date=November 8, 2023 |title=Table of Ultracool Fundamental Properties |url=https://zenodo.org/records/10086810 |access-date=2024-10-05 |website=zenodo}}</ref> |
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}} |
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[[Category:Monoceros]] |
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[[Category:Astronomical radio sources]] |
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Revision as of 12:30, 5 October 2024
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 06h 23m 09.68s |
| Declination | −04° 56′ 23.52″ |
| Characteristics | |
| Evolutionary stage | brown dwarf |
| Spectral type | T8[1] |
| Variable type | rotational variable[2] |
| Astrometry | |
| Proper motion (μ) | RA: -906.3 ±1.8 mas/yr[3] Dec.: 168.8 ±1.6 mas/yr[3] |
| Parallax (π) | 86.5 ± 1.7 mas[3] |
| Distance | 37.7 ± 0.7 ly (11.6 ± 0.2 pc) |
| Details | |
| Mass | 13.18+31.26 −9.44[4] MJ 12.28 ±13.06[5] MJup |
| Radius | 0.78+0.17 −0.13[4] RJ 1.11 ±0.14[5] RJup |
| Luminosity (bolometric) | 10−5.755+0.060 −0.049[4] L☉ |
| Surface gravity (log g) | 4.70+0.47 −0.42[4] cgs |
| Temperature | 743+53 −51[4] K 624 ±40[5] K |
| Metallicity | −0.32+0.18 −0.16[4] |
| Rotation | 1.912 ± 0.005 hours[2] |
| Rotational velocity (v sin i) | 60+70 −55[4] km/s >63[2] km/s |
| Age | 738+2701 −592[4] Myr |
| Other designations | |
CNS5 1581, WISEA J062309.92-045624.5, WISEP J062309.94-045624.6, EQ J0623-0456 | |
| Database references | |
| SIMBAD | data |
WISEPA J062309.94-045624.6 (also called WISE J0623-0456) is a brown dwarf of spectral type T8. It is the coldest brown dwarf with a radio emission (as of October 2024).[2]
WISE J0623-0456 was discovered in 2011 with the Wide-field Infrared Survey Explorer and a spectrum with the NASA Infrared Telescope Facility confirmed it as a T8-dwarf.[1] WISE J0623-0456 was identified as a radio source with the Australian SKA Pathfinder. Follow-up observations were carried out with the Australian Telescope Compact Array (ATCA) and MeerKAT. The source showed a double-peaked pulsed emission, with a period of 1.889 ± 0.018 hours in ATCA and 1.912 ± 0.005 hours in MeerKAT. The source has a radio luminousity of 1014.8 erg s−1 Hz−1 and is comparable to other radio bright ultracool dwarfs with a similar spectral type. The radio emission of WISE J0623-0456 is s strongly circularly polarized and periodic. The researchers therefore think that the radio emission comes from electron cyclotron maser instability (ECMI), which is connected to aurora in ultracool dwarfs. The researchers find that the magnetic field has a strength of at least B > 0.71 kG.[2]
See also
Other T-dwarfs with detected radio emission[2]
- SIMP J013656.5+093347.3 T2.5, planetary-mass object
- WISEP J112254.73+255021.5 T6
- 2MASS J10475385+2124234 T6.5
- 2MASS J12373919+6526148 T6.5
- BDR J1750+3809 T6.5
- WISEP J101905.63+652954.2 T7+T5.5
References
- ^ a b Kirkpatrick, J. Davy; Cushing, Michael C.; Gelino, Christopher R.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Mainzer, A.; Eisenhardt, Peter R.; McLean, Ian S.; Thompson, Maggie A.; Bauer, James M.; Benford, Dominic J.; Bridge, Carrie R.; Lake, Sean E. (2011-12-01). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)". The Astrophysical Journal Supplement Series. 197: 19. arXiv:1108.4677. Bibcode:2011ApJS..197...19K. doi:10.1088/0067-0049/197/2/19. ISSN 0067-0049.
- ^ a b c d e f Rose, Kovi; Pritchard, Joshua; Murphy, Tara; Caleb, Manisha; Dobie, Dougal; Driessen, Laura; Duchesne, Stefan W.; Kaplan, David L.; Lenc, Emil; Wang, Ziteng (2023-07-01). "Periodic Radio Emission from the T8 Dwarf WISE J062309.94-045624.6". The Astrophysical Journal. 951: L43. arXiv:2306.15219. Bibcode:2023ApJ...951L..43R. doi:10.3847/2041-8213/ace188. ISSN 0004-637X.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b Kirkpatrick, J. Davy; Gelino, Christopher R.; Faherty, Jacqueline K.; Meisner, Aaron M.; Caselden, Dan; Schneider, Adam C.; Marocco, Federico; Cayago, Alfred J.; Smart, R. L.; Eisenhardt, Peter R.; Kuchner, Marc J.; Wright, Edward L.; Cushing, Michael C.; Allers, Katelyn N.; Bardalez Gagliuffi, Daniella C. (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. arXiv:2011.11616. Bibcode:2021ApJS..253....7K. doi:10.3847/1538-4365/abd107. ISSN 0067-0049.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b c d e f g h Zhang, Zhoujian; Liu, Michael C.; Marley, Mark S.; Line, Michael R.; Best, William M. J. (2021-11-01). "Uniform Forward-modeling Analysis of Ultracool Dwarfs. II. Atmospheric Properties of 55 Late-T Dwarfs". The Astrophysical Journal. 921: 95. arXiv:2105.05256. Bibcode:2021ApJ...921...95Z. doi:10.3847/1538-4357/ac0af7. ISSN 0004-637X.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b c Sanghi, Aniket (November 8, 2023). "Table of Ultracool Fundamental Properties". zenodo. Retrieved 2024-10-05.