Gliese 412

	Gliese 412 B
Observationsdata
Rektascension	11t 05m 30,8856s
Deklination	+43° 31′ 17,8843″
Skenbar magnitud ()	+14,45
Stjärntyp
Spektraltyp	M6.0 V
B–V	+2,08
Astrometri
Egenrörelse (µ)	RA: -4 339,891 ± 0,78 mas/år; Dek.: +960,780 ± 0,70 mas/år
Parallax ()	203,8323± 0,0500
Avstånd	16,01 ± 0,004 lå (4,906 ± 0,001 pc)
Absolut magnitud ()	+16,05
Detaljer
Massa	0,10 M☉
Radie	0,13 R☉
Temperatur	2 700 K
Metallicitet	-0,32
Vinkelhastighet	7,7 ± 1,7 km/s
Andra beteckningar
	AKARI-IRC-V1, J1105281+433123, AP J11053133+4331170, CCDM J11055+4332B, 2E 2394, G 176-12, GJ 412 B, LHS 39, LSPM J1105+4331E, 2MASS J11053133+4331170, NLTT 26247, 1RXS J110534.5+433120, UCAC2 46827683, USNO-B1.0 1335-00220269, WX Ursa Majoris, WDS J11055+4332B, WISEA J110526.65+433128.1, WISE J110526.74+433128.0, [GKL99] 234, DR3 778947608243864320, Gaia DR2 778947608243864320

	Gliese 412 A
Observationsdata; Epok: J2000.0
Stjärnbild	Stora björnen
Rektascension	11t 05m 22,3101s
Deklination	+43° 31′ 51,0404″
Skenbar magnitud ()	+8,68
Stjärntyp
Spektraltyp	M1.0 V
U–B	+1,16
B–V	+1,54
Astrometri
Radialhastighet ()	+64,9 ± 0,9 km/s
Egenrörelse (µ)	RA: -4 410,43 ± 0,78 mas/år; Dek.: +942,93 ± 0,70 mas/år
Parallax ()	203,8876± 0,0332
Avstånd	15,997 ± 0,003 lå (4,9047 ± 0,0008 pc)
Absolut magnitud ()	+10,34
Detaljer
Massa	0,48 M☉
Radie	0, R☉
Temperatur	3 687 K
Metallicitet	-0,43
Vinkelhastighet	<3 km/s
Ålder	3 miljarder år
Andra beteckningar
	LHS 38, AC2000 1463341, AG+43 1004, AKARI-IRC-V1, J1105259+433142, AP J11052903+4331357, BD+44 2051, CCDM J11055+4332A, FK5 4979, G 176-11, GJ 412 A, GSC 03012-02528, HIC 54211, HIP 54211, IRAS F11029+4346, IRAS 11027+4347, LSPM J1105+4331W, 2MASS J11052903+4331357, NLTT 26245, PLX 2582, PPM 52239, SAO 43609, TYC 3012-2528-1, UCAC2 46827681, UCAC4 668-057562, USNO-B1.0 1335-00220263, WDS J11055+4332A, WISEA J110524.36+433146.2, WISE J110524.38+433146.2, Gaia DR3 778947814402602752, Gaia DR2 778947814402405120

Gliese 412 är ett par av stjärnor med gemensam egenrörelse, och förmodas vara en dubbelstjärna, i mellersta delen av stjärnbilden Stora björnen. Primärstjärnan har en skenbar magnitud av ca 8,68^[2] och kräver ett mindre teleskop för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 203,9 mas^[5] beräknas den befinna sig på ett avstånd av 16 ljusår (ca 4,9 parsec) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet av ca 65 km/s.^[4] Stjärnorna ingår i halopopulationen i Vintergatan.^[10]

Observation

Primärstjärnan övervakades med avseende på variationer i radiell hastighet (RV) orsakade av en följeslagare med Jupitermassa under en kort period. Den visade inget betydande överskott av RV-variation som kunde tillskrivas en planet.^[18] En sökning av systemet med hjälp av nära infraröd speckle-interferometri misslyckades också att upptäcka en följeslagare som kretsade inom avstånd av 1–10 AE.^[19] Inte heller en brun dvärg har upptäckts i omloppsbana inom systemet.^[20]

Egenskaper

Primärstjärnan Gliese 412 A är en röd dvärgstjärna i huvudserien av spektralklass M1.0 V.^[2] Den har en massa av ca 0,48^[7] solmassa, en radie av ca 0,38^[8] solradie och har en effektiv temperatur av ca 3 700 K.^[9]

Följeslagaren Gliese 412 B är en röd dvärgstjärna i huvudserien av spektralklass M6.0 V.^[14] Den har en massa av ca 0,10^[7] solmassa, en radie av ca 0,13^[8] solradie och har en effektiv temperatur av ca 2 700 K.^[9] Den är en flarestjärna, som även kallas WX Ursae Majoris, och karakteriseras som en variabel stjärna av UV-typ av Ceti som visar sällsynta ökningar i ljusstyrka. Stjärnan observerades av den holländska astronomen Adriaan van Maanen blossa så tidigt som 1939.^[21]

WX Ursae Majoris har identifierats som en källa till röntgenstrålning, medan ingen signifikant röntgenstrålning upptäcktes från komponent A.^[21] Konstellationen hade inte studerats i röntgenbandet före ROSAT-uppdraget.^[22]

Paret har en vinkelseparation på 31,4 bågsekunder vid en positionsvinkel på 126,1°.^[23] De båda stjärnorna har en projicerad separation på ca 152 AE och en beräknad halv storaxel på 190 AE.^[24]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, Gliese 412, 7 juni 2024.

Noter

^ [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ [a b c d e] "BD+44 2051". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2019-10-13.
^ [a b] Nicolet, B. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System". Observatory. Bibcode:1978ppch.book.....N.
^ [a b] Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Bibcode:1967IAUS...30...57E.
^ [a b c d e] van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ [a b c d e f] "The 100 nearest star systems". Research Consortium On Nearby Stars. 2009-09-14. Archived from the original on 2007-11-12. Hämtad 2009-09-14.
^ [a b c d e f] Mann, Andrew W.; et al. (May 2015), "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius", The Astrophysical Journal, 804 (1): 38, arXiv:1501.01635, Bibcode:2015ApJ...804...64M, doi:10.1088/0004-637X/804/1/64, S2CID 19269312, 64.
^ [a b c d] Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (March 2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics. 480 (1): 91–101. arXiv:0712.1370. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788. S2CID 16602121.
^ [a b c] Delfosse, Xavier; Forveille, Thierry; Perrier, Christian; Mayor, Michel (March 1998). "Rotation and chromospheric activity in field M dwarfs". Astronomy and Astrophysics. 331: 581–595. Bibcode:1998A&A...331..581D.
^ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=TYC+3012-2528-1.Hämtad 2024-07-06.
^ "** VBS 18". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2021-05-05.
^ [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ [a b c] "BD+44 2051B". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2019-10-13.
^ [a b] Casagrande, Luca; et al. (September 2008). "M dwarfs: effective temperatures, radii and metallicities". Monthly Notices of the Royal Astronomical Society. 389 (2): 585–607. arXiv:0806.2471. Bibcode:2008MNRAS.389..585C. doi:10.1111/j.1365-2966.2008.13573.x. S2CID 14353142.
^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=BD%2b44+2051B. Hämtad 2024-07-06.
^ Endl, Michael; et al. (September 2006). "Exploring the Frequency of Close-in Jovian Planets around M Dwarfs". The Astrophysical Journal. 649 (1): 436–443. arXiv:astro-ph/0606121. Bibcode:2006ApJ...649..436E. doi:10.1086/506465. S2CID 14461746.
^ Leinert, C.; et al. (September 1997). "A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry". Astronomy and Astrophysics. 325: 159–166. Bibcode:1997A&A...325..159L.
^ Oppenheimer, B. R.; et al. (April 2001). "A Coronagraphic Survey for Companions of Stars within 8 Parsecs". The Astronomical Journal. 121 (4): 2189–2211. arXiv:astro-ph/0101320. Bibcode:2001AJ....121.2189O. doi:10.1086/319941. S2CID 119092593.
^ [a b] Joy, Alfred H. (June 1967). "Stellar Flares". Astronomical Society of the Pacific Leaflets. 10 (456): 41–48. Bibcode:1967ASPL...10...41J.
^ Schmitt JHMM; Fleming TA; Giampapa MS (September 1995). "The X-Ray View of the Low-Mass Stars in the Solar Neighborhood". Astrophys. J. 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149.
^ Gould, Andrew; Chanamé, Julio (February 2004). "New Hipparcos-based Parallaxes for 424 Faint Stars". The Astrophysical Journal Supplement Series. 150 (2): 455–464. arXiv:astro-ph/0309001. Bibcode:2004ApJS..150..455G. doi:10.1086/381147. S2CID 8494577.
^ Reid, I. Neill; Gizis, John E. (June 1997). "Low-Mass Binaries and the Stellar Luminosity Function". Astronomical Journal. 113: 2246–2269. Bibcode:1997AJ....113.2246R. doi:10.1086/118436.

[A-1] [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[B-2] [a b c d e] "BD+44 2051". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2019-10-13.

[E-3] [a b] Nicolet, B. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System". Observatory. Bibcode:1978ppch.book.....N.

[G-4] [a b] Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Bibcode:1967IAUS...30...57E.

[H-5] [a b c d e] van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry

[I-6] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[J-7] [a b c d e f] "The 100 nearest star systems". Research Consortium On Nearby Stars. 2009-09-14. Archived from the original on 2007-11-12. Hämtad 2009-09-14.

[L-8] [a b c d e f] Mann, Andrew W.; et al. (May 2015), "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius", The Astrophysical Journal, 804 (1): 38, arXiv:1501.01635, Bibcode:2015ApJ...804...64M, doi:10.1088/0004-637X/804/1/64, S2CID 19269312, 64.

[M-9] [a b c d] Soubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (March 2008). "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants". Astronomy and Astrophysics. 480 (1): 91–101. arXiv:0712.1370. Bibcode:2008A&A...480...91S. doi:10.1051/0004-6361:20078788. S2CID 16602121.

[N-10] [a b c] Delfosse, Xavier; Forveille, Thierry; Perrier, Christian; Mayor, Michel (March 1998). "Rotation and chromospheric activity in field M dwarfs". Astronomy and Astrophysics. 331: 581–595. Bibcode:1998A&A...331..581D.

[SIMBAD1-11] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=TYC+3012-2528-1.Hämtad 2024-07-06.

[O-12] "** VBS 18". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2021-05-05.

[C-13] [a b] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[D-14] [a b c] "BD+44 2051B". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2019-10-13.

[F-15] [a b] Casagrande, Luca; et al. (September 2008). "M dwarfs: effective temperatures, radii and metallicities". Monthly Notices of the Royal Astronomical Society. 389 (2): 585–607. arXiv:0806.2471. Bibcode:2008MNRAS.389..585C. doi:10.1111/j.1365-2966.2008.13573.x. S2CID 14353142.

[K-16] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[SIMBAD2-17] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=BD%2b44+2051B. Hämtad 2024-07-06.

[R-18] Endl, Michael; et al. (September 2006). "Exploring the Frequency of Close-in Jovian Planets around M Dwarfs". The Astrophysical Journal. 649 (1): 436–443. arXiv:astro-ph/0606121. Bibcode:2006ApJ...649..436E. doi:10.1086/506465. S2CID 14461746.

[S-19] Leinert, C.; et al. (September 1997). "A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry". Astronomy and Astrophysics. 325: 159–166. Bibcode:1997A&A...325..159L.

[T-20] Oppenheimer, B. R.; et al. (April 2001). "A Coronagraphic Survey for Companions of Stars within 8 Parsecs". The Astronomical Journal. 121 (4): 2189–2211. arXiv:astro-ph/0101320. Bibcode:2001AJ....121.2189O. doi:10.1086/319941. S2CID 119092593.

[U-21] [a b] Joy, Alfred H. (June 1967). "Stellar Flares". Astronomical Society of the Pacific Leaflets. 10 (456): 41–48. Bibcode:1967ASPL...10...41J.

[V-22] Schmitt JHMM; Fleming TA; Giampapa MS (September 1995). "The X-Ray View of the Low-Mass Stars in the Solar Neighborhood". Astrophys. J. 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149.

[P-23] Gould, Andrew; Chanamé, Julio (February 2004). "New Hipparcos-based Parallaxes for 424 Faint Stars". The Astrophysical Journal Supplement Series. 150 (2): 455–464. arXiv:astro-ph/0309001. Bibcode:2004ApJS..150..455G. doi:10.1086/381147. S2CID 8494577.

[Q-24] Reid, I. Neill; Gizis, John E. (June 1997). "Low-Mass Binaries and the Stellar Luminosity Function". Astronomical Journal. 113: 2246–2269. Bibcode:1997AJ....113.2246R. doi:10.1086/118436.

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Observationsdata Epok: J2000.0
Gliese 412 A

Stjärnbild	Stora björnen
Rektascension	11^t 05^m 22,3101^s^[1]
Deklination	+43° 31′ 51,0404″^[1]
Skenbar magnitud ( $V$ )	+8,68^[2]
Stjärntyp
Spektraltyp	M1.0 V^[2]
U–B	+1,16^[3]
B–V	+1,54^[3]
Astrometri
Radialhastighet ( $R_{v}$ )	+64,9 ± 0,9^[4] km/s
Egenrörelse (µ)	RA: -4 410,43 ± 0,78^[5] mas/år Dek.: +942,93 ± 0,70^[5] mas/år
Parallax ( $\pi$ )	203,8876± 0,0332^[6]
Avstånd	15,997 ± 0,003 lå (4,9047 ± 0,0008 pc)
Absolut magnitud ( $M_{V}$ )	+10,34^[7]
Detaljer
Massa	0,48^[7] M_☉
Radie	0,^[8] R_☉
Temperatur	3 687^[9] K
Metallicitet	-0,43^[9]
Vinkelhastighet	<3^[10] km/s
Ålder	3^[8] miljarder år
Andra beteckningar
LHS 38, AC2000 1463341, AG+43 1004, AKARI-IRC-V1, J1105259+433142, AP J11052903+4331357, BD+44 2051, CCDM J11055+4332A, FK5 4979, G 176-11, GJ 412 A, GSC 03012-02528, HIC 54211, HIP 54211, IRAS F11029+4346, IRAS 11027+4347, LSPM J1105+4331W, 2MASS J11052903+4331357, NLTT 26245, PLX 2582, PPM 52239, SAO 43609, TYC 3012-2528-1, UCAC2 46827681, UCAC4 668-057562, USNO-B1.0 1335-00220263, WDS J11055+4332A, WISEA J110524.36+433146.2, WISE J110524.38+433146.2, Gaia DR3 778947814402602752, Gaia DR2 778947814402405120^[11]^[12]