GJ 1245

V1581 Cygniのフレアの青色帯光度曲線。左端の点は1シグマの誤差範囲を示しています。CristaldiとRodonò（1976）^{[ 14 ]より改変。}

GJ 1245 (グリーゼ 1245) は、 G 208-44とG 208-45からなる連星で、はくちょう座に位置し、地球から15.2光年(4.7パーセク)離れています。G 208-44 自体は、2 つの赤色矮星からなるより近い連星で、G 208-45 も赤色矮星です。GJ 1245 は、太陽系から43 番目に近い恒星系です。 ^[¹⁵^] GJ 1245 A と B はどちらも活発なフレア星で、^[¹⁶^]このペアはまとめてV1581 Cygniと呼ばれています。^[¹⁷^]

3 つの恒星の中で最も大きい GJ 1245 A (G 208-44 A) は、太陽の質量のわずか 12% です。^{[ 5 ]}他の 2 つの恒星のうち、GJ 1245 C (G 208-44 B) は、恒星 A から 2 AU離れており、最も近い恒星です。 ^{[ 18 ]}太陽の質量の 8% です。^{[ 5 ]} 3 番目の恒星、GJ 1245 B (G 208-45) は、恒星 A から 27 AU 離れており、^{[ 18 ]} 279 年ごとに公転すると推定されています。^{[ 19 ]} GJ 1245 A よりわずかに小さく、光度も低いです。^{[ 11 ]}

注記

↑ AU 単位の半長軸 = ⁠秒単位の半長軸/視差⁠ = ⁠ 0.8267″ / 0.2145745 ⁠ = 36.77AU。離心率が 0.33 なので、距離はその 67% から 133% の間で変動し、おおよそ 24 AU から 49 AU になります。

参考文献

↑ Roman, Nancy G. (1987). "Identification of a constellation from a position" . Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode : 1987PASP...99..695R . doi : 10.1086/132034 .この天体の星座記録はVizieRにあります。
1 2Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.Gaia DR3 record for this source at VizieR.
1 2 3"The One Hundred Nearest Star Systems". RECONS. Retrieved 2016-08-21.
1 2 3 4 5 6Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.Gaia DR3 record for this source at VizieR.
1 2 3 4 5 6 7 8 9 10 11 12 13 14Dieterich, Serge B.; Simler, Andrew; Henry, Todd J.; Jao, Wei-Chun (April 2021). "The Solar Neighborhood. XLVII. Comparing M-dwarf Models with Hubble Space Telescope Dynamical Masses and Spectroscopy". The Astronomical Journal. 161 (4): 172. arXiv:2012.00915. Bibcode:2021AJ....161..172D. doi:10.3847/1538-3881/abd2c2.
1 2"G 208-45". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 June 2024.
↑Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
↑González-Payo, J.; Caballero, J. A.; Cifuentes, C.; Cortés-Contreras, M.; Rica, F. (2026-04-29). "Characterisation of all known multiple stellar systems within 10 pc". Monthly Notices of the Royal Astronomical Society. arXiv:2605.04094.
↑Benedict, G. F.; Henry, T. J.; et al. (November 2016). "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence M Dwarfs". The Astronomical Journal. 152 (5): 141. arXiv:1608.04775. Bibcode:2016AJ....152..141B. doi:10.3847/0004-6256/152/5/141.
1 2 3 4 5Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; von Braun, Kaspar (2015). "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius". The Astrophysical Journal. 804 (1): 64. arXiv:1501.01635. Bibcode:2015ApJ...804...64M. doi:10.1088/0004-637X/804/1/64.
1 2 3Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
1 2Morin, J.; Donati, J. -F.; Petit, P.; Delfosse, X.; Forveille, T.; Jardine, M. M. (2010). "Large-scale magnetic topologies of late M dwarfs". Monthly Notices of the Royal Astronomical Society. 407 (4): 2269. arXiv:1005.5552. Bibcode:2010MNRAS.407.2269M. doi:10.1111/j.1365-2966.2010.17101.x.
↑"G 208-44". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 June 2024.
↑Cristaldi, S.; Rodonò, M. (April 1976). "Discovery of Flare Activity in the Visual Binary G 208-44/45". Astronomy and Astrophysics. 48: 165. Bibcode:1976A&A....48..165C.
↑Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics. 650: A201. arXiv:2104.14972. Bibcode:2021A&A...650A.201R. doi:10.1051/0004-6361/202140985. S2CID 233476431. Data available at https://gruze.org/10pc/Archived 12 March 2023 at the Wayback Machine
↑Lurie, John C.; Davenport, James R. A.; Hawley, Suzanne L.; Wilkinson, Tessa D.; Wisniewski, John P.; Kowalski, Adam F.; Hebb, Leslie (2015). "Kepler Flares III: Stellar Activity on GJ 1245A and B". The Astrophysical Journal. 800 (2): 95. arXiv:1412.6109. Bibcode:2015ApJ...800...95L. doi:10.1088/0004-637X/800/2/95. S2CID 51773906.
↑Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (1978). "63rd Name-List of Variable Stars". Information Bulletin on Variable Stars. 1414: 1. Bibcode:1978IBVS.1414....1K.
1 2Salama, Maïssa; Ou, James; et al. (September 2021). "Large Adaptive Optics Survey for Substellar Objects around Young, Nearby, Low-mass Stars with Robo-AO". The Astronomical Journal. 162 (3): 102. arXiv:2105.13364. Bibcode:2021AJ....162..102S. doi:10.3847/1538-3881/ac0445.
↑Tokovinin, Andrei (2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5.

外部リンク

http://jumk.de/astronomie/near-stars/v1581-cygni.shtml
http://www.answers.com/topic/list-of-nearest-stars?cat=travel
http://www.richweb.f9.co.uk/astro/nearby_stars.htm

[10] AU 単位の半長軸 = ⁠秒単位の半長軸/視差⁠ = ⁠ 0.8267″ / 0.2145745 ⁠ = 36.77AU。離心率が 0.33 なので、距離はその 67% から 133% の間で変動し、おおよそ 24 AU から 49 AU になります。

[constellation-1] Roman, Nancy G. (1987). "Identification of a constellation from a position" . Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode : 1987PASP...99..695R . doi : 10.1086/132034 .この天体の星座記録はVizieRにあります。

[GaiaDR3A-2] 1 2Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.Gaia DR3 record for this source at VizieR.

[RECONS-3] 1 2 3"The One Hundred Nearest Star Systems". RECONS. Retrieved 2016-08-21.

[GaiaDR3B-4] 1 2 3 4 5 6Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875.Gaia DR3 record for this source at VizieR.

[Dieterich2021-5] 1 2 3 4 5 6 7 8 9 10 11 12 13 14Dieterich, Serge B.; Simler, Andrew; Henry, Todd J.; Jao, Wei-Chun (April 2021). "The Solar Neighborhood. XLVII. Comparing M-dwarf Models with Hubble Space Telescope Dynamical Masses and Spectroscopy". The Astronomical Journal. 161 (4): 172. arXiv:2012.00915. Bibcode:2021AJ....161..172D. doi:10.3847/1538-3881/abd2c2.

[SIMBAD2-6] 1 2"G 208-45". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 June 2024.

[gcvs-7] Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.

[Gonzalez-Payo2026-8] González-Payo, J.; Caballero, J. A.; Cifuentes, C.; Cortés-Contreras, M.; Rica, F. (2026-04-29). "Characterisation of all known multiple stellar systems within 10 pc". Monthly Notices of the Royal Astronomical Society. arXiv:2605.04094.

[Benedict2016-9] Benedict, G. F.; Henry, T. J.; et al. (November 2016). "The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence M Dwarfs". The Astronomical Journal. 152 (5): 141. arXiv:1608.04775. Bibcode:2016AJ....152..141B. doi:10.3847/0004-6256/152/5/141.

[mann2015-11] 1 2 3 4 5Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; von Braun, Kaspar (2015). "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius". The Astrophysical Journal. 804 (1): 64. arXiv:1501.01635. Bibcode:2015ApJ...804...64M. doi:10.1088/0004-637X/804/1/64.

[tic-12] 1 2 3Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.

[morin2010-13] 1 2Morin, J.; Donati, J. -F.; Petit, P.; Delfosse, X.; Forveille, T.; Jardine, M. M. (2010). "Large-scale magnetic topologies of late M dwarfs". Monthly Notices of the Royal Astronomical Society. 407 (4): 2269. arXiv:1005.5552. Bibcode:2010MNRAS.407.2269M. doi:10.1111/j.1365-2966.2010.17101.x.

[SIMBAD1-14] "G 208-44". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 June 2024.

[Cristaldi-15] Cristaldi, S.; Rodonò, M. (April 1976). "Discovery of Flare Activity in the Visual Binary G 208-44/45". Astronomy and Astrophysics. 48: 165. Bibcode:1976A&A....48..165C.

[Reylé2021-16] Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics. 650: A201. arXiv:2104.14972. Bibcode:2021A&A...650A.201R. doi:10.1051/0004-6361/202140985. S2CID 233476431. Data available at https://gruze.org/10pc/Archived 12 March 2023 at the Wayback Machine

[Lurie2015-17] Lurie, John C.; Davenport, James R. A.; Hawley, Suzanne L.; Wilkinson, Tessa D.; Wisniewski, John P.; Kowalski, Adam F.; Hebb, Leslie (2015). "Kepler Flares III: Stellar Activity on GJ 1245A and B". The Astrophysical Journal. 800 (2): 95. arXiv:1412.6109. Bibcode:2015ApJ...800...95L. doi:10.1088/0004-637X/800/2/95. S2CID 51773906.

[ibvs-18] Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (1978). "63rd Name-List of Variable Stars". Information Bulletin on Variable Stars. 1414: 1. Bibcode:1978IBVS.1414....1K.

[Salama2021-19] 1 2Salama, Maïssa; Ou, James; et al. (September 2021). "Large Adaptive Optics Survey for Substellar Objects around Young, Nearby, Low-mass Stars with Robo-AO". The Astronomical Journal. 162 (3): 102. arXiv:2105.13364. Bibcode:2021AJ....162..102S. doi:10.3847/1538-3881/ac0445.

[msc-20] Tokovinin, Andrei (2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5.

[ 14 ]より改変。

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[ 5 ]

[ 18 ]

[ 19 ]

[ 11 ]

GJ 1245

関連項目

注記

参考文献

Further reading

外部リンク

関連するトピック

座標

V1581 Cygniのフレアの青色帯

光度曲線

はくちょう座