巨蟹座EI,又称为G 9-38GJ 1116,此恒星系统是由两颗位于巨蟹座红矮星组成。[11]该系统相对较近,距太阳16.8光年。[12] 该系统具有非常高的恒星耀斑活动,平均每小时有五次耀斑。[1]

GJ 1116

巨蟹座EI上的几个耀斑的紫外线波段[1]
观测资料
历元 J2000
星座 巨蟹座
星官
赤经 08h 58m 15.194s[2]
赤纬 +19° 45′ 47.08″[2]
视星等(V) 13.720[3]
特性
光谱分类M8Ve+M7V[4][5]
天体测定
G 9-38 A
径向速度 (Rv)13 ± 5[6] km/s
自行 (μ) 赤经:−767.060±0.122[7] mas/yr
赤纬:−100.176±0.083[7] mas/yr
视差 (π)194.1443 ± 0.1228[7] mas
距离16.80 ± 0.01 ly
(5.151 ± 0.003 pc)
G 9-38 B
自行 (μ) 赤经:−937.133±0.190[8] mas/yr
赤纬:−34.559±0.138[8] mas/yr
视差 (π)196.2619 ± 0.1976[8] mas
距离16.62 ± 0.01 ly
(5.095 ± 0.005 pc)
轨道
主星G 9-38A
伴星G 9-38B
绕行周期 (P)360 yr
半长轴 (a)33 AU
详细资料 [9][10]
G 9-38A
质量0.12 M
亮度 (bolometric)0.000965 L
温度2896+18
K
金属量 [Fe/H]-0.12(未确实) dex
G 9-38B
质量0.10 M
亮度 (bolometric)0.000992 L
其他命名
EI Cnc、​GJ 1116、​WDS J08582+1945AB、​G 9-38、​G 47-14、​G 41-11、​LP 426-40、​LTT 12343、​PLX 2144.03、​GSC 01397-01138、​2MASS J08581519+1945470
参考数据库
SIMBADThe system
A
B
G 9-38 is located in the constellation Cancer
G 9-38 is located in the constellation Cancer
G 9-38
巨蟹座EI在巨蟹座中的位置

2015年,对系统中第三颗星的搜索没有得出结论。[13]

参考资料

编辑
  1. ^ 1.0 1.1 Pettersen, B. R. Discovery of flare activity on the low luminosity red dwarf system G9-38 AB. Astronomy & Astrophysics. July 1985, 148: 151–154 [11 November 2021]. Bibcode:1985A&A...148..151P. (原始内容存档于2023-03-20). 
  2. ^ 2.0 2.1 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003). CDS/ADC Collection of Electronic Catalogues. 2003, 2246: II/246 [2023-03-20]. Bibcode:2003yCat.2246....0C. (原始内容存档于2022-09-20). 
  3. ^ Zacharias, N. The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4). VizieR On-line Data Catalog. 2012. Bibcode:2012yCat.1322....0Z. 
  4. ^ G9-38A. SIMBAD. 斯特拉斯堡天文资料中心. 
  5. ^ G9-38B. SIMBAD. 斯特拉斯堡天文资料中心. 
  6. ^ G9-38. SIMBAD. 斯特拉斯堡天文资料中心. 
  7. ^ 7.0 7.1 7.2 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  8. ^ 8.0 8.1 8.2 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 .  已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  9. ^ Rojas-Ayala, Bárbara; Covey, Kevin R.; Muirhead, Philip S.; Lloyd, James P., Metallicity and Temperature Indicators in M dwarf K band Spectra: Testing New & Updated Calibrations With Observations of 133 Solar Neighborhood M dwarfs, The Astrophysical Journal, 2011, 748 (2): 93, S2CID 41902340, arXiv:1112.4567 , doi:10.1088/0004-637X/748/2/93 
  10. ^ Nearby Star Summary Table. [2023-03-20]. (原始内容存档于2021-01-18). 
  11. ^ Vizier query: Name=G* 1116页面存档备份,存于互联网档案馆), Centre de Données astronomiques de Strasbourg , accessed 30 December 2012.
  12. ^ Nearby Stars Catalog (NSC) 互联网档案馆存档,存档日期2021-02-27., Planetary Habitability Laboratory, University of Puerto Rico at Arecibo accessed 31 December 2012.
  13. ^ Davison, Cassy L.; White, R. J.; Henry, T. J.; Riedel, A. R.; Jao, W-C.; Bailey Iii, J. I.; Quinn, S. N.; Cantrell, J. R.; Subasavage, J. P.; Winters, J. G., A 3D Search for Companions to 12 Nearby M-Dwarfs, The Astronomical Journal, 2015, 149 (3): 106, Bibcode:2015AJ....149..106D, S2CID 9719725, arXiv:1501.05012 , doi:10.1088/0004-6256/149/3/106