罗斯128是一颗红矮星,是恒星中第11靠近太阳系恒星系,距离是10.89光年。它在1926年首度被法兰克·埃尔莫尔·罗斯记录在星表中[9]

罗斯128
观测资料
历元 J2000
星座 室女座
星官
赤经 11h 47m 44.3964s[1]
赤纬 +00° 48′ 16″[1]
视星等(V) 11.13[2]
特性
光谱分类M4 V[3]
U−B 色指数2.685[4]
B−V 色指数1.59[5]
变星类型闪焰星
天体测定
径向速度 (Rv)-13[6] km/s
自行 (μ) 赤经:605.66[1] mas/yr
赤纬:-1219.32[1] mas/yr
视差 (π)299.59 ± 2.20[1] mas
距离10.89 ± 0.08 ly
(3.34 ± 0.02 pc)
绝对星等 (MV)13.51[2]
详细资料
质量0.15[7] M
半径0.21[8] R
表面重力 (log g)3.40[7]
亮度0.00029[来源请求] L
温度3,180[3] K
其他命名
FI Virginis, FI Vir, GCTP 2730, LHS 315, GJ 447, G 010-050, Vyssotsky英语Alexander N. Vyssotsky 286, LTT 13240, LFT 852, HIP 57548.[1]

这是一颗老的银盘面星,这意味着它是低金属量星,并且轨道接近银河的平面[10]。由于它在数分钟内的周期内光度就会不可预知的显著增加,因此被分类为一颗活动中的闪焰星[11]。因为闪焰活动的频率不高,它被认为是一颗被磁化的恒星,也就是有一些证据显示恒星的星风有一些磁制动使闪焰的频率降低,但不能确认是否净效应[12]

在研究这颗恒星的多个场合的案例中显示,这颗恒星有一颗伴星是低质量的棕矮星,在距离主星至少1天文单位的轨道上环绕者,但是迄今尚未发现任何伴星[13][14]。这颗恒星也缺乏额外的红外线辐射,而过量的红外线辐射通常是有尘埃环在轨道中环绕恒星的指标[15][16]

罗斯128环绕银河的轨道与银河核心的距离从8.22至10.49千秒差距变化,轨道离心率是0.122[17]。这个轨道会使这颗恒星在未来会更接近太阳系,大约在71,000年之后,它与太阳系的距离大约是1.911 ± 0.026秒差距.[18]

行星系统

编辑
罗斯128的行星系[19][20]
成员
(依恒星距离)
质量 半长轴
(AU)
轨道周期
()
离心率 倾角 半径
b 1.8+0.56
−0.43
 M
0.0493±0.0017 9.8596±0.0056 0.036±0.092 1.6+1.1
−0.65
 R

相关条目

编辑

参考资料

编辑
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 Perryman, M. A. C.; et al. The HIPPARCOS Catalogue. Astronomy & Astrophysics. April 1997, 323: L49–L52. Bibcode:1997A&A...323L..49P. 
  2. ^ 2.0 2.1 The One Hundred Nearest Star Systems. Research Consortium on Nearby Stars. 2009-01-01 [2009-09-03]. (原始内容存档于2012-05-14). 
  3. ^ 3.0 3.1 Gautier, T. N.; et al. Far Infrared Properties of M Dwarfs. Bulletin of the American Astronomical Society: 1431. Bibcode:2004AAS...205.5503G. 
  4. ^ Rufener, F. Second catalogue of stars measured in the Geneva Observatory photometric system. Astronomy & Astrophysics Supplement Series. October 1976, 26: 275–351. Bibcode:1976A&AS...26..275R. 
  5. ^ Warren, W. H., Jr. Photoelectric Photometric Catalogue of Homogeneous Means in the UBV System. Observatory (Geneva). 1978. 
  6. ^ Wilson, Ralph Elmer, General catalogue of stellar radial velocities, Washington: Carnegie Institution of Washington, 1953, Bibcode:1953QB901.W495..... 
  7. ^ 7.0 7.1 Rodonò, Marcello. The Atmospheres of M Dwarfs: Observations. Washington: NASA. : 409–453.  |booktitle=被忽略 (帮助)
  8. ^ White, Stephen M.; Jackson, Peter D.; Kundu, Mukul R. A VLA survey of nearby flare stars. Astrophysical Journal Supplement Series. December 1989, 71: 895–904. doi:10.1086/191401. 
  9. ^ Ross, Frank E. New proper-motion stars, (second list). Astronomical Journal: 124–128. doi:10.1086/104699. 
  10. ^ Sánchez, F. Vazquez, M. , 编. New windows to the universe 2. Cambridge University Press. 1990: 313. ISBN 052138429X. 
  11. ^ Kunkel, W. E. Solar neighborhood flare stars - A review. Variable stars and stellar evolution; Proceedings of the Symposium. Moscow, USSR: D. Reidel Publishing Co: 15–46. July 29-August 4, 1974. Bibcode:1975IAUS...67...15K. 
  12. ^ Skumanich, Andrew. Some evidence on the evolution of the flare mechanism in dwarf stars. Astrophysical Journal, Part 1. 1986-10-15, 309: 858–863. doi:10.1086/164654. 
  13. ^ Hinz, Joannah L.; McCarthy, Donald W., Jr.; Simons, Doug A.; Henry, Todd J.; Kirkpatrick, J. Davy; McGuire, Patrick C. A Near-Infrared, Wide-Field, Proper-Motion Search for Brown Dwarfs. The Astronomical Journal. April 2002, 123 (4): 2027–2032. doi:10.1086/339555. 
  14. ^ Schroeder, Daniel J. A Search for Faint Companions to Nearby Stars Using the Wide Field Planetary Camera 2. The Astronomical Journal. 2000, 119: 906–922. doi:10.1086/301227. 
  15. ^ Jura, M.; et al. Mid-Infrared Spectra of Dust Debris around Main-Sequence Stars. The Astrophysical Journal Supplement Series. September 2004, 154 (1): 453–457. doi:10.1086/422975. 
  16. ^ Gautier, Thomas N., III; et al. Far-Infrared Properties of M Dwarfs. The Astrophysical Journal. September 2007, 667 (1): 527–536. doi:10.1086/520667. 
  17. ^ Allen, C.; Herrera, M. A. The galactic orbits of nearby UV Ceti stars. Revista Mexicana de Astronomia y Astrofisica. 1998, 34: 37–46 [2008-06-13]. (原始内容存档于2018-10-07). 
  18. ^ García-Sánchez, J.; Weissman, P. R.; Preston, R. A.; Jones, D. L.; Lestrade, J.-F.; Latham, D. W.; Stefanik, R. P.; Paredes, J. M. Stellar encounters with the solar system. Astronomy and Astrophysics. 2001, 379: 634–659. doi:10.1051/0004-6361:20011330. 
  19. ^ 引用错误:没有为名为4-planet的参考文献提供内容
  20. ^ Tasker, Elizabeth J.; Laneuville, Matthieu; Guttenberg, Nicholas. Estimating Planetary Mass with Deep Learning. The Astronomical Journal. 7 January 2020, 159 (2): 41. Bibcode:2020AJ....159...41T. ISSN 1538-3881. S2CID 208267900. arXiv:1911.11035 . doi:10.3847/1538-3881/ab5b9e. 

外部链接

编辑