羅斯128
羅斯128是一顆紅矮星,是恆星中第11靠近太陽系的恆星系,距離是10.89光年。它在1926年首度被法蘭克·埃爾莫爾·羅斯記錄在星表中[9]。
這是一顆老的銀盤面星,這意味著它是低金屬量星,並且軌道接近銀河的平面[10]。由於它在數分鐘內的週期內光度就會不可預知的顯著增加,因此被分類為一顆活動中的閃焰星[11]。因為閃焰活動的頻率不高,它被認為是一顆被磁化的恆星,也就是有一些證據顯示恆星的星風有一些磁制動使閃焰的頻率降低,但不能確認是否淨效應[12]。
在研究這顆恆星的多個場合的案例中顯示,這顆恆星有一顆伴星是低質量的棕矮星,在距離主星至少1天文單位的軌道上環繞者,但是迄今尚未發現任何伴星[13][14]。這顆恆星也缺乏額外的紅外線輻射,而過量的紅外線輻射通常是有塵埃環在軌道中環繞恆星的指標[15][16]。
羅斯128環繞銀河的軌道與銀河核心的距離從8.22至10.49千秒差距變化,軌道離心率是0.122[17]。這個軌道會使這顆恆星在未來會更接近太陽系,大約在71,000年之後,它與太陽系的距離大約是1.911 ± 0.026秒差距.[18]。
行星系統
羅斯128的行星系[19][20]
成員 (依恆星距離)
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质量
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半長軸 (AU)
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轨道周期 (天)
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離心率
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傾角
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半径
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b
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7000180000000000000♠1.8+0.56 −0.43 M⊕
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6998492999999999999♠0.0493±0.0017
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7000985960000000000♠9.8596±0.0056
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6998360000000000000♠0.036±0.092
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—
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7000160000000000000♠1.6+1.1 −0.65 R⊕
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相關條目
參考資料
- ^ 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.
- ^ 2.0 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).
- ^ 3.0 3.1 Gautier, T. N.; et al. Far Infrared Properties of M Dwarfs. Bulletin of the American Astronomical Society: 1431. Bibcode:2004AAS...205.5503G.
- ^ 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.
- ^ Warren, W. H., Jr. Photoelectric Photometric Catalogue of Homogeneous Means in the UBV System. Observatory (Geneva). 1978.
- ^ Wilson, Ralph Elmer, General catalogue of stellar radial velocities, Washington: Carnegie Institution of Washington, 1953, Bibcode:1953QB901.W495.....
- ^ 7.0 7.1 Rodonò, Marcello. The Atmospheres of M Dwarfs: Observations. Washington: NASA. : 409–453.
- ^ 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.
- ^ Ross, Frank E. New proper-motion stars, (second list). Astronomical Journal: 124–128. doi:10.1086/104699.
- ^ Sánchez, F. Vazquez, M. , 编. New windows to the universe 2. Cambridge University Press. 1990: 313. ISBN 052138429X.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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).
- ^ 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.
- ^ 引用错误:没有为名为
4-planet 的参考文献提供内容
- ^ 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.
外部連結
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