格利澤1

维基百科,自由的百科全书
跳转至: 导航搜索
GJ 1
觀測資料
曆元 J2000
星座 玉夫座
星官
赤經 00h 05m 24.4279s[1]
赤緯 −37° 21′ 26.503″[1]
視星等(V) 8.57[2]
特性
光谱分类 M1.5V[2]
U−B 色指数 +1.04[3]
B−V 色指数 +1.46[3]
变星类型 天龍座BY[4]
天体测定
径向速度 (Rv) +23.6 ± 2[5] km/s
自行 (μ) 赤经:5633.95[1] mas/yr
赤纬:-2336.69[1] mas/yr
视差 (π) 229.32 ± 1.08[1] mas
距离 14.22 ± 0.07 ly
(4.36 ± 0.02 pc)
绝对星等 (MV) 10.35[6]
詳細資料
質量 0.45[7]–0.48[8] M
半徑 0.46–0.48[9] R
溫度 3,380[10] K
自轉速度 (v sin i) 4.8[11] km/s
年齡 (0.1 ± 0.1) × 106[12]
其他命名
GJ 1, Giclas 267-025, CD -37°15492, CPD−37°9435, GC 49, GCTP 5817.00, HD 225213, HIP 439, LHS 1, LTT 23, NLTT 134, NSV 15017, SAO 192348.[2]
參考資料庫
SIMBAD data

格利澤1Gliese-Jahreiss 1或GJ 1)是在南半球玉夫座內的一顆紅矮星。它是最靠近太陽的恆星之一,距離大約是14.2光年。但是它的視星等只有8.5等,因為太暗必須借助於望遠鏡才能看見[2]

性質[编辑]

根據同的資料來源,這顆恆星的分類在M1.5V到M4.0V之間[13]。估計格利澤1的質量是太陽的45–48%[7][8]半徑是太陽的46–48%[9]

這顆恆星被確認是天龍座BY變星,變星標示為NSV 15017[4],它也被確認為焰星[14]。像其它的焰星一樣,它輻射出X射線[15]

使用散斑干涉儀觀察這顆恆星的近紅外線光譜,被解釋為有一顆伴星在軌道上環繞著。但是,在距離主星1天文單位的距離內沒有發現比10.5等亮的天體,在10天文單位以內沒有比12.5等亮的天體[16]。徑向速度的測量也未能查出存在軌道上環繞著的伴星。這些觀測排除了在適居帶內有數個地球質量的行星,在1天文單位或更近的軌道距離內也沒有木星質量的行星。精確度達到20m/s的徑向速度的測量顯示很小,甚至沒有變化[17]

這顆恆星的空間速度分量分別是:U = +77.2,V = -99.5,和W = -35.6 km/s.[18]。它以離心率0.45的軌道環繞銀河系,與銀河核心的距離變化從3,510到9,150秒差距。相比之下,太陽目前與銀河核心的距離是8,500秒差距[19]。具有高本動速度的恆星被稱為速逃星。這顆恆星的本動速度達到111.38公里/秒,並且這顆星的速度向量可與杜鵑-時鐘和/或劍魚座AB星協相聯結[12]

由於它的赤經位置非常接近曆元1950.0分點的原點,因此在格利澤近星星表魯坦星表都是第一顆恆星[20][21]

相關條目[编辑]

參考資料[编辑]

  1. ^ 1.0 1.1 1.2 1.3 1.4 Perryman, M. A. C. et al. The HIPPARCOS Catalogue. Astronomy & Astrophysics. 1997.April, 323: L49–L52. Bibcode:1997A&A...323L..49P. 
  2. ^ 2.0 2.1 2.2 2.3 NSV 15017 -- Flare Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2006-06-12]. 
  3. ^ 3.0 3.1 Cousins, A. W. J. UBV Photometry of Some Southern Stars(Third List). Monthly Notes Astronomical Society of South Africa. 1973, 32 (2): 43–48. 
  4. ^ 4.0 4.1 General Catalogue of Variable Stars NSV 15017. Centre de Données astronomiques de Strasbourg. [2009-12-14]. 
  5. ^ Wilson, R. E. General Catalogue of Stellar Radial Velocities. Carnegie Institute of Washington D.C. 1953. Bibcode:1953GCRV..C......0W. 
  6. ^ Schmitt JHMM, Liefke C. NEXXUS: A comprehensive ROSAT survey of coronal X-ray emission among nearby solar-like stars. Astron Astrophys. 2004.April, 417: 651–65. 
  7. ^ 7.0 7.1 Zechmeister, M.; Kürster, M.; Endl, M. The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs. arXiv. August 6, 2009. arXiv:0908.0944. 
  8. ^ 8.0 8.1 The One Hundred Nearest Star Systems. RECONS. Georgia State University. 2009-01-01 [2009-09-08]. 
  9. ^ 9.0 9.1 Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. Catalogue of Apparent Diameters and Absolute Radii of Stars(CADARS)-Third edition - Comments and statistics. Astronomy and Astrophysics. 2001.February, 367: 521–524. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.  Note: Search the VizieR catalogue II/224 for HD 225213.
  10. ^ Gautier, Thomas N., III; et al. Far-Infrared Properties of M Dwarfs. The Astrophysical Journal. 2007.September, 667 (1): 527–536. Bibcode:2007ApJ...667..527G. doi:10.1086/520667. 
  11. ^ Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo. Astronomy and Astrophysics. 2009.January, 493 (3): 1099–1107. Bibcode:2009A&A...493.1099S. doi:10.1051/0004-6361:200810377. 
  12. ^ 12.0 12.1 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun. Monthly Notices of the Royal Astronomical Society. 2011.January, 410 (1): 190–200. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. 
  13. ^ M1.5: SIMBAD. M3: Gautier, Thomas N., III; et al (2007). M3: Schmitt, J. H. M. M.; et al (2004). M4: Eggen, Olin J. (1996) M4: Pasinetti-Fracassini, L. E.; et al (2001).
  14. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition. Astronomy and Astrophysics Supplement. 1999.November, 139: 555–558. Bibcode:1999A&AS..139..555G. doi:10.1051/aas:1999407. 
  15. ^ Schmitt JHMM, Fleming TA, Giampapa MS. The X-ray view of the low-mass stars in the solar neighborhood. Ap J. 1995.September, 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149. 
  16. ^ Leinert, C.; Henry, T.; Glindemann, A.; McCarthy, D. W., Jr. A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry. Astronomy and Astrophysics. 1997.September, 325: 159–166. Bibcode:1997A&A...325..159L. 
  17. ^ Zechmeister, M.; Kürster, M.; Endl, M. The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs. Astronomy and Astrophysics. 2009.October, 505 (2): 859–871. arXiv:0908.0944. Bibcode:2009A&A...505..859Z. doi:10.1051/0004-6361/200912479. 
  18. ^ Eggen, Olin J. Distribution and Corrlation of Age, Abundance, and Motion of Lower Main Sequence Stars. Astronomical Journal. 1996.January, 111: 466–475. Bibcode:1996AJ....111..466E. doi:10.1086/117797. 
  19. ^ Allen, Christine; Santillan, Alfredo. An improved model of the galactic mass distribution for orbit computations. Revista Mexicana de Astronomia y Astrofisica. 1991.October, 22: 255–263. Bibcode:1991RMxAA..22..255A. 
  20. ^ Gliese, W. Catalogue of Nearby Stars. Veröffentlichungen des Astronomischen Rechen-Instituts Heidelberg. 1969. Bibcode:1969VeARI..22....1G. 
  21. ^ Luyten, W. J. LHS (Luyten half-second) Catalogue.. Minneapolis, Minnesota: University of Minnesota. 1976 [2009-09-09].