格利泽1
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 玉夫座 |
| 星官 | |
| 赤经 | 00h 05m 24.4279s[1] |
| 赤纬 | −37° 21′ 26.503″[1] |
| 视星等（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 | 天龙座BY型[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] |
| 详细资料 | |
| 质量 | 0.45[7]–0.48[8] M☉ |
| 半径 | 0.46–0.48[9] R☉ |
| 温度 | 3,380[10] K |
| 自转速度 (v sin i) | 4.8[11] km/s |
| 年龄 | (0.1 ± 0.1) × 106[12] 年 |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
格利泽1（Gliese-Jahreiss 1或GJ 1）是在南半球玉夫座内的一颗红矮星。它是最靠近太阳的恒星之一，距离大约是14.2光年。但是它的视星等只有8.5等，因为太暗必须借助于望远镜才能看见[2]
性质
[编辑]根据同的资料来源，这颗恒星的分类在M1.5V到M4.0V之间[13]。估计格利泽1的质量是太阳的45–48%[7][8]，半径是太阳的46–48%[9]。
这颗恒星被确认是天龙座BY型变星，变星标示为NSV 15017[4]，它也被确认为焰星[14]。像其它的焰星一样，它辐射出X射线[15]。
使用散斑干涉仪观察这颗恒星的近红外线光谱，被解释为有一颗伴星在轨道上环绕着。但是，在距离主星1天文单位的距离内没有发现比10.5等亮的天体，在10天文单位以内没有比12.5等亮的天体[16]。径向速度的测量也未能查出存在轨道上环绕着的伴星。这些观测排除了在适居带内有数个地球质量的行星，在1天文单位或更近的轨道距离内也没有木星质量的行星。精确度达到20m/s的径向速度的测量显示很小，甚至没有变化[17]。
这颗恒星的空间速度分量分别是：U = +77.2，V = -99.5，和W = -35.6 km/s.[18]。它以离心率0.45的轨道环绕银河系，与银河核心的距离变化从3,510到9,150秒差距。相比之下，太阳目前与银河核心的距离是8,500秒差距[19]。具有高本动速度的恒星被称为速逃星。这颗恒星的本动速度达到111.38公里/秒，并且这颗星的速度向量可与杜鹃-时钟和/或剑鱼座AB星协相联结[12]。
由于它的赤经位置非常接近历元1950.0分点的原点，因此在格利泽近星星表和鲁坦星表都是第一颗恒星[20][21]。
相关条目
[编辑]参考资料
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 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 2.2 2.3 NSV 15017 -- Flare Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2006-06-12]. （原始内容存档于2019-06-05）.
- ^ 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.
- ^ 4.0 4.1 General Catalogue of Variable Stars NSV 15017. Centre de Données astronomiques de Strasbourg. [2009-12-14]. （原始内容存档于2018-10-03）.
- ^ Wilson, R. E. General Catalogue of Stellar Radial Velocities. Carnegie Institute of Washington D.C. 1953. Bibcode:1953GCRV..C......0W.
- ^ Schmitt JHMM, Liefke C. NEXXUS: A comprehensive ROSAT survey of coronal X-ray emission among nearby solar-like stars. Astron Astrophys. April 2004, 417: 651–65.
- ^ 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. .
- ^ 8.0 8.1 The One Hundred Nearest Star Systems. RECONS. Georgia State University. 2009-01-01 [2009-09-08]. （原始内容存档于2012-05-14）.
- ^ 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. February 2001, 367: 521–524. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. Note: Search the VizieR catalogue II/224 （页面存档备份，存于互联网档案馆） for HD 225213.
- ^ Gautier, Thomas N., III; et al. Far-Infrared Properties of M Dwarfs. The Astrophysical Journal. September 2007, 667 (1): 527–536. Bibcode:2007ApJ...667..527G. doi:10.1086/520667.
- ^ 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. January 2009, 493 (3): 1099–1107. Bibcode:2009A&A...493.1099S. doi:10.1051/0004-6361:200810377.
- ^ 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. January 2011, 410 (1): 190–200. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.
- ^ 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).
- ^ 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. November 1999, 139: 555–558. Bibcode:1999A&AS..139..555G. doi:10.1051/aas:1999407.
- ^ Schmitt JHMM, Fleming TA, Giampapa MS. The X-ray view of the low-mass stars in the solar neighborhood. Ap J. September 1995, 450 (9): 392–400. Bibcode:1995ApJ...450..392S. doi:10.1086/176149.
- ^ 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. September 1997, 325: 159–166. Bibcode:1997A&A...325..159L.
- ^ 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. October 2009, 505 (2): 859–871. Bibcode:2009A&A...505..859Z. arXiv:0908.0944
. doi:10.1051/0004-6361/200912479.
- ^ Eggen, Olin J. Distribution and Corrlation of Age, Abundance, and Motion of Lower Main Sequence Stars. Astronomical Journal. January 1996, 111: 466–475. Bibcode:1996AJ....111..466E. doi:10.1086/117797.
- ^ Allen, Christine; Santillan, Alfredo. An improved model of the galactic mass distribution for orbit computations. Revista Mexicana de Astronomia y Astrofisica. October 1991, 22: 255–263. Bibcode:1991RMxAA..22..255A.
- ^ Gliese, W. Catalogue of Nearby Stars. Veröffentlichungen des Astronomischen Rechen-Instituts Heidelberg. 1969. Bibcode:1969VeARI..22....1G.
- ^ Luyten, W. J. LHS (Luyten half-second) Catalogue.. Minneapolis, Minnesota: University of Minnesota. 1976 [2009-09-09]. （原始内容存档于2019-06-10）.
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