天苑增三

(重定向自天苑增十七

天炉座α(α Fornacis, α For)是天炉座最亮的恒星,但只比4等星亮一点。中国传统名天苑增三[9],它在西洋的固有名称是Dalim (出自皮亚齐的星表Palermo Catalogue英语Palermo Catalogue[10][11][12]Fornacis(在Burritt英语Elijah Hinsdale Burritt星图[13]。这颗恒星最初的名称是 波江座12

天炉座α

天炉座α的位置(左上)
观测资料
历元 J2000
星座 天炉座
星官 天苑昴宿
赤经 3h 12m 04.5277s[1]
赤纬 –28° 59′ 15.425″[1]
视星等(V) 3.85[2]
特性
光谱分类F8IV[3]
U−B 色指数+0.082[4]
B−V 色指数+0.581[4]
天体测定
径向速度 (Rv)–20.5[5] km/s
自行 (μ) 赤经:371.49[1] mas/yr
赤纬:612.28[1] mas/yr
视差 (π)70.24 ± 0.45[1] mas
距离46.4 ± 0.3 ly
(14.24 ± 0.09 pc)
详细资料
质量1.33 ± 0.01[6] M
半径2.04 ± 0.06[7] R
表面重力 (log g)4.27[6]
亮度4.87 ± 0.16[7] L
温度6,240[6] K
金属量 [Fe/H]–0.20[6] dex
自转速度 (v sin i)3.9[7] km/s
年龄2.9[8] Gyr
其他命名
12 Eridani, CD-29 1177, GJ 127, HD 20010, HIP 14879, HR 963, LTT 1512, SAO 168373.[2]
参考数据库
SIMBAD资料

天炉座α的光谱类型是F8IV,其中的IV表示它的亮度是在演化上已经离开主序星次巨星[14]。它的质量比太阳重约33%,年龄是29亿岁[6][8]。天炉座α是一对联星 [15],有着高自行运动[2]。这个系统显示出红外过量,暗示可能有类似岩屑盘的拱星盘[16]

第二颗恒星已经被确认是颗蓝掉队星,它可能是合并了之前存在的第三颗恒星,或是累积了它的物质。它是个强X射线源,质量约为太阳的78% [17]

这颗恒星的空间速度元件是(U、 V、 W) = (–35,+ 20,+ 30)km/s[18]。大约35万年前,天炉座α星曾于A型主序星时钟座ν有过一次亲密的接触。估计曾互相接近至0.265 ly(0.081 pc)的距离,使这两颗恒星都有岩屑盘[19]

参考资料

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  1. ^ 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. ^ 2.0 2.1 2.2 LHS 1515 -- High proper-motion Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2010-05-10]. (原始内容存档于2016-04-13). 
  3. ^ Favata, F.; Micela, G.; Sciortino, S. The [Fe/H] distribution of a volume limited sample of solar-type stars and its implications for galactic chemical evolution.. Astronomy and Astrophysics. July 1997, 323: 809–818. Bibcode:1997A&A...323..809F. 
  4. ^ 4.0 4.1 Rakos, K. D.; et al. Photometric and astrometric observations of close visual binaries. Astronomy and Astrophysics Supplement Series. February 1982, 47: 221–235. Bibcode:1982A&AS...47..221R. 
  5. ^ Evans, D. S. The Revision of the General Catalogue of Radial Velocities. Batten, Alan Henry; Heard, John Frederick (编). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. June 20–24, 1966 [2009-09-10]. Bibcode:1967IAUS...30...57E. (原始内容存档于2019-06-26). 
  6. ^ 6.0 6.1 6.2 6.3 6.4 Santos, N. C.; Israelian, G.; Mayor, M. The metal-rich nature of stars with planets. Astronomy and Astrophysics. July 2001, 373 (3): 1019–1031. Bibcode:2001A&A...373.1019S. arXiv:astro-ph/0105216 . doi:10.1051/0004-6361:20010648. 
  7. ^ 7.0 7.1 7.2 Bruntt, H.; et al, Accurate fundamental parameters for 23 bright solar-type stars, Monthly Notices of the Royal Astronomical Society, July 2010, 405 (3): 1907–1923, Bibcode:2010MNRAS.405.1907B, arXiv:1002.4268 , doi:10.1111/j.1365-2966.2010.16575.x 
  8. ^ 8.0 8.1 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs. Astronomy and Astrophysics. May 2004, 418 (3): 989–1019. Bibcode:2004A&A...418..989N. arXiv:astro-ph/0405198 . doi:10.1051/0004-6361:20035959.  See VizierR catalogue V/130页面存档备份,存于互联网档案馆).
  9. ^ 伊世同 《中西对照恒星图表》
  10. ^ Piazzi, G (编). Praecipuarum Stellarum Inerrantium Positiones Mediae Ineunte Saeculo XIX: ex Observationibus Habitis in Specula Panormitana ab anno 1792 ad annum 1813. Palermo. 1814: 21. 
  11. ^ Kunitzsch, P. Arabische Sternnamen in Europa. Wiesbaden: Otto Harrassowitz. 1959: 155. 
  12. ^ Laffitte, R. Héritages arabes: Des noms arabes pour les étoiles 2éme revue et corrigée. Paris: Librairie Orientaliste Paul Geunthner / Les Cahiers de l'Orient. 2005: 229. 
  13. ^ Burritt, E. H. Atlas, Designed to Illustrate the Geography of the Heavens new. New York: F. J. Huntington. 1835.  plate III.
  14. ^ Lopez, Bruno; Schneider, Jean; Danchi, William C. Can Life Develop in the Expanded Habitable Zones around Red Giant Stars?. The Astrophysical Journal. July 2005, 627 (2): 974–985. Bibcode:2005ApJ...627..974L. arXiv:astro-ph/0503520 . doi:10.1086/430416. 
  15. ^ Söderhjelm, Staffan. Visual binary orbits and masses POST HIPPARCOS. Astronomy and Astrophysics. January 1999, 341: 121–140. Bibcode:1999A&A...341..121S. 
  16. ^ Oudmaijer, Rene D.; et al. SAO stars with infrared excess in the IRAS Point Source Catalog. Astronomy and Astrophysics Supplement Series. December 1992, 96 (3): 625–643. Bibcode:1992A&AS...96..625O. 
  17. ^ Fuhrmann, K.; Chini, R., Multiplicity among F-type Stars. II, The Astrophysical Journal, August 2015, 809 (1): 19, Bibcode:2015ApJ...809..107F, doi:10.1088/0004-637X/809/1/107, 107. 
  18. ^ Gliese, W. Catalogue of Nearby Stars. Veröffentlichungen des Astronomischen Rechen-Instituts Heidelberg. 1969. Bibcode:1969VeARI..22....1G. 
  19. ^ Deltorn, J.-M.; Kalas, P. Search for Nemesis Encounters with Vega, ε Eridani, and Fomalhaut. Ray Jayawardhana; Thomas Greene (编). Young Stars Near Earth: Progress and Prospects. ASP Conference Series 244. San Francisco: Astronomical Society of the Pacific: 227. 2001. Bibcode:2001ASPC..244..227D. ISBN 1-58381-082-X. 

外部链接

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