OGLE-TR-123

OGLE-TR-123是一個聯星系統。主星是已經測量出半徑最小的主序。它是在光學重力透鏡實驗(OGLE)巡天中發現的,是軌道周期大約1.80天,由一顆較小的伴星掩蔽一顆較大主星的聯星系統[2]

OGLE-TR-123
觀測資料
曆元 J2000.0 (ICRS)
星座 船底座
星官
赤經 11h 06m 51.19s[1]
赤緯 -61° 11 10.1[1]
視星等(V)
特性
光谱分类F (primary)/M (b)[2]
视星等 (I)15.40 (system)[1]
变星类型食雙星
天体测定
距离5000 ± 1000 ly
(1600 ± 400[2] pc)
軌道
繞行週期 (P)1.804[2] days
半長軸 (a)0.031 ± 0.002 AU[2]
偏心率 (e)0[2]
倾斜角 (i)8690°[2]°
詳細資料 [2]
OGLE-TR-123A
質量1.3 M
半徑1.55 R
溫度6700 ± 300 K
OGLE-TR-123b
質量0.085 M
半徑0.13 R
其他命名
V816 Car, 2MASS J11065112-6111103
參考資料庫
SIMBAD资料

估計較小的伴星,OGLE-TR-123b半徑大約是0.13太陽半徑,質量大約0.085太陽質量M),或木星質量的90倍。OGLE-TR-123b的質量接近恆星質量的下限。對進行融合的恆星,這個值大約是0.07或0.08M[3]。OGLE-TR-123b是第二顆質量小於0.1M,而且已經測量出半徑的恆星;第一顆這樣的恆星是相似的OGLE-TR-122b[2]

相關條目

參考資料

  1. The Optical Gravitational Lensing Experiment. Additional Planetary and Low-Luminosity Object Transits from the OGLE 2001 and 2002 Observational Campaigns, A. Udalski, G. Pietrzynski, M. Szymanski, M. Kubiak, K. Zebrun, I. Soszynski, O. Szewczyk, and L. Wyrzykowski, Acta Astronomica 53 (June 2003), pp. 133149.
  2. Radius and mass of a transiting M dwarf near the hydrogen-burning limit. OGLE-TR-123, F. Pont, C. Moutou, F. Bouchy, R. Behrend, M. Mayor, S. Udry, D. Queloz, N. Santos, and C. Melo, Astronomy and Astrophysics 447, #3 (March 1, 2006), pp. 10351039. doi:10.1051/0004-6361:20053692. Bibcode2006A&A...447.1035P.
  3. Theory of Low-Mass Stars and Substellar Objects 页面存档备份,存于, Gilles Chabrier and Isabelle Baraffe, Annual Review of Astronomy and Astrophysics 38 (2000), pp. 337377.
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