天苑十一
外观
(重定向自波江座τ4)
此條目需要擴充。 (2018年2月23日) |
觀測資料 曆元 J2000.0 (ICRS) | |
---|---|
星座 | 波江座 |
星官 | |
赤經 | 03h 19m 31.00224s[1] |
赤緯 | −21° 45′ 28.3049″[1] |
視星等(V) | 3.65[2] |
特性 | |
光谱分类 | M3/4 III[3] |
U−B 色指数 | +1.79[2] |
B−V 色指数 | +1.61[2] |
变星类型 | Lb[4] |
天体测定 | |
徑向速度 (Rv) | ±0.7 +41.7[5] km/s |
自行 (μ) | 赤经:+51.89[1] mas/yr 赤纬:+32.92[1] mas/yr |
视差 (π) | 10.71 ± 0.54[1] mas |
距离 | 300 ± 20 ly (93 ± 5 pc) |
绝对星等 (MV) | −0.79[6] |
詳細資料 | |
質量 | ±0.3 1.8[7] M☉ |
半徑 | 106[8] R☉ |
亮度 | 1,537[9] L☉ |
溫度 | 3,712[7] K |
其他命名 | |
參考資料庫 | |
SIMBAD | 资料 |
天苑十一(波江座τ4)是位于波江座的双星系统,其视星等为3.65。
参考文献
[编辑]- ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752
, doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 Mermilliod, J.-C., Compilation of Eggen's UBV data, transformed to UBV (unpublished), SIMBAD, 1986, Bibcode:1986EgUBV........0M.
- ^ Houk, N.; Smith-Moore, M., Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars 4, 1988, Bibcode:1988MSS...C04....0H.
- ^ Ruban, E. V.; et al, Spectrophotometric observations of variable stars, Astronomy Letters, September 2006, 32 (9): 604–607, Bibcode:2006AstL...32..604R, doi:10.1134/S1063773706090052.
- ^ Gontcharov, G. A., Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system, Astronomy Letters, November 2006, 32 (11): 759–771, Bibcode:2006AstL...32..759G, arXiv:1606.08053
, doi:10.1134/S1063773706110065.
- ^ Cardini, D., Mg II chromospheric radiative loss rates in cool active and quiet stars, Astronomy and Astrophysics, January 2005, 430: 303−311, Bibcode:2005A&A...430..303C, arXiv:astro-ph/0409683
, doi:10.1051/0004-6361:20041440.
- ^ 7.0 7.1 Halabi, Ghina M.; Eid, Mounib El. Exploring masses and CNO surface abundances of red giant stars. Monthly Notices of the Royal Astronomical Society. 2015, 451 (3): 2957. Bibcode:2015MNRAS.451.2957H. arXiv:1507.01517
. doi:10.1093/mnras/stv1141.
- ^ Lang, Kenneth R., Astrophysical formulae, Astronomy and astrophysics library 1 3, Birkhäuser, 2006 [2018-02-23], ISBN 3-540-29692-1, (原始内容存档于2019-05-20). The radius (R*) is given by:
- ^ McDonald, I.; et al, Fundamental Parameters and Infrared Excesses of Hipparcos Stars, Monthly Notices of the Royal Astronomical Society, 2012, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037
, doi:10.1111/j.1365-2966.2012.21873.x.
- ^ [ 请检查
|url=
值 (帮助). SIMBAD. 斯特拉斯堡天文資料中心. [2016-10-13]. tau04 Eri]