蝘蜓座DI
外观
观测资料 历元 J2000 | |
---|---|
星座 | 蝘蜓座 |
星官 | |
赤经 | 11h 07m 20.72163s[1] |
赤纬 | −77° 38′ 07.2903″[1] |
视星等(V) | 10.655[2] |
特性 | |
光谱分类 | G0e[3] |
U−B 色指数 | +0.630[2] |
B−V 色指数 | +1.144[2] |
变星类型 | 金牛座T[4] |
天体测定 | |
自行 (μ) | 赤经:−24.61[1] mas/yr 赤纬:3.45[1] mas/yr |
视差 (π) | 4.49 ± 1.59[1] mas |
距离 | approx. 700 ly (approx. 220 pc) |
详细资料 [5] | |
Aa | |
质量 | 1.7 M☉ |
半径 | 2.00 R☉ |
亮度 | 4.7 L☉ |
温度 | 6,030 K |
年龄 | 7.1 Myr |
Ba/Bb | |
质量 | 0.18 M☉ |
半径 | 1.13 R☉ |
亮度 | 0.11 L☉ |
温度 | 3,130 K |
年龄 | 3.0 Myr |
其他命名 | |
参考数据库 | |
SIMBAD | 资料 |
蝘蜓座DI,也称为Hen 3-593或HIP 54365,是在蝘蜓座的一个四重星恒星系统。这个系统与地球的距离大约是700光年。
蝘蜓座DI是一颗金牛座T型变星,是正接近主序带的初期恒星体。它的视星等不稳定,在10.65 和10.74等之间变化著[4]。尽管它在视觉上很黯淡,但它之所以被注意到,是因为它的光谱中有明显的发射[6]。
在1977年,蝘蜓座DI被发现有一个更微弱的同伴[7]。后来测得的分离距离为4.6",大约644AU[8]。伴星B被发现是一对相距仅0.066"(约10AU)的恒星[9],这两颗恒星的光谱类型都是M5.5 [10]。最后,人们发现这颗变得主星有一个距离0.2"(约30AU)的微弱伴星,光谱类型为M6[10]。
参考资料
[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. S2CID 18759600. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 Kilkenny, D.; Whittet, D. C. B.; Davies, J. K.; Evans, A.; Bode, M. F.; Robson, E. I.; Banfield, R. M. Optical and infrared photometry of southern early-type shell stars and pre-main-sequence variables. In Its South African Astronomical Observatory Circular No. 9 P 55-86 (SEE N86-18271 08-89). 1985, 9: 55. Bibcode:1985SAAOC...9...55K.
- ^ Torres, C. A. O.; Quast, G. R.; Da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. Search for associations containing young stars (SACY). I. Sample and searching method. Astronomy and Astrophysics. 2006, 460 (3): 695. Bibcode:2006A&A...460..695T. S2CID 16080025. arXiv:astro-ph/0609258
. doi:10.1051/0004-6361:20065602.
- ^ 4.0 4.1 Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1. Bibcode:2009yCat....102025S.
- ^ Daemgen, S.; Petr-Gotzens, M. G.; Correia, S.; Teixeira, P. S.; Brandner, W.; Kley, W.; Zinnecker, H. Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I. Astronomy & Astrophysics. 2013, 554: A43. Bibcode:2013A&A...554A..43D. S2CID 59440639. arXiv:1304.1150
. doi:10.1051/0004-6361/201321220.
- ^ Henize, Karl G. Emission-Line Stars in an Obscured Region in Chamaeleon. Astronomical Journal. 1963, 68: 280. Bibcode:1963AJ.....68S.280H. doi:10.1086/109141.
- ^ Schwartz, R. D. A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars. Astrophysical Journal Supplement Series. 1977, 35: 161. Bibcode:1977ApJS...35..161S. doi:10.1086/190473.
- ^ Reipurth, Bo; Zinnecker, Hans. Visual binaries among pre-main sequence stars. Astronomy and Astrophysics. 1993, 278: 81. Bibcode:1993A&A...278...81R.
- ^ Lafrenière, David; Jayawardhana, Ray; Brandeker, Alexis; Ahmic, Mirza; Van Kerkwijk, Marten H. A Multiplicity Census of Young Stars in Chamaeleon I. The Astrophysical Journal. 2008, 683 (2): 844–861. Bibcode:2008ApJ...683..844L. S2CID 2998049. arXiv:0803.0561
. doi:10.1086/590239.
- ^ 10.0 10.1 Schmidt, T. O. B.; Vogt, N.; Neuhäuser, R.; Bedalov, A.; Roell, T. New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Hα 5 in the Chamaeleon I star-forming region. Astronomy & Astrophysics. 2013, 557: A80. Bibcode:2013A&A...557A..80S. S2CID 67802847. arXiv:1307.1082
. doi:10.1051/0004-6361/201220660.
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