波江座λ型变星
外观
波江座λ型变星是Be星的一类,它的光度振幅很微小,只有百分之几的星等。它的变化非常规律,周期在0.5至2.0天之间,最初被描述为周期性的Be星[1]。波江座λ是此类变星的原形,也是范例。变化归因于非径向脉动,是不均匀的旋转盘或恒星本身的旋转[2][3]。
这种恒星不是很少被分类就是分类不正确。变星总表中还未分类出波江座λ型变星,只有仙后座γ型变星是GCAS和Be星是非GCAS。波江座λ本身也被错误的列为仙王座β型变星[4]。美国变星观测者协会(AAVSO)定义了波江座λ型变星:LERI(Lambda Eridani variable)。包括波江座λ在内,16颗是波江座λ型变星,5颗疑似,13颗与其它类型变星结合在一起[5]。
参考资料
[编辑]- ^ Balona, L. A. Tests of the Pulsation and Starspot Models for the Periodic Be-Stars. Monthly Notices of the Royal Astronomical Society. 1995, 277 (4): 1547. Bibcode:1995MNRAS.277.1547B. doi:10.1093/mnras/277.4.1547
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- ^ Jerzykiewicz, M.; Kopacki, G.; Pigulski, A.; Kołaczkowski, Z.; Kim, S.-L. A CCD Search for Variable Stars of Spectral Type B in the Northern Hemisphere Open Clusters. VIII. NGC 6834. Acta Astronomica. 2011, 61: 247. Bibcode:2011AcA....61..247J. arXiv:1110.4064
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- ^ Carrier, F.; Burki, G.; Burnet, M. Search for duplicity in periodic variable Be stars. Astronomy and Astrophysics. 2002, 385 (2): 488. Bibcode:2002A&A...385..488C. doi:10.1051/0004-6361:20020174
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- ^ 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.
- ^ Otero, S. A.; Watson, C.; Wils, P. Variable Star Type Designations in the VSX. AAVSO Website. American Association of Variable Star Observers. [19 July 2014]. (原始内容存档于2020-04-11).