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arXiv 1109.6486astro-ph.SRastro-ph.IM
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从多色测光和Kurucz大气模型--II得到的RR天琴座星的基本参数。适应双模星

Fundamental parameters of RR Lyrae stars from multicolour photometry and Kurucz atmospheric models -- II. Adaptation to double-mode stars

S. Barcza, J. M. Benkő

摘要:

我们的光度流体动力学方法推广到确定多周期径向脉动星的基本参数。本文报道了GSC 4868 - 0831的302个UBV(RI)_C Johnson-Kron-Bronins观测结果。利用这些光度数据和已发表的V372 Ser的光度数据,确定了它们的金属丰度、红化、距离、质量、半径、平衡光度和有效温度。结果强调了使用包括紫外波段在内的多色测光对RR型天琴座星进行适当分类的必要性:我们的U观测结果表明,GSC 4868 - 0831是一颗以两种径向模式脉动的次巨星,V372 Ser是一颗大小和质量与RRd星相当的巨星。

英文摘要:

Our photometric-hydrodynamic method is generalized to determine fundamental parameters of multiperiodic radially pulsating stars. We report 302 UBV(RI)_C Johnson-Kron-Cousins observations of GSC 4868-0831. Using these and published photometric data of V372 Ser, their metallicity, reddening, distance, mass, radius, equilibrium luminosity, effective temperature are determined. The results underline the necessity of using multicolour photometry including an ultraviolet band to classify properly subgroups of RR Lyrae stars: our U observations could reveal that GSC 4868-0831 is a subgiant star pulsating in two radial modes, V372 Ser is a giant star with size and mass of an RRd star.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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