Chemically peculiar stars and their temperature calibration
Chemically peculiar stars and their temperature calibration
复制标题
化学奇特恒星及其温度校准
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. Hubrig
中科院分区：
文献类型：
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作者：
M. Netopil;E. Paunzen;H. Maitzen;P. North;S. Hubrig
目标。化学奇异星(CP)的颜色异常，用光度学方法测定其有效温度是一个复杂的任务。对正常恒星的标准校准会导致错误的结果，在大多数情况下需要进行修正。方法：研究方法。为了明确适当的校正，从文献中收集了176个不同亚组对象的直接温度测定。因此，这个样本比以前的研究大得多，因此可以进行更准确的调查，主要是基于平均温度。结果。给出了三种主要测光系统(UBV、GENEVA、STROMREGREN UVBYβ)有效温度的确定方法，并与前人的结果进行了比较。基于汇编的数据，我们提供了证据，证明He(CP4)对象也需要相当大的修正，由于它们的数量很少，在以前的调查中没有注意到。此外，还给出了一个新的辐射热校正值与标准定标结果之间的关系，从而可以推断出磁性CP星的星际红化。
Aims. The determination of effective temperature for chemically peculiar (CP) stars by means of photometry is a sophisticated task due to their abnormal colours. Standard calibrations for normal stars lead to erroneous results and, in most cases corrections are necessary. Methods. In order to specify appropriate corrections, direct temperature determinations for 176 objects of the different subgroups were collected from the literature. This much larger sample than in previous studies therefore allows a more accurate investigation, mostly based on average temperatures. Results. For the three main photometric systems (UBV, Geneva, Stromgren uvbyβ), methods to determine effective temperature are presented together with a comparison with former results. Based on the compiled data we provide evidence that He (CP4) objects also need a considerable correction, not noticed in former investigations due to their small number. Additionally, a new relation for the bolometric correction and the capability of standard calibrations to deduce interstellar reddening for magnetic CP stars are shown.