A Renaissance study of Am stars I. The mass ratio distribution
A Renaissance study of Am stars I. The mass ratio distribution
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Am 恒星的文艺复兴研究 I. 质量比分布
DOI:
10.1051/0004-6361/201015529
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发表时间:
2010
影响因子:
6.5
通讯作者:
H. Boffin
中科院分区:
文献类型:
--
作者:
H. Boffin
Aims. Triggered by the study of Carquillat & Prieur (2007, MNRAS, 380, 1064) of Am binaries, I reanalyse their sample of 60 orbits to derive the mass ratio distribution (MRD), assuming as they did a priori functional forms, i.e. a power law or a Gaussian. The sample is then extended using orbits published by several groups and a full analysis of the MRD is made, without any assumption on the functional form. Methods. I derive the MRD using a Richardson-Lucy inversion method, assuming a fixed mass of the Am primary and randomly distributed orbital inclinations. Using the large sub-sample of double-lined spectroscopic binaries, I show that this methodology is indeed perfectly adequate. Results. I first derive new parameters of the functional form for the Carquillat & Prieur sample. Using the inversion method, applied to my extended sample of 162 systems, I find that the final MRD can be approximated by a uniform distribution.