Finding binary star fractions in any distribution
Finding binary star fractions in any distribution
复制标题
寻找任意分布中的双星分数
DOI:
10.1093/mnras/stz1939
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发表时间:
2019
影响因子:
4.8
通讯作者:
Akter S
中科院分区:
文献类型:
--
作者:
Akter S
Candidate visual binary systems are often found by identifying two stars that are closer together than would be expected by chance. However, in regions with non-trivial density distributions, the ‘random’ distances between stars varies because of the background distribution, as well as the presence of binaries. We show that when no binaries are present, the distribution of the ratios of the distances to the nearest and tenth nearest neighbours,d1/d10, is always well approximated by a Gaussian with mean 0.2–0.3 and variance 0.16–0.19 for any underlying density distribution. The introduction of binaries causes some (or all) nearest neighbours to become closer than expected by random chance, introducing a component to the distribution whered1/d10is much lower than expected. We show how a simple single or double Gaussian fit to the distribution ofd1/d10can be used to find the binary fraction in any underlying density distribution quickly and simply.
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影响因子:
3.2
作者:
V. Mannings;A. Boss;S. Russell
通讯作者:
V. Mannings;A. Boss;S. Russell
DOI:
--
发表时间:
--
期刊:
Philosophical Transactions of the Royal Society of London
影响因子:
--
作者:
J. Michell
通讯作者:
J. Michell
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
van der Pieter Kruit;K. Freeman
通讯作者:
K. Freeman
DOI:
--
发表时间:
2009
期刊:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
S. Goodwin
通讯作者:
S. Goodwin