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- W2061752671 abstract "It has recently been suggested that, in the field, $sim!!56%$ of Sun-like stars ($0.8,{rm M}_{_odot}lesssim M_starlesssim 1.2,{rm M}_{_odot}$) are single. We argue here that this suggestion may be incorrect, since it appears to be based on the multiplicity frequency of systems with Sun-like primaries, and therefore takes no account of Sun-like stars that are secondary (or higher-order) components in multiple systems. When these components are included in the reckoning, it seems likely that only $sim!46%$ of Sun-like stars are single. This estimate is based on a model in which the system mass function has the form proposed by Chabrier, with a power-law Salpeter extension to high masses; there is a flat distribution of mass ratios; and the probability that a system of mass $M$ is a binary is $,0.50 + 0.46log_{_{10}}!left(M/{rm M}_{_odot}right),$ for $,0.08,{rm M}_{_odot}leq Mleq 12.5,{rm M}_{_odot}$, $,0,$ for $,M<0.08,{rm M}_{_odot}$, and $,1,$ for $,M>12.5,{rm M}_{_odot}$. The constants in this last relation are chosen so that the model also reproduces the observed variation of multiplicity frequency with primary mass. However, the more qualitative conclusion, that a minority of Sun-like stars are single, holds up for virtually all reasonable values of the model parameters. Parenthetically, it is still likely that the majority of {it all} stars in the field are single, but that is because most M Dwarfs probably are single." @default.
- W2061752671 created "2016-06-24" @default.
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- W2061752671 date "2015-02-17" @default.
- W2061752671 modified "2023-09-23" @default.
- W2061752671 title "Are the majority of Sun-like stars single?" @default.
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- W2061752671 doi "https://doi.org/10.1093/mnras/stv093" @default.
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