Using 2MASS to detect main sequence companions to subdwarf B stars

Abstract

We explore the binary fraction of subdwarf B (sdB) stars by using the Two Micron All Sky Survey to search for main sequence companions. We have convolved Kurucz models with appropriate filter bandpasses to examine how various combinations separate single sdB stars from sdB+MS binaries. We notice that the 2MASS magnitude limits greatly increase the fraction of inferred sdB+MS binaries and examine a magnitude-limited sample appropriate for single sdB stars.

Document Type

Article

DOI

https://doi.org/10.1023/B:ASTR.0000044339.17680.80

Keywords

multicolor photometry

Publication Date

10-25-2004

Journal Title

Astrophysics and Space Science

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