Journal
ASTROPHYSICAL JOURNAL
Volume 640, Issue 1, Pages L63-L66Publisher
IOP PUBLISHING LTD
DOI: 10.1086/503158
Keywords
binaries : general; stars : formation
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In this Letter I compare recent findings suggesting a low binary star fraction for late-type stars with knowledge concerning the forms of the stellar initial and present-day mass functions for masses down to the hydrogen-burning limit. This comparison indicates that most stellar systems formed in the Galaxy are likely single and not binary, as has been often asserted. Indeed, in the current epoch two-thirds of all main-sequence stellar systems in the Galactic disk are composed of single stars. Some implications of this realization for understanding the star and planet formation process are briefly mentioned.
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