Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-04-23
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
14 pages, 3 figures, accepted to ApJ Letters
Scientific paper
10.1088/0004-637X/696/2/L137
We present a spectroscopic and photometric analysis of the remarkable massive binary system, BD +36 4063. We argue that the visible ON star is undergoing a rapid mass transfer episode that results in a thick and opaque disk that surrounds and renders invisible its massive companion. A comparison of the projected rotational velocity and the orbital semiamplitude of the visible star indicates a mass ratio near unity. Models for conservative mass transfer show that the equal mass state occurs at the point of minimum separation, and we argue that BD +36 4063 may represent the first system identified at this rapid and rare stage of massive binary evolution.
Gies Douglas R.
Huang Wankang
Matson Rachel A.
Williams Jeffress S.
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