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The 2.35 year itch of cygnus OB2 #9: I. Optical and X-ray monitoring

Naze, Y; Mahy, L; Damerdji, Y; Kobulnicky, H A; Pittard, J M; Parkin, Elliott; Absil, O; Blomme, R

Description

Context. Nonthermal radio emission in massive stars is expected to arise in wind-wind collisions occurring inside a binary system. One such case, the O-type star Cyg OB2 #9, was proven to be a binary only four years ago, but the orbital parameters remained uncertain. The periastron passage of 2011 was the first one to be observable under good conditions since the discovery of binarity. Aims. In this context, we have organized a large monitoring campaign to refine the orbital solution and to...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/67103
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201219442

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