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The Volume-limited A-Star (VAST) survey - I. Companions and the unexpected X-ray detection of B6-A7 stars

De Rosa, R. J; Bulger, J; Patience, J; Leland, B; Macintosh, B A; Schneider, A; Song, I; Marois, C; Graham, J; Bessell, Michael; Doyon, R


With an adaptive optics imaging survey of 148 B6-A7 stars, we have tested the hypothesis that unresolved lower mass companions are the source of the unexpected X-ray detections of stars in this spectral type range. The sample is composed of 63 stars detected in X-rays within the ROSAT All Sky Survey and 85 stars that form a control sample; both subsets have the same restricted distribution of spectral type, age, X-ray sensitivity and separation coverage. A total of 68 companion candidates are...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1111/j.1365-2966.2011.18765.x
Access Rights: Open Access


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