X-ray emission from Lindroos binary systems

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dc.creatorHuelamo, N.
dc.creatorNeuhaeuser, R.
dc.creatorStelzer, B.
dc.creatorSupper, R.
dc.creatorZinnecker, H.
dc.date2000-05-17
dc.date.accessioned2026-07-07T01:53:36Z
dc.date.available2026-07-07T01:53:36Z
dc.descriptionWe present a study of the X-ray emission from binary systems extracted from the Lindroos catalogue (Lindroos 1986) based on the ROSAT All-Sky survey as well as ROSAT PSPC and HRI pointings. The studied sample consists of visual binary systems comprised of early-type primaries and late-type secondaries. The ages of the systems were determined by Lindroos (1985) from uvbybeta photometry of the primaries. These ages range between 33 and 135 Myr, so if the late-type secondaries are physically bound to the early-type primaries, they could be Post-T Tauri stars (PTTS). We have found strong X-ray emission from several secondaries. This fact together with their optical and IR data, make them bona fide PTTS candidates. We have also detected X-ray emission from several early-type primaries and, in particular, from most of the late-B type stars. Because their HRI hardness ratios are similar to those from resolved late-type stars, the presence of an unresolved late-type companion seems to be the cause of this emission.
dc.description17 pages, 6 figures, accepted by A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0005348
dc.identifierhttp://arxiv.org/abs/astro-ph/0005348
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1025
dc.subjectAstrophysics
dc.titleX-ray emission from Lindroos binary systems
dc.typetext

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