Radial velocities of early-type stars in the Perseus OB2 association

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dc.creatorSteenbrugge, K. C.
dc.creatorde Bruijne, J. H. J.
dc.creatorHoogerwerf, R.
dc.creatorde Zeeuw, P. T.
dc.date2003-02-20
dc.date2003-02-21
dc.date.accessioned2026-07-07T10:47:36Z
dc.date.available2026-07-07T10:47:36Z
dc.descriptionWe present radial velocities for 29 B- and A-type stars in the field of the nearby association Perseus OB2. The velocities are derived from spectra obtained with AURELIE, via cross correlation with radial velocity standards matched as closely as possible in spectral type. The resulting accuracy is ~2 - 3 km s$^{-1}$. We use these measurements, together with published values for a few other early-type stars, to study membership of the association. The mean radial velocity (and measured velocity dispersion) of Per OB2 is 23.5 \pm 3.9 km s$^{-1}$, and lies ~15 km s$^{-1}$ away from the mean velocity of the local disk field stars. We identify a number of interlopers in the list of possible late-B- and A-type members which was based on Hipparcos parallaxes and proper motions, and discuss the colour-magnitude diagram of the association.
dc.description20 pages, 9 figures, accepted for publication in A&A, minor revisions
dc.identifierhttps://arxiv.org/abs/astro-ph/0302428
dc.identifierhttp://arxiv.org/abs/astro-ph/0302428
dc.identifierAstron.Astrophys.402:587-606,2003
dc.identifierdoi:10.1051/0004-6361:20030277
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183587
dc.subjectAstrophysics
dc.titleRadial velocities of early-type stars in the Perseus OB2 association
dc.typetext

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