Late-type field stars in the RASS at high galactic latitude

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dc.creatorZickgraf, F. -J.
dc.creatorKrautter, J.
dc.creatorFrink, S.
dc.creatorAlcala, J. M.
dc.creatorMujica, R.
dc.creatorCovino, E.
dc.creatorSterzik, M. F.
dc.date2004-08-12
dc.date.accessioned2026-07-07T02:14:16Z
dc.date.available2026-07-07T02:14:16Z
dc.descriptionWe present results of an investigation on a high-galactic latitude sample of late-type field stars selected from the ROSAT All-Sky Survey (RASS). The sample comprises about 200 G, K, and M stars. Lithium abundances were determined for about 180 G-M stars. Radial velocities were measured for most of the circ. 140 G and K type stars. Combined with proper motions these data were used to study the age distribution and the kinematical properties of the sample. Based on the lithium abundances half of the G-K stars were found to be younger than the Hyades (660 Myr). About 30% are comparable in age to the Pleiades (100 Myr). A small subsample of 10 stars is younger than the Pleiades (100 Myr). They are therefore most likely pre-main sequence stars. Kinematically the PMS and Pleiades-type stars appear to form a group with space velocities close to the Castor moving group but clearly distinct from the Local Association.
dc.description4 pages, 6 figures, to appear in: Proc. 13th Cool Stars Workshop, Hamburg, 5-9 July 2004, F. Favata et al. eds., ESA Special Publications series (ESA SP)
dc.identifierhttps://arxiv.org/abs/astro-ph/0408232
dc.identifierhttp://arxiv.org/abs/astro-ph/0408232
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/8052
dc.subjectAstrophysics
dc.titleLate-type field stars in the RASS at high galactic latitude
dc.typetext

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