Alpha Per cluster low-mass members. II. (Prosser+, 1998)

Details Alpha Per cluster low-mass members. II. (Prosser+, 1998) Alpha Per cluster low-mass members. II. (Prosser+, 1998)

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycatp001031902p&link_type=abstract

VizieR On-line Data Catalog: J/other/AN/319.215. Originally published in: 1998AN....319..215P

Other

Clusters: Open, Photometry, X-Ray Sources

Scientific paper

The present investigation examines possible optical counterparts to 130 X-ray sources in the region of the alpha Persei open cluster (d~170pc, age~50Myr) resulting from the analysis of three 22-25ksec ROSAT PSPC pointings. In the same manner as for 73 X-ray sources from a raster survey in alpha Per (Prosser & Randich, 1998, Cat. ), CCD photometry is employed to obtain magnitudes and colors for stars/objects close to the X-ray positions, with additional echelle and low-dispersion Halpha spectra provided for some stars. For almost 60 X-ray sources, an optical counterpart with photometry acceptable for cluster membership is identified, some of which can be excluded from membership on the basis of discrepant radial velocity or X-ray characteristics. On the order of 30 new members or likely members associated with X-ray sources have been identified based on available data. A photometric rotation period has been obtained for one rapid rotator identified in X-rays.
(5 data files).

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