Stock 2 CCD photometry and proper motions (Foster+, 2000)

Details Stock 2 CCD photometry and proper motions (Foster+, 2000) Stock 2 CCD photometry and proper motions (Foster+, 2000)

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..41430409f&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/143/409. Originally published in: 2000A&AS..143..409F

Mathematics

Probability

Clusters: Open, Stars: Late-Type, Photometry: Ccd, Photometry: Ubvri, Proper Motions

Scientific paper

We present the results of the first CCD BVRI photometric and proper motion study of late-type stars in the young open cluster Stock 2. Twenty-one fields of approximately 5'x5' size have been observed photometrically, from which we have identified 118 candidate members based on their positions on colour-magnitude diagrams relative to theoretical isochrones. From a comparison of the known star density of the Pleiades, we estimate the contamination of this selection process due to background stars to be as large as ~50%. However, only 22 of those 118 candidate members have proper motions consistent with membership, suggesting that the contamination is of the order of 80%. Additional candidate members were found by means of a proper motion analysis of Schmidt plate material for a 3°x3° field containing the cluster. The cluster proper motion allows us to separate members from background and foreground stars. We have found 634 stars with a membership probability >=50% down to a limiting magnitude of B=~20, corresponding to late-M dwarfs at the distance of Stock 2. (2 data files).

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