Low Mass Stars and Brown Dwarfs in Cepheus OB3

Details Low Mass Stars and Brown Dwarfs in Cepheus OB3 Low Mass Stars and Brown Dwarfs in Cepheus OB3

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12..816t&link_type=abstract

The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (2001 July 30 - August

Astronomy and Astrophysics

Astrophysics

Cepheus Ob3

Scientific paper

An initial analysis suggests a surprising dearth of stars below the hydrogen burning threshold in the young unbound OB association, Cepheus OB3b. Evidence has been collected from two deep imaging surveys, covering 1.12 square degrees in the optical (RIcZ) bands, and 0.13 square degrees in the near infra-red (JHKs). The limiting magnitudes are approximately 23.5 in I and 20.0 in J. Suspected cluster members have been selected initially from an I v I-Z colour magnitude diagram. By matching the positions of these sources with the corresponding NIR counterparts, we have completed a catalogue of optical and NIR magnitudes for candidate members of the association. Following individual de-reddening of these stars, masses have been derived from the J magnitudes using model isochrones. Our conclusions are complicated by both incompleteness due to the crowded nature of the region and an apparent age spread.

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