Photometric Identification of the low-Mass Population of Orion OB1b I: The sigma Ori Cluster

Details Photometric Identification of the low-Mass Population of Orion OB1b I: The sigma Ori Cluster Photometric Identification of the low-Mass Population of Orion OB1b I: The sigma Ori Cluster

2004-10-09

arxiv.org/abs/astro-ph/0410244v1

Astron.J.128:2316-2330,2004

Astronomy and Astrophysics

Astrophysics

To be published in AJ

Scientific paper

10.1086/424863

We report an optical photometric survey of 0.89 sq. degrees of the Orion OB1b association centered on sigma Ori. This region includes most of the sigma Ori cluster, the highest density region within Orion OB1b. We have developed a statistical procedure to identify the young, low-mass pre-main sequence population of the association. We estimate that the cluster has ~160 members in the mass range (0.2

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