The Pre-Main-Sequence Stars and Initial Mass Function of NGC 2264

Details The Pre-Main-Sequence Stars and Initial Mass Function of NGC 2264 The Pre-Main-Sequence Stars and Initial Mass Function of NGC 2264

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....120..894p&link_type=abstract

The Astronomical Journal, Volume 120, Issue 2, pp. 894-908.

Astronomy and Astrophysics

Astronomy

51

Galaxy: Open Clusters And Associations: Individual: Ngc Number: Ngc 2264, Stars: Pre-Main-Sequence

Scientific paper

UBVRI and Hα CCD photometry has been performed in the southern region of NGC 2264 around the Cone Nebula. A nearly complete list of pre-main-sequence (PMS) members in the cluster has been made from the compilation of Hα emission stars identified in this study plus those selected in previous investigations, together with stars with X-ray emission. Using the H-R diagram, we tested a set of four PMS evolution models based on the PMS age and age spread estimate for the cluster and the mass-age relationship among individual stars. The resultant initial mass function (IMF) is in good agreement with the field star IMF of the solar neighborhood, with an IMF slope Γ=-1.7 in the mass range 0.3<=logm<=0.8.

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