Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-06-29
Astrophys.J. 614 (2004) 818-826
Astronomy and Astrophysics
Astrophysics
23 pages, 8 figures. Color version of Figure 1 made available in gif format. Accepted 24 June 2004 for publication in the ApJ
Scientific paper
10.1086/423705
We present deep near-infrared (J, H, Ks) images toward an embedded cluster which lies in a C18O clump in the cloud C of the Vela Molecular Ridge. This cluster has at least ~ 350 members and a radius of ~ 0.5 pc. The stellar surface number density is approximately 3000 stars pc^-2 in the central 0.1 pc x 0.1 pc region of the cluster. This is much higher than most of the young clusters within 1 kpc of the Sun. From the comparison of the luminosity function and near-infrared excess fraction with those of other embedded clusters, we estimate that the age of this cluster is approximately 2-3 Myr. This cluster exhibits an excess of brighter stars in its central region, from which we conclude that the more massive stars are located near the cluster center.
Baba Daisuke
Kato Daisuke
Kurita Mikio
Nagashima Chie
Nagata Takahiro
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