IAU Symposium Abstract S186-021P


A near infrared survey of the Large Magellanic Cloud


T. Wada1, T.Ebisuzaki2, Y.Ohno2, and M. Ueno1
1 Dept. of Earth Science and Astronomy, Univ. of Tokyo, Japan
< wada@chianti.c.u-tokyo.ac.jp >
< ueno@chianti.c.u-tokyo.ac.jp >
2 Computational Science Lab., The Institute of Physical and Chemical Research, Japan
< ebisu@atlas.riken.go.jp >
< ohno@atlas.riken.go.jp >



We conducted a regional survey of the Large Magellanic Cloud (LMC) with a near infrared camera with angular resolution of 10" at the J(1.25 um), H(1.65 um) and K'(2.15 um) band. The limiting magnitudes of the survey were 13.6, 11.9, and 10.0 magnitude (3 sigma) at the J, H, and K' band, respectively. The position and the magnitudes at the J, H and K' bands have been derived for 1599 point sources. The dominant components of the sources are red super giants (RSG), luminous M type giants and AGB stars in the LMC. The distributions of RSG candidates, luminous giant candidates and CO line flux are spatially different from each other. This fact supports that the position of active star forming region has changed in the recent 108 years. The detected sources are cross-identified with IRAS Point Source Catalog and the spectrum energy distribution from 1.25 um to 100 um are derived. Sixty-two of 680 IRAS sources in the region coincided with the detected sources. The half of them are well described by the black body spectrum, though the others show flat or redder spectrum. These source are supposed to be stars with dust envelop.