A Large Scale Survey of Molecular Clouds at Nagoya University

Details A Large Scale Survey of Molecular Clouds at Nagoya University A Large Scale Survey of Molecular Clouds at Nagoya University

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999alma.confe..40m&link_type=abstract

Science with the Atacama Large Millimeter Array (ALMA), Associated Universities, Inc., held October 6-8, 1999 at Carnegie Instit

Physics

Galactic, Molecular, Cloud, Co, Nanten, Dense Core

Scientific paper

Large scale 12CO and 13CO (J=1-0) surveys have been carried out by using two 4-m radio telescopes at Nagoya University since 1990 in order to obtain a complete sample of the Galactic molecular clouds. The southern survey started in 1996 with one of the telescopes, named "NANTEN", installed at the Las Campanas Observatory in Chile. The observations made at a grid spacing of 2' - 8' with a 2.'7 beam allow us to identify and resolve the individual star forming dense cores within 1-2 kpc of the sun. The present coverage in the 12CO and 13CO are ~ 7% and ~ 21% of the sky, respectively. The data are used to derive physical parameters of dense cores and to study the mass spectrum, morphology, and conditions for star formation. For example, the survey revealed that the cloud mass function is fairly universal for various regions (e.g., Yonekura et al. 1998, ApJS, 110, 21), and that star forming clouds tend to be characterized by low Mvir/MLTE (e.g., Kawamura et al. 1998, ApJS, 117, 387; Mizuno et al. 1999, PASJ, in press). The survey will provide invaluable database of southern star and planet forming regions, one of the important scientific targets of ALMA.