The JCMT Legacy Survey of the Gould Belt: a first look at Serpens with HARP
S. F. Graves, J. S. Richer, J. V. Buckle, A. Duarte-Cabral, G. A., Fuller, M. R. Hogerheijde, J. E. Owen, C. Brunt, H. M. Butner, B. Cavanagh,, A. Chrysostomou, E. I. Curtis, C. J. Davis, M. Etxaluze, J. Di Francesco, P., Friberg, R. K. Friesen, J. S. Greaves, J. Hatchell
TL;DR
This study presents initial results from the JCMT Gould Belt Survey on Serpens, analyzing molecular gas dynamics, mass, and outflows, revealing a gravitationally bound cloud with significant outflow activity.
Contribution
First detailed analysis of Serpens using JCMT GBS data, including velocity structure, mass estimation, and outflow identification.
Findings
Serpens cloud mass is 203 solar masses.
The cloud is gravitationally bound.
Outflow kinetic energy is about 70% of turbulence energy.
Abstract
The Gould Belt Legacy Survey (GBS) on the JCMT has observed a region of 260 square arcminutes in 12CO J=3--2 emission, and a 190 square arcminute subset of this in 13CO and C18O towards the Serpens molecular cloud. We examine the global velocity structure of the non-outflowing gas, and calculate excitation temperatures and opacities. The large scale mass and energetics of the region are evaluated, with special consideration for high velocity gas. We find the cloud to have a mass of 203 solar masses, and to be gravitationally bound, and that the kinetic energy of the outflowing gas is approximately seventy percent of the turbulent kinetic energy of the cloud. We identify compact outflows towards some of the submillimetre Class 0/I sources in the region
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