A cluster of outflows in the Vulpecula Rift
Abstract
We present CO, CO and CO (J=32) observations of a new cluster of outflows in the Vulpecula Rift with HARP-B on the JCMT. The mass associated with the outflows, measured using the CO HARP-B observations and assuming a distance to the region of 2.3 kpc, is 129 \msol{}, while the mass associated with the dense gas from CO observations is 458 \msol{} and the associated sub-millimeter core has a mass of 327 112 \msol{} independently determined from Bolocam 1.1mm data. The outflow-to-core mass ratio is therefore 0.4, making this region one of the most efficient observed thus far with more than an order of magnitude more mass in the outflow than would be expected based on previous results. The kinetic energy associated with the flows, 94 ergs, is enough to drive the turbulence in the local clump, and potentially unbind the local region altogether. The detection of SiO (J=87) emission toward the outflows indicates that the flow is still active, and not simply a fossil flow. We also model the SEDs of the four YSOs associated with the molecular material, finding them all to be of mid to early B spectral type. The energetic nature of the outflows and significant reservoir of cold dust detected in the sub-mm suggest that these intermediate mass YSOs will continue to accrete and become massive, rather than reach the main sequence at their current mass.
Keywords
Cite
@article{arxiv.1109.3598,
title = {A cluster of outflows in the Vulpecula Rift},
author = {J. C. Mottram and C. M. Brunt},
journal= {arXiv preprint arXiv:1109.3598},
year = {2015}
}
Comments
11 pages, 8 figures and 3 tables. Accepted to MNRAS. A higher-resolution version of figure 1 will be included in the published version and is available from the authors upon request. Updated with red and blue wings swapped to match doppler shift