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Ionization driven molecular outflow in K3-50A

Klaassen, PD and Galvan-Madrid, R and Peters, T and Longmore, SN and Maercker, M (2013) Ionization driven molecular outflow in K3-50A. Astronomy and Astrophysics, 556. ISSN 0004-6361

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Abstract

Whether high mass stars continue to accrete material beyond the formation of an HII region is still an open question. Ionized infall and outflow have been seen in some sources, but their ties to the surrounding molecular gas are not well constrained. We aim to quantify the ionized and molecular gas dynamics in a high mass star forming region (K3-50A) and their interaction. We present CARMA observations of the 3mm continuum, H41\alpha, and HCO+ emission, and VLA continuum observations at 23 GHz and 14.7 GHz to quantify the gas and its dynamics in K3-50A. We find large scale dynamics consistent with previous observations. On small scales, we find evidence for interaction between the ionized and molecular gas which suggests the ionized outflow is entraining the molecular one. This is the first time such an outflow entrained by photo ionized gas has been observed. Accretion may be ongoing in K3-50A because an ionized bipolar outflow is still being powered, which is in turn entraining part of the surrounding molecular gas. This outflow scenario is similar to that predicted by ionization feedback models.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: EDP Sciences
Related URLs:
Date Deposited: 08 Jun 2016 11:13
Last Modified: 08 Jun 2016 11:13
DOI or Identification number: 10.1051/0004-6361/201219683
URI: http://researchonline.ljmu.ac.uk/id/eprint/3734

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