An Atomic and Molecular Study of the Interstellar Medium Around the Supernova Remnant RCW 103

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Contents Vol 23(2)

doi:10.1071/AS06003

An Atomic and Molecular Study of the Interstellar Medium Around the Supernova Remnant RCW 103

Sergio A. Paron ^A ^D, Estela M. Reynoso ^A, Cormac Purcell ^B, Gloria M. Dubner ^A, Anne Green ^C

^A Instituto de Astronomía y Física del Espacio (IAFE), 1428 Buenos Aires, Argentina
^B Department of Astrophysics and Optics, University of New South Wales, Sydney NSW 2052, Australia
^C School of Physics, University of Sydney, Sydney NSW 2006, Australia
^D Correspondence author. E-mail: sparon@iafe.uba.ar





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Publications of the Astronomical Society of Australia 23(2) 69–75 http://dx.doi.org/10.1071/AS06003
Submitted: 10 January 2006 Accepted: 22 March 2006 Published online: 17 May 2006

Abstract

We report on the detection of HCO⁺ and ¹²CO emission in the rotational transition J = 1–0 in the vicinity of the shock front at the southern border of the supernova remnant RCW 103, where previous infrared observations suggest an interaction with a molecular cloud. The observations were carried out with the Australian Millimeter Radiotelescope at Mopra. We observed a depletion of HCO⁺ behind the supernova shock front. In addition, we studied the interstellar medium over an extended region towards RCW 103 based on archival λ 21 cm Hi line observations from the Australia Telescope Compact Array (ATCA) and the Parkes Telescope. No atomic gas was observed in emission in coincidence with the molecular feature. This absence was interpreted in terms of self-absorption processes.

Keywords: ISM: molecules, ISM: clouds, ISM: supernova remnants, supernova remnants: individual (G332.4-0.4, RCW 103)