The Open UniversitySkip to content
 

CO and CI observations of shock excited gas in IC443C

White, Glenn J. (1994). CO and CI observations of shock excited gas in IC443C. Astronomy and Astrophysics, 283 L25-L28.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (445Kb)
URL: http://cdsads.u-strasbg.fr/abs/1994A%26A...283L..2...
Google Scholar: Look up in Google Scholar

Abstract

The blast-wave at the edge of the supernova remnant IC443 is colliding with nearby quiescent gas. In this paper a multi-transition study of CO J = 1 - 0 → J = 4 - 3 is presented of one of these clouds, IC443C, and the detection of atomic carbon, CI, reported. The CO is optically thin with Tex ~ 45K, a measured isotopic ratio CO/13CO = 80, and N(CO) ~ 2 - 4 1017. Atomic carbon emission was detected for the first time in shocked gas only towards the IC443C C-shocked region, with an abundance ratio CI/CO ~ 1.3 - 2.9. CI is overabundant by one order of magnitude compared with quiescent molecular cloud cores, suggesting that shock(s), or an enhanced cosmic ray flux density, has increased the CI/CO ratio. A narrow CO absorption line towards the shocked region IC443G has Tex ~ 13-18K, and nH2 ~ 2-3 103 cm-3, which may be typical of conditions in the pre-shock gas.

Item Type: Journal Article
Copyright Holders: 1994 European Southern Observatory
ISSN: 1432-0746
Keywords: interstellar medium; abundances; clouds; IC443
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 32721
Depositing User: Glenn White
Date Deposited: 20 Feb 2012 14:19
Last Modified: 05 Apr 2013 17:21
URI: http://oro.open.ac.uk/id/eprint/32721
Share this page:

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk