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EDP Sciences, Astronomy & Astrophysics, (518), p. L62, 2010

DOI: 10.1051/0004-6361/201014536

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Mapping the interstellar medium in galaxies withHerschel/SPIRE

Journal article published in 2010 by S. A. Eales, M. W. L. Smith, C. D. Wilson, G. J. Bendo, L. Cortese, M. Pohlen, A. Boselli, H. L. Gomez, R. Auld, M. Baes ORCID, M. J. Barlow, J. J. Bock, M. Bradford, V. Buat, N. Castro-Rodríguez and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The standard method of mapping the interstellar medium in a galaxy, by observing the molecular gas in the CO 1-0 line and the atomic gas in the 21-cm line, is largely limited with current telescopes to galaxies in the nearby universe. In this letter, we use SPIRE observations of the galaxies M99 and M100 to explore the alternative approach of mapping the interstellar medium using the continuum emission from the dust. We have compared the methods by measuring the relationship between the star-formation rate and the surface density of gas in the galaxies using both methods. We find the two methods give relationships with a similar dispersion, confirming that observing the continuum emission from the dust is a promising method of mapping the interstellar medium in galaxies.