The distribution of atomic gas and dust in nearby galaxies - III. Radial distributions and metallicity gradients

Thomas, H. C., Alexander, P., Clemens, M. S., Green, D. A., Dunne, Loretta and Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X 2004. The distribution of atomic gas and dust in nearby galaxies - III. Radial distributions and metallicity gradients. Monthly Notices of the Royal Astronomical Society 351 (1) , pp. 362-374. 10.1111/j.1365-2966.2004.07795.x

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Abstract

The radial distribution of dust and gas in 38 nearby galaxies is investigated, using a sample of galaxies for which matched resolution (25 arcsec) neutral hydrogen (H i) and 850-μm images are available. Most of these radial profiles are fitted well by an exponential model, and the derived 850-μm scalelengths are proportional to the H i scalelengths. From this relation, it is found that the metallicity gradients of these galaxies are much shallower than previous studies, unless the dust temperature is constant within the disc, or a significant component of molecular gas exists at large radii that is not traced by CO observations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	galaxies; abundances; ISM; structure; radio lines
Publisher:	Wiley-Blackwell
ISSN:	0035-8711
Last Modified:	24 Oct 2022 11:07
URI:	https://orca.cardiff.ac.uk/id/eprint/47004

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