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SCUBA imaging of the NGC 7331 dust ring

Bianchi, S. and Alton, P. B. and Davies, J. I. and Trewhella, M. (1998) SCUBA imaging of the NGC 7331 dust ring. Monthly Notices of the Royal Astronomical Society, 298 (3). L49-L53. ISSN 0035-8711. doi:10.1046/j.1365-8711.1998.01929.x.

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We present observations of the spiral galaxy NGC 7331 using the Submillimetre Common User Bolometer Array (SCUBA) on the James Clark Maxwell Telescope. We have detected a dust ring of 45 arcsec radius (3.3 kpc) at wavelengths of 450 and 850 μm. The dust ring is in good correspondence with other observations of the ring in the mid-infrared (MIR), CO and radio continuum, suggesting that the observed dust is associated with molecular gas and star formation. A B − K colour map shows an analogous ring structure with an asymmetry about the major axis, consistent with the extinction being produced by a dust ring. The derived temperature of the dust lies between 16 and 31 K and the gas-to-dust ratio lies between 150 and 570, depending on the assumed dust emission efficiency index (β = 1.5 or 2).

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Bianchi, S.0000-0002-4622-4240
Additional Information:© 1998 RAS. Accepted 1998 June 17. Received 1998 June 12; in original form 1998 April 24. We are grateful to Iain Coulson at JCMT for his help and support during observations and data reduction. It is also a pleasure to thank Beverly Smith for providing us with KAO data, Manolis Xilouris for the B-band image and Harley Thronson for help with the K-band data. This paper was based on observations at the James Clerk Maxwell Telescope. JCMT is operated by the Joint Astronomy Centre on behalf of the Particle Physics and Astronomy Research Council of the United Kingdom, the Netherlands Organization for Scientific Research and the National Research Council of Canada.
Group:Infrared Processing and Analysis Center (IPAC)
Subject Keywords:dust, extinction, galaxies: individual: NGC 7331, galaxies: ISM, galaxies: structure
Issue or Number:3
Record Number:CaltechAUTHORS:20180418-153910063
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Official Citation:S. Bianchi, P. B. Alton, J. I. Davies, M. Trewhella; SCUBA imaging of the NGC 7331 dust ring, Monthly Notices of the Royal Astronomical Society, Volume 298, Issue 3, 11 August 1998, Pages L49–L53,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85952
Deposited By: George Porter
Deposited On:19 Apr 2018 18:15
Last Modified:15 Nov 2021 20:34

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