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SCUBA imaging of the NGC 7331 dust ring

Bianchi, S., Alton, P. B., Davies, Jonathan Ivor and Trewhella, M. 1998. SCUBA imaging of the NGC 7331 dust ring. Monthly Notices of the Royal Astronomical Society 298 (3) , L49-L53. 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).

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: dust; extinction; galaxies: individual: NGC 7331; galaxies: ISM; galaxies: structure
Publisher: Wiley
ISSN: 0035-8711
Last Modified: 04 Jun 2017 04:24

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