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Deep submillimeter images of NGC 891-cold dust at larger galactic radii

Alton, P. B., Bianchi, S., Rand, R. J., Xilouris, E. M., Davies, Jonathan Ivor and Trewhella, M. 1998. Deep submillimeter images of NGC 891-cold dust at larger galactic radii. Astrophysical Journal 507 (2) , L125-L129. 10.1086/311692

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We present images in the 450 and 850 μm continuum of the edge-on galaxy NGC 891. These measurements, carried out with the recently commissioned Submillimeter Common-User Bolometer Array, provide the deepest images yet of a nearby galaxy in the submillimeter wave band. We detect dust emission from 2/3 of the optical disk and confirm the presence of dust chimneys escaping from the main absorption layer up to z-heights of nearly 2 kpc. A comparison between the submillimeter surface brightness along the major axis with that corresponding to the IRAS 60 and 100 μm filters implies that large amounts of cold dust (~15 K) are present in the disk (in fact, an order of magnitude more grain material than the warm dust detected by IRAS). These cold grains predominate at larger galactic radii.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: dust, extinction—galaxies: individual (NGC 891)—galaxies: ISM—galaxies: spiral— infrared: galaxies
Publisher: IOP Science
ISSN: 0004-637X
Last Modified: 04 Jun 2017 04:24

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