Roussel, H;
Wilson, CD;
Vigroux, L;
Isaak, KG;
Sauvage, M;
Madden, SC;
Auld, R;
... Zeilinger, WW; + view all
(2010)
SPIRE imaging of M82: Cool dust in the wind and tidal streams.
Astronomy & Astrophysics
, 518
, Article L66. 10.1051/0004-6361/201014567.
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Abstract
M 82 is a unique representative of a whole class of galaxies, starbursts with superwinds, in the Very Nearby Galaxy Survey with Herschel. In addition, its interaction with the M 81 group has stripped a significant portion of its interstellar medium from its disk. SPIRE maps now afford better characterization of the far-infrared emission from cool dust outside the disk, and sketch a far more complete picture of its mass distribution and energetics than previously possible. They show emission coincident in projection with the starburst wind and in a large halo, much more extended than the PAH band emission seen with Spitzer. Some complex substructures coincide with the brightest PAH filaments, and others with tidal streams seen in atomic hydrogen. We subtract the far-infrared emission of the starburst and underlying disk from the maps, and derive spatially-resolved far-infrared colors for the wind and halo. We interpret the results in terms of dust mass, dust temperature, and global physical conditions. In particular, we examine variations in the dust physical properties as a function of distance from the center and the wind polar axis, and conclude that more than two thirds of the extraplanar dust has been removed by tidal interaction, and not entrained by the starburst wind.
| Type: | Article |
|---|---|
| Title: | SPIRE imaging of M82: Cool dust in the wind and tidal streams |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201014567 |
| Publisher version: | https://doi.org/10.1051/0004-6361/201014567 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | dust, extinction / evolution / galaxies: interactions / galaxies: starburst / infrared: ISM |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10095315 |
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