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The HerschelSpace Observatory view of dust in M81

Authors :
Bendo, G. J.
Wilson, C. D.
Pohlen, M.
Sauvage, M.
Auld, R.
Baes, M.
Barlow, M. J.
Bock, J. J.
Boselli, A.
Bradford, M.
Buat, V.
Castro-Rodriguez, N.
Chanial, P.
Charlot, S.
Ciesla, L.
Clements, D. L.
Cooray, A.
Cormier, D.
Cortese, L.
Davies, J. I.
Dwek, E.
Eales, S. A.
Elbaz, D.
Galametz, M.
Galliano, F.
Gear, W. K.
Glenn, J.
Gomez, H. L.
Griffin, M.
Hony, S.
Isaak, K. G.
Levenson, L. R.
Lu, N.
Madden, S.
O'Halloran, B.
Okumura, K.
Oliver, S.
Page, M. J.
Panuzzo, P.
Papageorgiou, A.
Parkin, T. J.
Perez-Fournon, I.
Rangwala, N.
Rigby, E. E.
Roussel, H.
Rykala, A.
Sacchi, N.
Schulz, B.
Schirm, M. R. P.
Smith, M. W. L.
Spinoglio, L.
Stevens, J. A.
Sundar, S.
Symeonidis, M.
Trichas, M.
Vaccari, M.
Vigroux, L.
Wozniak, H.
Wright, G. S.
Zeilinger, W. W.
Source :
Astronomy and Astrophysics; July 2010, Vol. 518 Issue: 10
Publication Year :
2010

Abstract

We use HerschelSpace Observatory data to place observational constraints on the peak and Rayleigh-Jeans slope of dust emission observed at 70–500 μm in the nearby spiral galaxy M81. We find that the ratios of wave bands between 160 and 500 μm are primarily dependent on radius but that the ratio of 70 to 160 μm emission shows no clear dependence on surface brightness or radius. These results along with analyses of the spectral energy distributions imply that the 160–500 μm emission traces 15–30 K dust heated by evolved stars in the bulge and disc whereas the 70 μm emission includes dust heated by the active galactic nucleus and young stars in star forming regions.

Details

Language :
English
ISSN :
00046361 and 14320746
Volume :
518
Issue :
10
Database :
Supplemental Index
Journal :
Astronomy and Astrophysics
Publication Type :
Periodical
Accession number :
ejs21782997

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