SPIRE imaging of M 82: Cool dust in the wind and tidal streams

Author(s)

Helene Roussel, Michael J. Barlow, Laurent Vigroux, Kate Isaak, Marc Sauvage, Suzanne Madden, Robbie Auld, Maarten Baes, George J. Bendo, J.J. Bock, Alessandro Boselli, M Bradford, Veronique Buat, Norberto Castro-Rodriguez, Pierre .F. Chanial, Stéphane Charlot, Laure Ciesla, David L. Clements, Asantha R. Cooray, Diane Cormier, Luca Cortese, Jonathan I Davies, Eli L I Dwek, Steve A. Eales, David Elbaz, Maud Galametz, Frederic Galliano, Walter K Gear, Jason Glenn, Haley L. Gomez, Matt J. Griffin, Sacha Hony, Louis R. Levenson, N Lu, Brian O'Halloran, K Okumura, Seb Oliver, Mathew J. Page, Pasquale Panuzzo, A Papageorgiou, T.J. Parkin, Ismael Perez-Fournon, Michael Pohlen, Naseem Rangwala, Emma E. Rigby, Adam Rykala, Nicola Sacchi, Bernhard Schulz, M.R.P. Schirm, Matthew W. L. Smith, Luigi Spinoglio, Jason A. Stevens, S Srinivasan, Myrto Symeonidis, Markos Trichas, Mattia Vaccari, Herve Wozniak, Gillian Wright, Werner Zeilinger

Abstract

M82 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 M81 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.

Organisation(s)

Department of Astrophysics

External organisation(s)

Université Paris XI - Paris-Sud, McMaster University, Université Paris VI - Pierre-et-Marie-Curie, Cardiff University, French Alternative Energies and Atomic Energy Commission (CEA), Université Paris VII - Paris-Diderot, Ghent University , Imperial College London, California Institute of Technology (Caltech), Université de Provence Aix-Marseille I, Institute of Astrophysics of the Canary Islands, University of California, Irvine, National Aeronautics & Space Administration (NASA), University of Colorado, Boulder, University of Sussex, University College London, University of Nottingham, INAF - Osservatorio Astrofisico di Arcetri, Istituto di Fisica dello Spazio Interplanetario, University of Hertfordshire, University of Padova, Centre de Recherche Astronomique de Lyon, UK Astronomy Technology Centre

Journal

Astronomy & Astrophysics

Volume

518

No. of pages

5

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/201014567

Publication date

2010

Peer reviewed

Yes

Austrian Fields of Science 2012

1030 Physics, Astronomy

Portal url

https://ucrisportal.univie.ac.at/en/publications/5436f52c-65f0-498c-abf3-c5867f424580