Radial distribution of gas and dust in spiral galaxies
- Author(s)
- M. Pohlen, L. Cortese, M. W.L. Smith, S. A. Eales, A. Boselli, G. J. Bendo, H. L. Gomez, A. Papageorgiou, R. Auld, M. Baes, J. J. Bock, M. Bradford, V. Buat, N. Castro-Rodriguez, P. Chanial, S. Charlot, L. Ciesla, D. L. Clements, A. Cooray, D. Cormier, E. Dwek, S. A. Eales, D. Elbaz, M. Galametz, F. Galliano, W. K. Gear, J. Glenn, M. Griffin, S. Hony, K. G. Isaak, L. R. Levenson, N. Lu, S. Madden, B. O'Halloran, K. Okumura, S. Oliver, M. J. Page, P. Panuzzo, T. J. Parkin, I. Perez-Fournon, N. Rangwala, E. E. Rigby, H. Roussel, A. Rykala, N. Sacchi, M. Sauvage, B. Schulz, M. R.P. Schirm, M. W.L. Smith, L. Spinoglio, J. A. Stevens, S. Srinivasan, M. Symeonidis, M. Trichas, M. Vaccari, L. Vigroux, H. Wozniak, G. S. Wright, W. W. Zeilinger
- Abstract
By combining Herschel-SPIRE data with archival Spitzer, H i, and CO maps, we investigate the spatial distribution of gas and dust in the two famous grand-design spirals M 99 and M 100 in the Virgo cluster. Thanks to the unique resolution and sensitivity of the Herschel-SPIRE photometer, we are for the first time able to measure the distribution and extent of cool, submillimetre (submm)-emitting dust inside and beyond the optical radius. We compare this with the radial variation in both the gas mass and the metallicity. Although we adopt a model-independent, phenomenological approach, our analysis provides important insights. We find the dust extending to at least the optical radius of the galaxy and showing breaks in its radial profiles at similar positions as the stellar distribution. The colour indices f350/f500 and f250/f350 decrease radially consistent with the temperature decreasing with radius. We also find evidence of an increasing gas to dust ratio with radius in the outer regions of both galaxies.
- Organisation(s)
- Department of Communication, Department of Mathematics, Department of Astrophysics
- External organisation(s)
- Cardiff University, Aix-Marseille Université, Imperial College London, Ghent University , California Institute of Technology (Caltech), Institute of Astrophysics of the Canary Islands, Université Paris Saclay, Université Paris VI - Pierre-et-Marie-Curie, University of California, Irvine, National Aeronautics & Space Administration (NASA), University of Colorado, Boulder, Science and Operations Department - Science Division (SCI-SC), University of Sussex, University College London, McMaster University, University of Nottingham, Instituto Nazionale die Astrofisica (INAF), University of Hertfordshire, University of Padova, Université de Strasbourg, The Royal Observatory, Edinburgh
- Journal
- Astronomy and Astrophysics
- Volume
- 518
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361/201014554
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/210f8f6b-8905-4f55-a841-156fedf1727b