Radial distribution of gas and dust in spiral galaxies

Autor(en)

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

Abstrakt

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(en)

Institut für Publizistik- und Kommunikationswissenschaft, Institut für Mathematik, Institut für Astrophysik

Externe Organisation(en)

Cardiff University, Aix-Marseille Université, Imperial College London, Ghent University , California Institute of Technology (Caltech), Instituto de Astrofísica de Canarias (IAC), Université Paris Saclay, Université Paris VI - Pierre-et-Marie-Curie, University of California, Irvine, National Aeronautics & Space Administration (NASA), University of Colorado, Boulder, European Space Research & Technology Centre (ESA/ESTEC), University of Sussex, University College London, McMaster University, University of Nottingham, Instituto Nazionale die Astrofisica (INAF), University of Hertfordshire, Università degli Studi di Padova, Université de Strasbourg, The Royal Observatory, Edinburgh

Journal

Astronomy and Astrophysics

Band

518

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/201014554

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/210f8f6b-8905-4f55-a841-156fedf1727b