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Environmental dependence of SFRs in late-type GAMA galaxies

Published online by Cambridge University Press:  17 August 2012

Meiert W. Grootes
Affiliation:
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany email: meiert.grootes@mpi-hd.mpg.de
Richard J. Tuffs
Affiliation:
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany email: meiert.grootes@mpi-hd.mpg.de
Ellen Andrae
Affiliation:
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany email: meiert.grootes@mpi-hd.mpg.de
Lee S. Kelvin
Affiliation:
School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
Jochen Liske
Affiliation:
European Southern Observatory, Karl-Schwarzshild Str. 2, 85748, Garching, Germany
Barry F. Madore
Affiliation:
Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
Cristina C. Popescu
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK
Aaron S. G. Robotham
Affiliation:
School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
Mark Seibert
Affiliation:
Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
Edward N. Taylor
Affiliation:
Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 206, Australia
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Abstract

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Present and past gas-fuelling of galaxies is expected to depend upon both the properties of the galaxies themselves, as well as their larger-scale environments. In the case of galaxies in groups the environment, i.e the group mass, can be probed by measuring the velocity dispersion of the group members, as done with the GAMA Galaxy Group catalogue (Robotham et al. 2011), probing the halo mass function all the way to small groups. The gas-fuelling rate of normal late-type galaxies can be traced by the SFR under the assumption of a steady state between gas-fuelling and gas-consumption by SF. We present a method to estimate disk opacities from UV/optical photometric characteristics, calibrated using the radiative transfer model of Popescu et al. (2011), applied to UV-Opt-FIR GAMA/H-ATLAS photometry for a subset of GAMA galaxies. We use the method to extract attenuation corrected SFRs for a large sample of late-type GAMA galaxies, which we use in an initial application to constrain the dependency of star formation/gas-fuelling in late-type galaxies on mass of parent DMH, and compactness of galaxy group.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2012

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