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Probing the opacity of local Universe GAMA galaxies using attenuation-inclination relations

Published online by Cambridge University Press:  17 August 2012

Ellen Andrae
Affiliation:
Max-Planck-Institut für Kernphysik, Heidelberg, Germany email: Ellen.Andrae@mpi-hd.mpg.de
Richard J. Tuffs
Affiliation:
Max-Planck-Institut für Kernphysik, Heidelberg, Germany email: Ellen.Andrae@mpi-hd.mpg.de
Cristina C. Popescu
Affiliation:
Jeremiah Horrocks Institute for Astrophysics and Supercomputing, Preston, UK
Mark Seibert
Affiliation:
Observatories of the Carnegie Institution of Washington, Pasadena, USA
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Abstract

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Even though attenuation by dust strongly attenuates and reddens the UV/optical spectral energy distributions of spiral galaxies, quantifying these effects is challenging, particularly when, as is most often the case, infrared measurements of the absorbed energy are not available. We have initiated a study to model the dependence on inclination of the attenuation of light from galaxies measured in the Galaxy and Mass Assembly (GAMA) survey. We present preliminary results using SDSS galaxies in the phase-I GAMA catalogue, comparing observed attenuation-inclination relations with the predictions of the radiation transfer model of Popescu et al. (2011) to derive a statistical measurement of the mean face-on B-band optical depth of disks τfB in a sample of spiral galaxies complete to the SDSS spectroscopic r-band limit of 17.8 mag.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2012

References

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