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

  • Ellen Andrae (a1), Richard J. Tuffs (a1), Cristina C. Popescu (a2), Mark Seibert (a3) and the GAMA Team...

Abstract

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.

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References

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Driver, S. P., Hill, D. T., Kelvin, L. S., et al. 2011, MNRAS, 413, 971
Driver, S. P., Popescu, C. C., Tuffs, R. J., et al. 2007, MNRAS, 379, 1022
Popescu, C. C. & Tuffs, R. J. 2002, Reviews in Modern Astronomy, 15, 239
Popescu, C. C., Tuffs, R. J., Dopita, M. A., et al. 2011, A&A, 527, A109.
Simard, L., Mendel, J. T., Patton, D. R., et al. 2011, ApJS, 196, 11
Tuffs, R. J., Popescu, C. C., Völk, H. J., et al. 2004, A&A, 419, 821
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