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  Probing star formation and ISM properties using galaxy disk inclination. I. Evolution in disk opacity since z 0.7

Leslie, S. K., Sargent, M. T., Schinnerer, E., Groves, B., van der Wel, A., Zamorani, G., et al. (2018). Probing star formation and ISM properties using galaxy disk inclination. I. Evolution in disk opacity since z 0.7. Astronomy and Astrophysics, 615.

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Leslie, S. K.1, Author
Sargent, M. T.1, Author
Schinnerer, E.1, Author
Groves, B.1, Author
van der Wel, A.1, Author
Zamorani, G.1, Author
Fudamoto, Y.1, Author
Lang, P.1, Author
Smolčić, V.1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: galaxies: evolution opacity galaxies: ISM galaxies: star formation Astrophysics - Astrophysics of Galaxies
 Abstract: Disk galaxies at intermediate redshift (z 0.7) have been found in previous work to display more optically thick behaviour than their local counterparts in the rest-frame B-band surface brightness, suggesting an evolution in dust properties over the past 6 Gyr. We compare the measured luminosities of face-on and edge-on star-forming galaxies at different wavelengths (Ultraviolet (UV), mid-infrared (MIR), far- infrared (FIR), and radio) for two well-matched samples of disk- dominated galaxies: a local Sloan Digital Sky Survey (SDSS)-selected sample at z 0.07 and a sample of disks at z 0.7 drawn from Cosmic Evolution Survey (COSMOS). We have derived correction factors to account for the inclination dependence of the parameters used for sample selection. We find that typical galaxies are transparent at MIR wavelengths at both redshifts, and that the FIR and radio emission is also transparent as expected. However, reduced sensitivity at these wavelengths limits our analysis; we cannot rule out opacity in the FIR or radio. Ultra-violet attenuation has increased between z 0 and z 0.7, with the z 0.7 sample being a factor of 3.4 more attenuated. The larger

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 Dates: 2018
 Publication Status: Issued
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Title: Astronomy and Astrophysics
Source Genre: Journal
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Pages: - Volume / Issue: 615 Sequence Number: - Start / End Page: - Identifier: -