The opacity of galactic disks at z ~ 0.7
- Sargent, M. T.
- Carollo, C. M.
- Kampczyk, P.
- Lilly, S. J.
- Scarlata, C.
- Capak, P.
- Ilbert, O.
- Koekemoer, A. M.
- Kneib, J. P.
- Leauthaud, A.
- Massey, R.
- Oesch, P. A.
- Rhodes, J.
- Schinnerer, E.
- Scoville, N.
- Taniguchi, Y.
DOIAbstract
We compare the surface brightness-inclination relation for a sample of COSMOS pure disk galaxies at z ~ 0.7 with an artificially redshifted sample of Sloan Digital Sky Survey (SDSS) disks well matched to the COSMOS sample in terms of rest-frame photometry and morphology, as well as their selection and analysis. The offset between the average surface brightness of face-on and edge-on disks in the redshifted SDSS sample matches that predicted by measurements of the optical depth of galactic disks in the nearby universe. In contrast, large disks at z ~ 0.7 have a virtually flat surface brightness-inclination relation, suggesting that they are more opaque than their local counterparts. This could be explained by either an increased amount of op...
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