Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-11-04
Astronomy and Astrophysics
Astrophysics
To appear in the Astrophysical Journal. 14 AAS preprint style pages plus 7 figures
Scientific paper
10.1086/303819
We present images from the Ultraviolet Imaging Telescope of the Abell 1795 cluster of galaxies. We compare the cD galaxy morphology and photometry of these data with those from existing archival and published data. The addition of a far--UV color helps us to construct and test star formation model scenarios for the sources of UV emission. Models of star formation with rates in the range $\sim5-20M_{\sun}$yr$^{-1}$ indicate that the best fitting models are those with continuous star formation or a recent ($\sim4$ Myr old) burst superimposed on an old population. The presence of dust in the galaxy, dramatically revealed by HST images complicates the interpretation of UV data. However, we find that the broad--band UV/optical colors of this cD galaxy can be reasonably matched by models using a Galactic form for the extinction law with $E_{B-V}=0.14$. We also briefly discuss other objects in the large UIT field of view.
Bohlin Ralph Charles
Bothun Gragory D.
Neff Susan G.
O'Connell Robert West
Roberts Morton S.
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