Ultraviolet Imaging Observations of the cD Galaxy in Abell 1795: Further Evidence for Massive Star Formation in a Cooling Flow | Zendy

Eric P. Smith | Zendy; R. C. Bohlin | Zendy; G. D. Bothun | Zendy; R. W. O’Connell | Zendy; Morton S. Roberts | Zendy; S. G. Neff | Zendy; Andrew M. Smith | Zendy; T. P. Stecher | Zendy

Open Access

Ultraviolet Imaging Observations of the cD Galaxy in Abell 1795: Further Evidence for Massive Star Formation in a Cooling Flow

Author(s) -

Eric P. Smith,

R. C. Bohlin,

G. D. Bothun,

R. W. O’Connell,

Morton S. Roberts,

S. G. Neff,

Andrew M. Smith,

T. P. Stecher

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/303819

Subject(s) - physics , astrophysics , galaxy , astronomy , star formation , photometry (optics) , galaxy cluster , ultraviolet , extinction (optical mineralogy) , hubble space telescope , stars , quantum mechanics , optics

We present images from the Ultraviolet Imaging Telescope of the Abell 1795cluster of galaxies. We compare the cD galaxy morphology and photometry ofthese data with those from existing archival and published data. The additionof a far--UV color helps us to construct and test star formation modelscenarios for the sources of UV emission. Models of star formation with ratesin the range $\sim5-20M_{\sun}$yr$^{-1}$ indicate that the best fitting modelsare those with continuous star formation or a recent ($\sim4$ Myr old) burstsuperimposed 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 canbe reasonably matched by models using a Galactic form for the extinction lawwith $E_{B-V}=0.14$. We also briefly discuss other objects in the large UITfield of view.Comment: To appear in the Astrophysical Journal. 14 AAS preprint style pages plus 7 figure

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