The Hoag's Object, UGC 4599 and NGC 6028: Other Examples of Star Forming Rings

Details The Hoag's Object, UGC 4599 and NGC 6028: Other Examples of Star Forming Rings The Hoag's Object, UGC 4599 and NGC 6028: Other Examples of Star Forming Rings

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21714909m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #149.09; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We study a sub-sample of Brightest Cluster Galaxies (BCGs) drawn from the Szabo et al. SDSS cluster catalogue, by selecting those in the richest clusters which also have a Galex counterpart and are at redshifts 0.1-0.4. Our multiwavelength approach allows us
to study recent episodes of star formation witnessed by the UV-optical colours, as a function of the host cluster properties. In particular, we present a sample of blue BCGs in likely cool-core clusters that deserve X-ray follow-up. The properties of these galaxies have been carefully compared to our control sample of blue BCGs which have a known X-ray counterpart.
Finally, we highlight the presence of interacting blue central early-type BCGs as interesting evidence of the
creation of the dominat galaxy. In the course of the survey of BCG star formation, we serendipitously discovered a new example of a UV ring galaxy, UGC 4599. We compare the UV properties of this new UV ring galaxy with the well studied elliptical NGC 404, and with Hoag's Object, for which we report the first GALEX photometry.

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