Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8303m&link_type=abstract
HST Proposal ID #8303
Other
Hst Proposal Id #8303 Galaxy Populations And Interactions
Scientific paper
We have found a most peculiar galaxy, 52W036, in our large, deep redshift survey of faint galaxies. This galaxy, previously identified as a submillijansky radio source at z=0.24, is outstanding in almost every property. Its combination of enormous size and luminosity, high surface- brightness, and very blue color do not compare to that of any other known galaxy. In addition, its morphology changes dramatically from a horse-shoe shape in the ultra-violet to an apparent source pair in the near-infrared. Over the past decade we have given this particular object special attention in attempt to understand its bizarre nature. At present, the reason for its unusual properties still eludes us. Possibilities include that it is a powerfully starbursting ring galaxy, a tidally interacting galaxy pair, or perhaps even a gravitational lens. Discriminating between these possible scenarios, or others, is not presently possible with the resolution of our ground-based imaging; only HST can reveal what must be a complex {and beautiful} morphology for a galaxy at this redshift. Moreover, with STIS near-UV imaging we can determine whether 52W036 provides a local counterpart to the most extreme star forming galaxies at z = 3 as seen, e.g., in the Hubble Deep Field. Whatever the nature of 52W036, HST imaging will be an essential element to understanding a system which may well be the most extreme of all ``normal" galaxies known to date.
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