Morphological similarities between HDF and ultraluminous IR galaxies

Details Morphological similarities between HDF and ultraluminous IR galaxies Morphological similarities between HDF and ultraluminous IR galaxies

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..408..423b&link_type=abstract

The ultraviolet universe at low and high redshift. AIP Conference Proceedings, Volume 408, pp. 423-428 (1997).

Mathematics

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2

Stellar Content And Populations, Radii, Morphology And Overall Structure, Near Infrared

Scientific paper

High-resolution HST images of galaxies in the Hubble Deep Field (HDF) reveal a striking morphological similarity to HST images of the ultraluminous IR galaxies (ULIRGs). The HDF images typically represent high-redshift galaxies observed in the rest-frame UV, whereas the ULIRG images represent low-to-moderate-redshift galaxies observed in the rest-frame I-band. It is likely that many of the HDF galaxies are high-redshift counterparts of the low-redshift ULIRGs. The overwhelming majority of the ULIRGs are strongly disturbed, starbursting systems that owe their extraordinarily peculiar morphologies and intense star formation rates to recent tidal interaction/merger events. Some of the HDF galaxies may in fact be of this type. However, results from other groups have now revealed similar peculiar morphologies in the rest-frame UV of optically normal nearby galaxies. Comparisons between the ULIRGs and the HDF galaxies therefore require further analysis of the UV morphologies of local galaxies before a tidal/starburst origin can be conclusively ascribed to the HDF galaxies.

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