Ultraluminous IR Galaxies

Details Ultraluminous IR Galaxies Ultraluminous IR Galaxies

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7116s&link_type=abstract

HST Proposal ID #7116

Physics

Hst Proposal Id #7116

Scientific paper

The luminous IRAS Galaxies are probably powered by nuclear starbursts and/orcentral AGNs; many of these systems exhibit evidence of recent galacticinteraction or merging. For a sample of ultraluminous IRAS galaxies, wepropose high resolution J and H and K imaging to probe for multiple galcticnuclei, stellar bars and AGNs. Most of these objects are at z<0.1 (distances77-400 Mpc)with 0.15" resolution corresponding to 55-300pc. Imaging in all 3bands will yield estimates of the dust extinction and constrain the intrinsiccolors of the luminosity sources, be they a starburst clusters, evolvedstellar populations or AGNs. For the broadband imaging, PSF stars will beobserved. In systems with appropriate redshift for the NICMOS filter set, P-alpha images will be obtained to quantitatively assess the relativeluminosities of the starburst and point-like AGN sources. (Timing is suchthat no parallels should be done with WFPC2 or STIS.)

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