Origin and Evolution of IR Luminous Galaxies: Are z>=1 Dusty Starbursts and z=0 ULIRGs the Same?

Details Origin and Evolution of IR Luminous Galaxies: Are z>=1 Dusty Starbursts and z=0 ULIRGs the Same? Origin and Evolution of IR Luminous Galaxies: Are z>=1 Dusty Starbursts and z=0 ULIRGs the Same?

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9483y&link_type=abstract

HST Proposal ID #9483

Physics

Hst Proposal Id #9483

Scientific paper

Interactions and mergers involving gas-rich galaxies are the main driving mechanism behind the luminous IR galaxy phenomenon. However it is dangerous to extrapolate this model directly to high redshifts because massive spiral progenitors may have been relatively uncommon at earlier epochs. Mergers and interactions involving less massive but more gas-rich progenitors may have occurred instead. We propose to test this hypothesis directly by imaging 12 FIR-selected, dusty starbursts at z 1 at sub-kpc resolution afforded by HST in the rest frame B and I {observed I and H} bands using ACS and NICMOS. While studying higher redshift systems is clearly desirable, band-shifting and surface brightness dimming makes the investigations of tidal features and the nature of progenitors possible only out to z 1 {Hibbard & Vacca 1997}. From the morphologies, surface brightnesses, and color distribution, we will determine the physical status of the starburst hosts, the history of tidal interactions/mergers, and the nature of the progenitors. We will also test for the presence of hidden AGNs and for enhanced galaxy number density. Our 12 target galaxies form a complete sample of known ultraluminous and hyperluminous galaxies at 0.7

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