Galaxy Interaction Simulations for Interpretation of HST Observations

Details Galaxy Interaction Simulations for Interpretation of HST Observations Galaxy Interaction Simulations for Interpretation of HST Observations

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9515p&link_type=abstract

HST Proposal ID #9515

Mathematics

Logic

Hst Proposal Id #9515 Cosmology

Scientific paper

There is mounting evidence from HST and ground-based observations that galaxy interactions and mergers were more common in the past, and may have been the dominant driver of star formation and galaxy evolution at early epochs. We propose to carry out an extensive suite of hydrodynamic simulations of galaxy interactions and mergers, including star formation and stellar population synthesis, over a range of redshifts z=0-3. The results will be used to create `mock HST' images for direct comparison with archival WFPC2 and NICMOS and future ACS imaging data. Our proposed `grid' of simulations will greatly extend previous work of this kind by covering a much larger parameter space of initial conditions, including high redshift, and by incorporating state-of-the-art understanding of disk formation theory and the properties of dark matter halos. We then propose to calculate structural and morphological statistics {such as concentration/asymmetry statistics, resolved colors, light profile and effective radius, etc.} on the mock and real images at a variety of wavelengths {rest UV to near-IR}. This comparison will help to interpret the nature of the observed objects and the reasons for the preponderence of galaxies with disturbed morphology at high redshift.

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