Computer Science
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8381k&link_type=abstract
HST Proposal ID #8381
Computer Science
Hst Proposal Id #8381 Distant Galaxies
Scientific paper
The Hubble Deep Field - North {HDF-N} is an unquestionably unique laboratory for studying the formation and evolution of distant galaxies. We propose to analyze all the galaxies in the complete NICMOS map of the HDF-N with a PSF-convolved ``bulge/disk'' surface brightness model. These quantitative structural measurements in the near-infrared will be combined with WFPC2 optical measurements to answer four basic questions: {1} Are the underlying structures of distant galaxies significantly altered {or even hidden} by dust and star formation to which optical images are particularly sensitive? {2} How do dynamical masses seen in recent Keck measurements of internal kinematics of distant galaxies compare with total masses of old stars in the near-IR? {3} Is the paucity of elliptical galaxies seen in the HDF-N due to dust or late hierarchical galaxy formation? {4} What are the spatially resolved age and star formation histories of HDF-N galaxies? The proposed archival work will be an essential part of the structural and kinematical HDF-N dataset we currently have in hand, and the results will guide our future Keck efforts.
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