WFC Imaging of Faint Blue Galaxies

Computer Science

Scientific paper

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Hst Proposal Id #3797

Scientific paper

We propose a pilot program of 5.6 hours of WFC imaging to study the structure of 7 faint (B=21 to 22) compact galaxies at redshifts z from 0.1 to 0.35. These galaxies are important as possible links to three puzzles that may be intimately related: the nature of very faint, very blue galaxies; the rate of close-encounter merging of field galaxies as a function of look-back time; and the connection between starbursts and "weak" AGN. The sub-arcsec morphology from HST will be correlated with existing ground-based spectroscopy, multi-band color photometry, long-term variability information, and similar data for neighboring galaxies. As a bonus, the structure of galaxy neighbors close enough to be within the WFC field will be measured. The feasibility of our proposal was verified in SAO 3121 (The Ability of HST to Do Morphology of Medium Redshift Galaxies).

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