Physics
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8765b&link_type=abstract
HST Proposal ID #8765
Physics
Hst Proposal Id #8765 Galaxies
Scientific paper
Currently, very little is known about nearby galaxy morphology in the UV. The restframe wavelength of galaxies at z 1 observed by HST in the R band is 3000A. Therefore, before we can fully understand the morphology of the many irregular galaxies that we see at high redshifts, we must first understand what nearby galaxies look like in the UV. Images below 3100A cannot be obtained from ground-based telescopes due to the earth's atmospheric cutoff. We propose to use Archival WFPC2 images of nearby galaxies in F300W, plus ground-based UBVR, to study morphology as a function of wavelength. The 2930A filter on HST extends from 2500A- 3200A {half power points}, thus extending much further into the UV than ground-based U{360}. This proposal will look at the predominantly early to mid-type galaxies found in the {F300W} Archive. We also propose to search the Archive F300W images taken in parallel mode for the few 'chance' nearby galaxies contained in them. Specifically, we will use the targeted and parallel F300W images in the Archive, along with our ground-based data to address the following issues: o morphology as a function of Hubble type and restframe wavelength for early and mid-type galaxies in the mid-UV o apply proper bandpass shifting effects to get more reliable distant galaxy classifications
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