Extinction Curves of Distant Galaxies

Details Extinction Curves of Distant Galaxies Extinction Curves of Distant Galaxies

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8252k&link_type=abstract

HST Proposal ID #8252

Physics

Hst Proposal Id #8252 Interstellar And Intergalactic Matter

Scientific paper

We propose to measure extinction curves in five external galaxies ranging in redshift from 0.039 to 0.96 using gravitational lenses that show differential extinction between the images. The program will more than double the number of galaxies in which extinction curves have been measured and it will provide the first such measurements far outside the local group, in early-type galaxies and at significantly different cosmic epochs. STIS spectroscopic observations will focus on the 2175Angstrom feature, combined with WFPC2 and STIS photometry to check for variability and extend the wavelength coverage. For the two systems in our sample that are radio quasars, we will be able to check for the presence of dust which is gray in the IR--UV spectral range.

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