Physics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10659h&link_type=abstract
HST Proposal ID #10659
Physics
Hst Proposal Id #10659 Galaxies
Scientific paper
Using 380 stellar spectra from Hubble's Next Generation Spectral Library {NGSL; PI=Michael Gregg; GO 9088, 9786} incorporated in our stellar population synthesis code {Bruzual & Charlot 2003}, we propose to constrain simultaneously the star-formation history and mean age, stellar metallicity and mass of galaxies over a wide redshift interval {z= 0 -2}. The main advantages of the NGSL are the high-quality spectrophotometry {S/N >50} and broad wavelength coverage {2000-10, 000 Ang} of the STIS spectra. The NGSL enables mid-UV as well as optical spectral indices to be used, thereby increasing the redshift interval of their application. It also guarantees consistency in treating low- and high-redshift galaxies, since the same stars are used as spectral templates. To realize the full potential of the NGSL, however, will require significant custom data-processing, calibration, and evaluation of the STIS data.
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