Survey of Pa(alpha) in High Redshift Galaxies

Details Survey of Pa(alpha) in High Redshift Galaxies Survey of Pa(alpha) in High Redshift Galaxies

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..300p&link_type=abstract

NOAO Proposal ID #2008A-0300

Other

Scientific paper

All studies of high redshift galaxies rely on the star formation rates (SFRs) based on local calibrations, usually hydrogen recombination lines. Of these, Paschen-(alpha) ((lambda)1.8571 micron) suffers the least from dust extinction, and is a direct tracer of the ionizing radiation from young stars. We are conducting a study of paa in gravitationally lensed galaxies at 2 < z < 3 using spectroscopy from an approved GO-4 Spitzer Space Telescope program. The lensing magnification of our galaxies ranges from factors of 4 to 30, making it possible to study ``typical'' star-forming galaxies at these redshifts directly with Spitzer. As part of our Spitzer proposal, we were awarded 26.3 hours of Gemini near-IR spectroscopy to measure Hα and (where possible) Hβ line luminosities for four galaxies in our sample. The purpose of the current proposal is to rank our awarded Gemini allocation either as band 1 or band 2. The near-IR spectra are crucial to correct the observed luminosities for dust extinction. We will then compare the paa line luminosity against other SFR tracers commonly used at high redshifts: e.g., the UV luminosity; the rest-frame mid-IR emission features and luminosity, the far-IR luminosity, and the luminosity from the Hα emission line. Our galaxy sample spans the complete range of star-forming galaxy types at 2 < z < 3. Therefore these measurements will provide our best SFR comparison yet obtained at high redshift.

Affiliated with

Also associated with

No associations

Rating

Survey of Pa(alpha) in High Redshift Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Survey of Pa(alpha) in High Redshift Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Survey of Pa(alpha) in High Redshift Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1528741