Physics
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733516r&link_type=abstract
American Astronomical Society, AAS Meeting #217, #335.16; Bulletin of the American Astronomical Society, Vol. 43, 2011
Physics
Scientific paper
Current models of galaxy evolution require that galactic-scale gaseous outflows play an integral role in shaping the observed galaxy stellar mass function. The implementation of winds in these models, however, has been primarily via ad hoc prescriptions, as the physics driving such outflows is not understood. In particular, theoretical studies suggest that high spatial concentrations of star formation activity may be physically responsible for the development of an outflow; however, the relationship between host galaxy SFR surface density and outflow kinematics in distant galaxies remains poorly constrained. To address these questions, we present an analysis of absorption and emission line profiles for the MgII 2796, 2803 and FeII 2586, 2600 transitions in individual spectra of 120 galaxies at 0.3 < z < 1.4 selected from the GOODS fields and the Extended Groth Strip. We identify outflows of cool (T 104 K) gas via the blueshift of the absorption lines, and measure outflow velocities and column densities taking into consideration the effects of photon scattering on the observed profiles. Using high resolution HST/ACS imaging to estimate the size of the star forming regions in the host galaxies in tandem with measurements of total SFRs, we present one of the first explorations of trends in outflow properties with host galaxy SFR surface density. Initial results suggest only a weak dependence of outflow velocity on SFR and SFR surface density, with outflows occuring in galaxies over the full range in SFR surface density probed.
No associations
LandOfFree
Cool Gaseous Outflows and the Spatial Distribution of Star Formation in Galaxies at 0.3 < z < 1.4 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 Cool Gaseous Outflows and the Spatial Distribution of Star Formation in Galaxies at 0.3 < z < 1.4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cool Gaseous Outflows and the Spatial Distribution of Star Formation in Galaxies at 0.3 < z < 1.4 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1401949