Mathematics – Logic
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5405c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #54.05; Bulletin of the American Astronomical Society, Vol. 39, p.824
Mathematics
Logic
Scientific paper
Analysis of mock quasar spectra of metal absorption lines in the proximity of formed galaxies in cosmological simulation is a highly promising approach for interpreting the efficiency with which gas is converted into stars in galaxies, the mechanisms of gas inflow in the context of the cosmic web, and the star-gas feedback processes in galaxies. We are undertaking a wholesale approach to use powerful Λ-CDM simulations to interpret high-quality absorption line data (HIRES/UVES) and high-quality galaxy imaging data (HST) for inferring the interplay between galaxies and metal enriched gas in the vicinity of galaxies (few hundred kpc).
The simulations are performed using the Eulerian Gasdynamics plus N-body Adaptive Refinement Tree (ART) code, which has gas cell resolutions of 20-50 pc. Physical processes implemented in the code include radiative cooling, star formation, metal enrichment and thermal feedback due to type II and type Ia supernovae.
We quantitatively compare the observed and simulated spatial and kinematic distribution of HI, MgII, CIV, and OVI absorption lines over a range of impact parameters as a function of redshift, and discuss key insights for interpreting the underlying temperature, density, and ionization structure of the halo/cosmic-web interface, and the influence of galaxies on its chemical enrichment. Disparities between the simulations and the statistical cross sections and velocity spreads of the absorption line data in turn provide powerful constraints on the galaxy feedback recipes, which we quantitatively examine.
Ceverino Daniel
Churchill Christopher W.
Kacprzak Glenn G.
Klypin Anatoly
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