343 citations · 2.8k across the 61 of their papers we have counts for
9 papers · 1 filter
Bimodal gas accretion in the Horizon-MareNostrum galaxy formation simulation
P. Ocvirk, C. Pichon, R. Teyssier
(abridged) The physics of diffuse gas accretion and the properties of the cold and hot modes of accretion onto proto-galaxies between z=2 and z=5.4 is investigated using the large…
Spectroscopic ages and metallicities of stellar populations: validation of full spectrum fitting
M. Koleva, Ph. Prugniel, P. Ocvirk +2
Fitting whole spectra at intermediate spectral resolution (R = 1000 -- 3000), to derive physical properties of stellar populations, appears as an optimized alternative to methods b…
Analysis of stellar populations with large empirical libraries at high spectral resolution
Philippe Prugniel, Mina Koleva, Pierre Ocvirk +2
The stellar population models dramatically progressed with the arrival of large and complete libraries, ELODIE, CFLIB (=Indo-US) and MILES at a relatively high resolution. We show…
Comparison of different spectral population models
Mina Koleva, Philippe Prugniel, Pierre Ocvirk +3
We have compared simple stellar populations (SSPs) generated with different population synthesis tools: BC03, Vazdekis and Pegase.HR and different stellar libraries: ELODIE3.1, Ste…
Age and metallicity of Galactic clusters from full spectrum fitting
Mina Koleva, Philippe Prugniel, Pierre Ocvirk +1
We are using full spectrum fitting to determine the ages and metallicities of Galactic clusters (M67 and globular clusters). We find that the method is very accurate to measure the…
STEllar Content and Kinematics from high resolution galactic spectra via Maximum A Posteriori
P. Ocvirk, C. Pichon, A. Lancon +1
We introduce STECKMAP (STEllar Content and Kinematics via Maximum A Posteriori), a method to recover the kinematical properties of a galaxy simultaneously with its stellar content…