Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Koleva, Mina"'
Autor:
Ryś, Agnieszka, Koleva, Mina, Falcón-Barroso, Jesús, Vazdekis, Alexandre, Lisker, Thorsten, Peletier, Reynier, van de Ven, Glenn
We present the stellar population analysis of a sample of 12 dwarf elliptical galaxies, observed with the SAURON integral field unit, using the full-spectrum fitting method. We show that star formation histories (SFHs) resolved into two populations c
Externí odkaz:
http://arxiv.org/abs/1506.05810
Autor:
Koleva, Mina V.
Le passé des galaxies est inscrit dans leurs populations stellaires. Les galaxies les plus nombreuses sont les naines elliptiques (dEs), survivantes de la construction hiérarchique des structures. Par conséquent, l’évolution de l’Univers peut
Externí odkaz:
http://www.theses.fr/2009LYO10020
Autor:
Cloet-Osselaer, Annelies, De Rijcke, Sven, Vandenbroucke, Bert, Schroyen, Joeri, Koleva, Mina, Verbeke, Robbert
We investigate the evolution of dwarf galaxies using N -body/SPH simulations that incorporate their formation histories through merger trees constructed using the ex- tended Press-Schechter formalism. The simulations are computationally cheap and hav
Externí odkaz:
http://arxiv.org/abs/1406.2469
Autor:
Verbeke, Robbert, De Rijcke, Sven, Koleva, Mina, Cloet-Osselaer, Annelies, Vandenbroucke, Bert, Schroyen, Joeri
Using computer simulations, we explored gaseous infall as a possible explanation for the starburst phase in Blue Compact Dwarf galaxies. We simulate a cloud impact by merging a spherical gas cloud into an isolated dwarf galaxy. We investigated which
Externí odkaz:
http://arxiv.org/abs/1405.2339
Autor:
Schroyen, Joeri, De Rijcke, Sven, Koleva, Mina, Cloet-Osselaer, Annelies, Vandenbroucke, Bert
We present a detailed analysis of the formation, evolution, and possible longevity of metallicity gradients in simulated dwarf galaxies. Specifically, we investigate the role of potentially orbit-changing processes such as radial stellar migration an
Externí odkaz:
http://arxiv.org/abs/1306.4910
Autor:
De Rijcke, Sven, Schroyen, Joeri, Vandenbroucke, Bert, Jachowicz, Natalie, Decroos, Jeroen, Cloet-Osselaer, Annelies, Koleva, Mina
In this paper, we present a new calculation of composition-dependent radiative cooling and heating curves of low-density gas, intended primarily for use in numerical simulations of galaxy formation and evolution. These curves depend on only five para
Externí odkaz:
http://arxiv.org/abs/1306.4860
Publikováno v:
The Astrophysical Journal Letters, Volume 770, Issue 2, article id. L26, 5 pp. (2013)
FCC046 is a Fornax Cluster dwarf elliptical galaxy. Optical observations have shown that this galaxy, besides an old and metal-poor stellar population, also contains a very young centrally concentrated population and is actively forming stars, albeit
Externí odkaz:
http://arxiv.org/abs/1306.4859
Autor:
Prugniel, Philippe, Koleva, Mina
We present model spectra of stellar populations with variable chemical composition. We derived the [alpha/Fe] abundance ratio of the stars of the most important libraries (ELODIE, CFLIB and MILES) using full spectrum fitting and we generated PEGASE.H
Externí odkaz:
http://arxiv.org/abs/1112.0513
The spectral predictions of stellar population models are not as accurate in the ultra-violet (UV) as in the optical wavelength domain. One of the reasons is the lack of high-quality stellar libraries. The New Generation Stellar Library (NGSL), recen
Externí odkaz:
http://arxiv.org/abs/1111.5449
We studied the stellar populations of 40 early-type galaxies using medium resolution long-slit spectroscopy along their major axes (and along the minor axis for two of them), from 10^7 Msol to 10^12 Msol (-9.2 > M_B > -22.4 mag). All the studied gala
Externí odkaz:
http://arxiv.org/abs/1105.4809