Stellar population models for young stellar clusters

2009 ◽  
Vol 324 (2-4) ◽  
pp. 231-239 ◽  
Author(s):  
Rosa M. González Delgado
Keyword(s):  
Stellar Population ◽  
Population Models ◽  
Stellar Clusters

scholarly journals Using stellar population studies to determine the progenitors of GRBs and SNe

2009 ◽  
Vol 5 (S262) ◽  
pp. 436-437
Author(s):  
Christina C. Thöne ◽  
Lise Christensen ◽  
Johan P. U. Fynbo
Keyword(s):  
Emission Line ◽  
Stellar Population ◽  
Population Studies ◽  
Population Models ◽  
Host Galaxy ◽  
Star Forming ◽  
Spatially Resolved ◽  
Star Forming Regions

AbstractWe present spatially resolved emission line studies of three nearby GRB and SN hosts with longslit and/or IFU observations. We compare the environment of the GRBs/SNe with those of other star-forming regions in the host galaxy and try to get informations on the progenitor from stellar population models and metallicities.

scholarly journals The WAGGS project-III. Discrepant mass-to-light ratios of Galactic globular clusters at high metallicity

2020 ◽  
Vol 492 (3) ◽  
pp. 3859-3871 ◽  
Author(s):  
H Dalgleish ◽  
S Kamann ◽  
C Usher ◽  
H Baumgardt ◽  
N Bastian ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Stellar Population ◽  
Milky Way ◽  
Population Models ◽  
Theoretical Predictions ◽  
Field Unit ◽  
Stellar Masses ◽  
Kinematic Information ◽  
High Metallicity ◽  
Integral Field

ABSTRACT Observed mass-to-light ratios (M/L) of metal-rich globular clusters (GCs) disagree with theoretical predictions. This discrepancy is of fundamental importance since stellar population models provide the stellar masses that underpin most of extragalactic astronomy, near and far. We have derived radial velocities for 1622 stars located in the centres of 59 Milky Way GCs – 12 of which have no previous kinematic information – using integral-field unit data from the WAGGS project. Using N-body models, we determine dynamical masses and M/LV for the studied clusters. Our sample includes NGC 6528 and NGC 6553, which extend the metallicity range of GCs with measured M/L up to [Fe/H] ∼ −0.1 dex. We find that metal-rich clusters have M/LV more than two times lower than what is predicted by simple stellar population models. This confirms that the discrepant M/L–[Fe/H] relation remains a serious concern. We explore how our findings relate to previous observations, and the potential causes for the divergence, which we conclude is most likely due to dynamical effects.

Spectrophotometry and Stellar Population Models of “E + A” Galaxies

1996 ◽  
Vol 458 (2) ◽  
Author(s):  
Charles T. Liu ◽  
Richard F. Green
Keyword(s):  
Stellar Population ◽  
Population Models

scholarly journals Models of stellar population at high redshift, as constrainedby PN yields and luminosity function

2015 ◽  
Vol 11 (A29B) ◽  
pp. 26-32
Author(s):  
C. Maraston
Keyword(s):  
Luminosity Function ◽  
Stellar Population ◽  
High Redshift ◽  
Spectral Energy Distribution ◽  
Population Models ◽  
Asymptotic Giant Branch ◽  
Theoretical Modelling ◽  
Spectral Energy ◽  
Evolutionary Stage ◽  
Intermediate Mass Stars

AbstractThe stellar phase of Thermally-Pulsating Asymptotic giant branch is the last major evolutionary stage of intermediate-mass stars which afterwards evolve into planetary nebulae. The TP-AGB phase is affected by mass-loss and instabilities which notoriously make its theoretical modelling uncertain. This review focuses on the effects such modelling has on stellar population models for galaxies, with particular focus on the high-z Universe where galaxies are young and contain a large number of short-living TP-AGB stars. I shall present the models, discuss how different prescriptions for the treatment of the TP-AGB affect the theoretical integrated spectral energy distribution and how these compare to galaxy data, and discuss implications for the PN nebulae luminosity function stemming from the various assumptions. Finally I shall discuss the inclusion of hot evolved stars on stellar population models and how they compare to data for old galaxies at our present time.

scholarly journals Differential stellar population models: how to reliably measure [Fe/H] and [α/Fe] in galaxies

2009 ◽  
Vol 398 (1) ◽  
pp. L44-L48 ◽  
Author(s):  
C. J. Walcher ◽  
P. Coelho ◽  
A. Gallazzi ◽  
S. Charlot
Keyword(s):  
Stellar Population ◽  
Population Models

scholarly journals Stellar Population Models with Variable Element Abundance Ratios

2005 ◽  
Vol 13 ◽  
pp. 189-190
Author(s):  
Daniel Thomas ◽  
Claudia Maraston ◽  
Ralf Bender
Keyword(s):  
Absorption Line ◽  
Wavelength Range ◽  
Stellar Population ◽  
Population Models ◽  
Element Abundance ◽  
Variable Element ◽  
New Generation ◽  
First Time

AbstractWe present a comprehensive set of new generation stellar population models of Lick absorption line indices, which for the first time include element abundance ratios different from solar. We computed the 21 Lick indices CN1, CN2, Ca4227, G4300, Fe4383, Ca4455, Fe4531, C24668, Hβ, Fe5015, Mg1, Mg2, Mgb, Fe5270, Fe5335, Fe5406, Fe5709, Fe5782, Na D, TiO1, and TiO2, in the wavelength range 4000 ≲ λ ≲ 6500 Å. Models are provided with: [α/Fe] = 0.0, 0.3, 0.5, [α/Ca] = -0.1, 0.0, 0.2, 0.5, and [α/N] = −0.5, 0.0; ages from 1 to 15 Gyr; total metallicities from 1/200 to 3.5 solar (-2.25 ≤ [Z/H] ≤ 0.67).

scholarly journals Structure and dynamics of massive galaxies at z=0 in a fully cosmological simulation

2012 ◽  
Vol 8 (S295) ◽  
pp. 366-366
Author(s):  
E. Ricciardelli ◽  
J. Navarro-González ◽  
V. Quilis ◽  
A. Vazdekis
Keyword(s):  
Adaptive Mesh Refinement ◽  
Stellar Population ◽  
Mesh Refinement ◽  
Adaptive Mesh ◽  
Population Models ◽  
Massive Galaxies ◽  
Structure And Dynamics

In this contribution we present the results of an Eulerian adaptive mesh refinement (AMR) hydrodynamical and N-body simulation in a ΛCDM cosmology. The simulation used was performed with the cosmological code MASCLET (Quilis et al. 2004). Galaxies have been identified in the simulation outputs by means of an adaptive friends of friends algorithm applied to the star particles. To give light to our virtual galaxies we have assigned a spectrum to each stellar particle using the MIUSCAT stellar population models (Vazdekis et al. 2012; Ricciardelli et al. 2012).

scholarly journals UV-extended E-MILES stellar population models: young components in massive early-type galaxies

2016 ◽  
Vol 463 (4) ◽  
pp. 3409-3436 ◽  
Author(s):  
A. Vazdekis ◽  
M. Koleva ◽  
E. Ricciardelli ◽  
B. Röck ◽  
J. Falcón-Barroso
Keyword(s):  
Stellar Population ◽  
Population Models ◽  
Early Type

scholarly journals IntegratedJ- andH-band spectra of globular clusters in the LMC: implications for stellar population models and galaxy age dating

2012 ◽  
Vol 543 ◽  
pp. A75 ◽  
Author(s):  
M. Lyubenova ◽  
H. Kuntschner ◽  
M. Rejkuba ◽  
D. R. Silva ◽  
M. Kissler-Patig ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Stellar Population ◽  
Population Models ◽  
Age Dating ◽  
Band Spectra
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