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We present here the results of applying a new chemo-evolutionary stellar population model developed by ourselves in a previous paper (Vazdekis et al. 1996) to new high quality observational data of the nuclear regions of two representative…

Astrophysics · Physics 2016-08-30 A. Vazdekis , R. F. Peletier , J. E. Beckman , E. Casuso

This is the third paper of a series reporting the results from the POPSTAR evolutionary synthesis models. The main goal of this work is to present and discuss the synthetic photometric properties of Single Stellar Populations (SSPs)…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 M. L. García-Vargas , M. Mollá , M. L. Martín-Manjón

[Abridged]. We present SEDs for single-age, single-metallicity stellar populations (SSPs) covering the optical range at resolution 2.3A (FWHM). These SEDs constitute our base models, as they combine scaled-solar isochrones with MILES…

Cosmology and Nongalactic Astrophysics · Physics 2010-04-27 A. Vazdekis , P. Sánchez-Blázquez , J. Falcón-Barroso , A. J. Cenarro , M. A. Beasley , N. Cardiel , J. Gorgas , R. F. Peletier

The colour-magnitude diagrams of resolved single stellar populations, such as open and globular clusters, have provided the best natural laboratories to test stellar evolution theory. Whilst a variety of techniques have been used to infer…

Astrophysics · Physics 2009-11-13 X. Hernandez , D. Valls-Gabaud

We compare six popularly used evolutionary population synthesis (EPS) models (BC03, CB07, Ma05, GALEV, GRASIL, Vazdekis/Miles) through fitting the full optical spectra of six representative types of galaxies (star-forming and composite…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 X. Y. Chen , Y. C. Liang , F. Hammer , Ph. Prugniel , G. H. Zhong , M. Rodrigues , Y. H. Zhao , H. Flores

We build the Yunnan-III evolutionary population synthesis (EPS) models by using the MESA stellar evolution code, BaSeL stellar spectra library and the initial mass functions (IMFs) of Kroupa and Salpeter, and present colours and integrated…

Solar and Stellar Astrophysics · Physics 2015-06-11 F. Zhang , L. Li , Z. Han , Y. Zhuang , X. Kang

In this paper, I review to what extent we can understand the photometric properties of star clusters, and of low-mass, unresolved galaxies, in terms of population synthesis models designed to describe `simple stellar populations' (SSPs),…

Astrophysics of Galaxies · Physics 2009-11-05 A. Gustavo Bruzual

We present the first single-burst stellar population models in the infrared wavelength range between 2.5 and 5 {\mu}m which are exclusively based on empirical stellar spectra. Our models take as input 180 spectra from the stellar IRTF…

Astrophysics of Galaxies · Physics 2015-05-08 B. Röck , A. Vazdekis , R. F. Peletier , J. H. Knapen , J. Falcón-Barroso

Simple stellar population (SSP) synthesis models are useful tools for studying the nature of unresolved star clusters in external galaxies. However, the plethora of currently available SSP models gives rise to significant and poorly…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Z. Fan , R. de Grijs

Using EPS we present high resolution (0.3 \AA, HRes) ISEDs from 3000 to 7000 \AA and Lick/IDS absorption-line indices, for an extensive set of instantaneous burst binary stellar populations (BSPs) with binary interactions. The ages of the…

Astrophysics · Physics 2009-11-13 Fenghui Zhang , Lifang Li , Zhanwen Han

We include gaseous continuum and line emission into our GALEV models for the spectral and photometric evolution of Simple Stellar Populations (SSPs) for various metallicities in the range 0.02 <= Z/Zsun <= 2.5. This allows to extend them to…

Astrophysics · Physics 2010-04-06 Peter Anders , Uta Fritze -- v. Alvensleben

We present Monte Carlo models of open stellar clusters with the purpose of mapping out the behavior of integrated colors with mass and age. Our cluster simulation package allows for stochastic variations in the stellar mass function to…

Astrophysics of Galaxies · Physics 2015-05-14 Bogdan Popescu , M. M. Hanson

Subdwarf B stars (sdBs) can significantly change the ultraviolet spectra of populations at age t~1Gyr, and have been even included in the volutionary population synthesis (EPS) models by Han et al. (2007). In this study we present the…

Solar and Stellar Astrophysics · Physics 2010-06-24 F. Zhang , Z. Han , L. Li , Y. Zhang , J. Guo

Taking advantage of recent important advances in the calculation of high-resolution spectral grids of stellar atmospheres at short wavelengths, and their implementation for population synthesis models, we briefly review here some special…

Astrophysics · Physics 2007-09-19 A. Buzzoni , E. Bertone , M. Chavez , L. H. Rodriguez-Merino

We present Gemini/GNIRS cross-dispersed near-infrared spectra of 12 nearby early-type galaxies, with the aim of testing commonly used stellar population synthesis models. We select a subset of galaxies from the atlas/ sample which span a…

Astrophysics of Galaxies · Physics 2017-12-06 C. M. Baldwin , R. M. McDermid , H. Kuntschner , C. Maraston , C. Conroy

Combining population synthesis models with simple Montecarlo simulations of stochastic effects in the number of stars occupying sparsely populated stellar evolutionary phases in the HRD, I show that the scatter observed in the photometric…

Astrophysics · Physics 2007-05-23 A. Gustavo Bruzual

In systems undergoing starbursts the evolution of the young stellar population is expected to drive changes in the emission line properties. This evolution is usually studied theoretically, with a combination of evolutionary synthesis…

A series of population models are designed to explore the star formation history of gas-rich, low surface brightness (LSB) galaxies. LSB galaxies are unique in having properties of very blue colors, low H$\alpha$ emission and high gas…

Astrophysics of Galaxies · Physics 2015-06-22 James Schombert , Stacy McGaugh

Synthetic integrated spectral properties of the old Galactic open clusters are studies in this work, where twenty-seven Galactic open clusters of ages >= 1Gyr are selected as the working sample. Based on the photometric observations of…

Astrophysics · Physics 2009-11-10 Y. Xin , L. Deng

We present and discuss evolutionary synthesis models for massive stellar populations generated with the Starburst99 code in combination with a new set of stellar evolution models accounting for rotation. The new stellar evolution models…