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Related papers: UV-extended E-MILES stellar population models: you…

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Using a widely used stellar population synthesis model, we study the ability of using pairs of AB system colours to break the well-known stellar age--metallicity degeneracy and give constraints on the two stellar-population parameters (age…

Astrophysics · Physics 2009-11-13 Zhongmu Li , Zhanwen Han

Ultra strong emission-line galaxies (USELs) with extremely high equivalent widths (EW(H beta) > 30A) can be used to pick out galaxies of extremely low metallicity in the z=0-1 redshift range. Large numbers of these objects are easily…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-11 Esther M. Hu , Lennox L. Cowie , Yuko Kakazu , Amy J. Barger

I describe very briefly the new libraries of empirical spectra of stars covering wide ranges of values of the atmospheric parameters Teff, log g, [Fe/H], as well as spectral type, that have become available in the recent past, among them…

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

Fitting whole spectra at intermediate spectral resolution (R = 1000 -- 3000), to derive physical properties of stellar populations, appears as an optimized alternative to methods based on spectrophotometric indices: it uses all the…

Astrophysics · Physics 2009-11-13 M. Koleva , Ph. Prugniel , P. Ocvirk , D. Le Borgne , C. Soubiran

We probe the stellar population age and metallicity distributions in nearby elliptical galaxies over the largest extension to date. Long-slit spectroscopy is made by using the spectrograph SCORPIO of the 6-m telescope of the Special…

Astrophysics · Physics 2009-11-13 M. Baes , O. K. Sil'chenko , A. V. Moiseev , E. A. Manakova

We measure a relation between the depth of four prominent rest-UV absorption complexes and metallicity for local galaxies and verify it up to z~3. We then apply this relation to a sample of 224 galaxies at 3.5 < z < 6.0 (<z> = 4.8) in…

We have acquired intermediate resolution spectra in the 3700-7000 A wavelength range for a sample of 65 early-type galaxies predominantly located in low density environments, a large fraction of which show emission lines. The spectral…

Astrophysics · Physics 2007-05-23 F. Annibali , A. Bressan , R. Rampazzo , W. Zeilinger , L. Danese

We present a summary of our recent work on the vertical distribution of the resolved stellar populations in six low mass, edge-on, spiral galaxies observed with the Hubble Space Telescope Advanced Camera for Surveys (HST/ACS). In each…

Astrophysics · Physics 2007-05-23 Anil Seth , Julianne Dalcanton , Roelof de Jong

We report on results from the analysis of a stellar mass-selected (log M*>9.0) sample of 1644 galaxies at 0.65<z<1.1 with ultra-deep (m<26.5) optical medium-band (R~50) photometry from the Survey for High-z Absorption Red and Dead Sources…

We present a new stellar population synthesis model, which predicts SEDs for single-age single-metallicity stellar populations, SSPs, at resolution 1.5A (FWHM) in the spectral region of the near-IR CaII triplet feature. The main ingredient…

Astrophysics · Physics 2009-11-07 A. Vazdekis , A. J. Cenarro , J. Gorgas , N. Cardiel , R. F. Peletier

The number of methods used to study the properties of galaxies is increased, and testing these methods is very important. Galactic globular clusters (GCs) provide an excellent medium for such test, because they can be considered as simple…

Astrophysics of Galaxies · Physics 2015-06-03 Yu Zhang , Zhanwen Han , Jinzhong Liu , Fenghui Zhang , Xiaoyu Kang

We use empirical star formation histories (SFHs), measured from HST-based resolved star color-magnitude diagrams, as input into population synthesis codes to model the broadband spectral energy distributions (SEDs) of ~50 nearby dwarf…

This paper presents theoretical integrated spectral energy distributions (SEDs) of binary star composite stellar populations (bsCSPs) in early-type galaxies, and how the bsCSP model can be used for spectral studies of galaxies. All bsCSPs…

Astrophysics of Galaxies · Physics 2015-06-05 Zhongmu Li , Liyun Zhang , Jinzhong Liu

The Magellanic Clouds are the most massive and closest satellite galaxies of the Milky Way, with stars covering ages from a few Myr up to 13 Gyr. This makes them important for validating integrated light methods to study stellar populations…

We perform population synthesis modelling of a magnitude-limited sample of 4391 Luminous Red Galaxies selected from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4). We fit measured spectral indices using a large library of high…

Astrophysics · Physics 2008-11-26 T. Barber , A. Meiksin , T. Murphy

Key information to understand the formation and evolution of disk galaxies are imprinted in the stellar populations of their bulges. This paper has the purpose to make available new measurements of the stellar population properties of the…

Astrophysics of Galaxies · Physics 2015-06-23 L. Morelli , A. Pizzella , E. M. Corsini , E. Dalla Bontà , L. Coccato , J. Méndez-Abreu , M. Parmiggiani

Conventionally, CMD analyses of nearby star clusters are based on observations in 2 passbands. They are plagued by considerable degeneracies between age, metallicity, distance (and extinction) that can largely be resolved by including…

We present PEGASE-HR, a new stellar population synthesis program generating high resolution spectra (R=10 000) over the optical range lambda=400--680 nm. It links the spectro-photometric model of galaxy evolution PEGASE.2 (Fioc &…

Stellar population synthesis models can now reproduce the photometry of old stellar systems (age $>$ 2 Gyr) in the near-infrared (NIR) bands at 3.4 and 4.6$\mu$m (WISE W1 $\&$ W2 or IRAC 1 $\&$ 2). In this paper we derive stellar…

We present a detailed investigation of the young stellar populations(YSP) in the radio-loud ultra luminous infrared galaxy (ULIRG) PKS1345+12, based on high resolution HST imaging and long slit spectra taken with the WHT. While the images…

Astrophysics · Physics 2008-11-26 J. Rodriguez Zaurin , J. Holt , C. N. Tadhunter , R. M. Gonzalez Delgado