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Related papers: PARSEC: stellar tracks and isochrones with the PAd…

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A common property of globular clusters (GC) is to host multiple populations characterized by peculiar chemical abundances. Recent photometric studies suggest that the He content could vary between the populations of a GC by up to $\Delta$He…

Solar and Stellar Astrophysics · Physics 2024-10-02 G. Costa , T. Dumont , A. Lançon , A. Palacios , C. Charbonnel , P. Prugniel , S. Ekstrom , C. Georgy , V. Branco , P. Coelho , L. Martins , S. Borisov , K. Voggel , W. Chantereau

A code computing consistently the evolution of stars, gas and dust, as well as the energy they radiate, is required to derive reliably the history of galaxies by fitting synthetic SEDs to multiwavelength observations. The new code…

Astrophysics of Galaxies · Physics 2019-03-27 Michel Fioc , Brigitte Rocca-Volmerange

We present numerical simulations to describe the evolution of pre-Galactic clouds in a model which is motivated by cold dark matter simulations of hierarchical galaxy formation. We adopt a SN-induced star-formation mechanism within a model…

Astrophysics · Physics 2007-05-23 Lamya Saleh , Timothy C. Beers , Grant J. Mathews

In view of the important contributions of red giants to the integrated light in evolutionary synthesis calculations of old stellar populations in clusters and galaxies, we provide a comparison of theoretical isochrones computed from the…

Astrophysics · Physics 2007-05-23 T. Lejeune , R. Buser

Opacity calculations are basic ingredients of stellar modelling. They play a crucial role in the interpretation of acoustic modes detected by SoHO, COROT and KEPLER. In this review we present our activities on both theoretical and…

We supplement current evolutionary computations concerning Magellanic Cloud stars by exploring the evolutionary behavior of canonical stellar models (i.e.,with inefficient core overshooting) with metallicities suitable for stars in the…

Astrophysics · Physics 2009-11-07 V. Castellani , S. Degl'Innocenti , M. Marconi , P. G. Prada Moroni , P. Sestito

We present a comprehensive study of the abundance evolution of the elements from H to U in the Milky Way halo and local disk. We use a consistent chemical evolution model, metallicity dependent isotopic yields from low and intermediate mass…

Astrophysics of Galaxies · Physics 2018-02-21 N. Prantzos , C. Abia , M. Limongi , A. Chieffi , S. Cristallo

We derive detailed theoretical models for 1074 nearby stars from the SPOCS (Spectroscopic Properties of Cool Stars) Catalog. The California and Carnegie Planet Search has obtained high-quality echelle spectra of over 1000 nearby stars taken…

P\'egase.3 is a Fortran 95 code modeling the spectral evolution of galaxies from the far-ultraviolet to submillimeter wavelengths. It also follows the chemical evolution of their stars, gas and dust. For a given scenario (a set of…

Instrumentation and Methods for Astrophysics · Physics 2019-02-07 Michel Fioc , Brigitte Rocca-Volmerange

The Hipparcos mission has made it possible to constrain the positions of nearby field stars in the colour-magnitude diagram with very high accuracy. These positions can be compared with the predictions of stellar evolutionary calculations…

Astrophysics · Physics 2009-09-17 Carlos Allende Prieto , David L. Lambert

Thanks to modern understanding of stellar evolution, we can accurately measure the age of Open Clusters (OCs). Given their position, they are ideal tracers of the Galactic disc. Gaia data release 2, besides providing precise parallaxes, led…

Several years ago, M. Asplund and coauthors (2004) proposed a revision of the Solar composition. The use of this new prescription for Solar abundances in standard stellar models generated a strong disagreement between the predictions and…

Solar and Stellar Astrophysics · Physics 2017-03-22 F. Delahaye , P. Palmeri , P. Quinet , C. J. Zeippen

Characterizing the physical properties of exoplanets, and understanding their formation and orbital evolution requires precise and accurate knowledge of their host stars. Accurately measuring stellar masses is particularly important because…

Solar and Stellar Astrophysics · Physics 2015-10-21 Luan Ghezzi , John Asher Johnson

Our unified chemical and spectrophotometric evolution code allows to simultaneously study the ISM abundances of a series of elements and the spectral properties of the stellar population in our model galaxies. We use stellar evolutionary…

Astrophysics · Physics 2007-05-23 Uta Fritze - v. Alvensleben

Recent observations provide determinations of individual masses, chemical composition and metallicity of the components of the spectroscopic and interferometric binary \iota Peg (Boden et al. 1998). Using updated physics, to calibrate the…

Astrophysics · Physics 2016-08-30 P. Morel , Ch. Morel , J. Provost , G. Berthomieu

This is the second paper of a series reporting the results from the PopStar evolutionary synthesis models. Here we present synthetic emission line spectra of H{\sc ii} regions photoionized by young star clusters, for seven values of cluster…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 M. L. Martín-Manjón , M. L. García-Vargas , M. Mollá , A. I. Díaz

Stellar evolution codes play a major role in present-day astrophysics, yet they share common simplifications related to the outer layers of stars. We seek to improve on this by the use of results from realistic and highly detailed 3D…

We introduce a new generation of PARSEC-COLIBRI stellar isochrones that include a detailed treatment of the thermally-pulsing asymptotic giant branch (TP-AGB) phase, and covering a wide range of initial metallicities (0.0001<Zi<0.06).…

The chemical composition of high redshift galaxies is an important property which gives clues to their past history and future evolution and yet is difficult to measure with current techniques. In this paper we investigate new metallicity…