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Related papers: Grids of stellar evolution models for asteroseismo…

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We present a flow-based generative approach to emulate grids of stellar evolutionary models. By interpreting the input parameters and output properties of these models as multi-dimensional probability distributions, we train conditional…

Solar and Stellar Astrophysics · Physics 2024-07-15 Marc Hon , Yaguang Li , Joel Ong

We present a series of colour evolution models for Luminous Red Galaxies (LRGs) in the 7th spectroscopic data release of the Sloan Digital Sky Survey (SDSS), computed using the full-spectrum fitting code VESPA on high signal-to-noise…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Rita Tojeiro , Will J. Percival , Alan F. Heavens , Raul Jimenez

We provide a status report on the determination of stellar ages from asteroseismology for stars of various masses and evolutionary stages. The ability to deduce the ages of stars with a relative precision of typically 10 to 20% is a unique…

Solar and Stellar Astrophysics · Physics 2015-08-06 Conny Aerts

The physics of stellar rotation plays a crucial role in the evolution of stars, their final fate and the properties of compact remnants. Diverse approaches have been adopted to incorporate the effects of rotation in stellar evolution…

Modern stellar structure and evolution theory experiences a lack of observational calibrations for the interior physics of intermediate- and high-mass stars. This leads to discrepancies between theoretical predictions and observed phenomena…

The ACS Survey of Galactic Globular Clusters, an HST Treasury Project, will deliver high quality, homogeneous photometry of 65 globular clusters. This paper introduces a new collection of stellar evolution tracks and isochrones suitable for…

Astrophysics · Physics 2010-11-05 A. Dotter , B. Chaboyer , D. Jevremovic , E. Baron , J. W. Ferguson , A. Sarajedini , J. Anderson

The advent of asteroseismology as the golden path to precisely characterize single stars naturally led to synergies with the field of exoplanetology. Today, the precise determination of stellar masses, radii and ages for exoplanet-host…

Solar and Stellar Astrophysics · Physics 2022-01-26 G. Buldgen , G. Ottoni , C. Pezzotti , A. Lyttle , P. Eggenberger , S. Udry , D. Ségransan , A. Miglio , M. Mayor , C. Lovis , Y. Elsworth , G. R. Davies , W. H. Ball

We show observations obtained with the integral field spectrometer OASIS for the central regions of a sample of barred galaxies. The high spatial resolution of the instrument allows to distinguish various structures within these regions as…

Astrophysics · Physics 2009-11-13 Mercedes Mollá , Simon Cantin , Carmelle Robert , Anne Pellerin

Observational systematics complicate comparisons with theoretical models limiting understanding of galaxy evolution. In particular, different empirical determinations of the stellar mass function imply distinct mappings between the galaxy…

Astrophysics of Galaxies · Physics 2019-12-04 Philip J. Grylls , F. Shankar , J. Leja , N. Menci , B. Moster , P. Behroozi , L. Zanisi

Models of rotationally-driven dynamos in stellar radiative zones have suggested that magnetohydrodynamic transport of angular momentum and chemical composition can dominate over the otherwise purely hydrodynamic processes. A proper…

Solar and Stellar Astrophysics · Physics 2015-06-05 Adrian T. Potter , Shashikumar M. Chitre , Christopher A. Tout

We present photometric evolution models of galaxies, in which, in addition to the stellar component, the effects of an evolving dusty interstellar medium have been included with particular care. Starting from the work of Calura, Pipino &…

Astrophysics of Galaxies · Physics 2009-11-13 A. Schurer , F. Calura , L. Silva , A. Pipino , G. L. Granato , F. Matteucci , R. Maiolino

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

Asteroseismology of solar-type stars has entered a new era of large surveys with the success of the NASA \textit{Kepler} mission, which is providing exquisite data on oscillations of stars across the Hertzprung-Russell (HR) diagram. From…

Asteroseismic measurements of the internal rotation rate in evolved stars pointed out to a lack of angular momentum (AM) transport in stellar evolution models. Several physical processes in addition to hydrodynamical ones were proposed as…

Solar and Stellar Astrophysics · Physics 2023-05-17 F. D. Moyano , P. Eggenberger , B. Mosser , F. Spada

We present the first version release of SESAMME, a public, Python-based full spectrum fitting tool for Simultaneous Estimates of Star-cluster Age, Metallicity, Mass, and Extinction. SESAMME compares an input spectrum of a star cluster to a…

Astrophysics of Galaxies · Physics 2023-10-17 Logan H. Jones , Svea Hernandez , Linda J. Smith , Bethan L. James , Alessandra Aloisi , Søren Larsen

The advent of space-based observatories such as CoRoT and Kepler has enabled the testing of our understanding of stellar evolution on thousands of stars. Evolutionary models typically require five input parameters, the mass, initial Helium…

Solar and Stellar Astrophysics · Physics 2016-09-07 Kuldeep Verma , Shravan Hanasoge , Jishnu Bhattacharya , H M Antia , Ganapathy Krishnamurthi

The CoRoT 5-month long observation runs give us the opportunity to analyze a large variety of red-giant stars and to derive fundamental stellar parameters from their asteroseismic properties. We perform an analysis of more than 4\,600 CoRoT…

Solar and Stellar Astrophysics · Physics 2015-05-18 B. Mosser , K. Belkacem , M. J. Goupil , A. Miglio , T. Morel , C. Barban , F. Baudin , S. Hekker , R. Samadi , J. De Ridder , W. Weiss , M. Auvergne , A. Baglin

Asteroseismic investigations based on the wealth of data now available,in particular from the CoRoT and Kepler missions, require a good understanding of the relation between the observed quantities and the properties of the underlying…

Solar and Stellar Astrophysics · Physics 2015-06-23 J. Christensen-Dalsgaard , V. Silva Aguirre , Y. Elsworth , S. Hekker

Cles is an evolution code recently developed to produce stellar models meeting the specific requirements of studies in asteroseismology. It offers the users a lot of choices in the input physics they want in their models and its versatility…

Astrophysics · Physics 2009-06-23 R. Scuflaire , S. Theado , J. Montalban , A. Miglio , P. -O. Bourge , M. Godart , A. Thoul , A. Noels

PBjam is an open-source software package for measuring mode frequencies of solar-like oscillators. These frequencies help constrain stellar evolution models to precisely estimate masses, radii, and ages of stars. The overall aim of PBjam is…

Solar and Stellar Astrophysics · Physics 2025-06-26 M. B. Nielsen , J. M. J. Ong , E. J. Hatt , G. R. Davies , W. J. Chaplin , G. T. Hookway , A. Stokholm , O. J. Scutt , M. N. Lund , R. A. Garcıa