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Related papers: MESA Isochrones and Stellar Tracks (MIST). I: Sola…

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One--dimensional stellar structure and evolution programs are built using different physical prescriptions and algorithms, which means there can be variations between models' predictions even when using identical input physics. This leads…

Solar and Stellar Astrophysics · Physics 2023-08-09 Giulia C. Cinquegrana , Meridith Joyce , Amanda I. Karakas

Sun-like stars are well represented in the solar neighbourhood but are currently under-utilised, with many studies of chemical and kinematic evolution focusing on red giants (which can be observed further away) or turn-off stars (which have…

Solar and Stellar Astrophysics · Physics 2024-12-13 Christian Lehmann , Michael T. Murphy , Fan Liu , Chris Flynn

We present models that predict spectra of old- and intermediate-aged stellar populations at 2.51\AA\ (FWHM) with varying [\alpha/Fe] abundance. The models are based on the MILES library and on corrections from theoretical stellar spectra.…

The ages of star clusters and co-moving stellar groups contain essential information about the Milky Way. Their special properties make them excellent tracers of galactic structure and key components to unlocking its star formation history.…

Astrophysics of Galaxies · Physics 2024-10-02 Alena Rottensteiner , Stefan Meingast

We present a new database of stellar evolution models for a large range of masses and chemical compositions, based on an up-to-date theoretical framework. We briefly discuss the physical inputs and the assumptions adopted in computing the…

Astrophysics · Physics 2010-12-09 S. Cassisi , A. Pietrinferni , M. Salaris , F. Castelli , D. Cordier , M. Castellani

We present a new library of semi-empirical stellar population models that are based on the empirical MILES and semi-empirical sMILES stellar libraries. The models span a large range of age and metallicity, in addition to an [$\alpha$/Fe]…

Astrophysics of Galaxies · Physics 2023-06-12 Adam T. Knowles , Anne E. Sansom , Alex Vazdekis , Carlos Allende Prieto

Modern tools for modeling stellar evolution, such as MESA (Modules for Experiments in Stellar Astrophysics), offer state-of-the-art implementations of stellar theories. However, this parametric approach introduces many free parameters that…

Solar and Stellar Astrophysics · Physics 2026-02-10 O. Ziółkowska , R. Smolec , A. Thoul , R. Singh Rathour , V. Hocdé

We present a new set of cooling models and isochrones for both H- and He-atmosphere white dwarfs, incorporating accurate boundary conditions from detailed model atmosphere calculations, and carbon-oxygen chemical abundance profiles based on…

Solar and Stellar Astrophysics · Physics 2015-05-18 M. Salaris , S. Cassisi , A. Pietrinferni , P. M. Kowalski , J. Isern

Recent advancements in stellar evolution modeling offer unprecedented accuracy in predicting the evolution and deaths of stars. We present new stellar evolutionary models computed with the updated PARSEC V2.0 code for a comprehensive and…

We present new cooling models for carbon-oxygen white dwarfs with both H- and He-atmospheres, covering the whole relevant mass range, to extend our updated BaSTI (a Bag of Stellar Tracks and Isochrones) stellar evolution archive. They have…

Solar and Stellar Astrophysics · Physics 2021-12-22 Maurizio Salaris , Santi Cassisi , Adriano Pietrinferni , Sebastian Hidalgo

Detached, double-lined spectroscopic binaries which are also eclipsing provide the most accurate determinations of stellar mass, radius, temperature and distance-independent luminosity for each of their individual components, and hence…

Astrophysics · Physics 2009-11-07 E. Lastennet , D. Valls-Gabaud

We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (MESA). RSP is a new functionality in MESAstar that models the non-linear radial stellar pulsations that characterize RR…

PARSEC v2.0 rotating stellar tracks were previously presented for six values of metallicity from subsolar to solar values, with initial rotation rates ($\omega_\mathrm{i}$, defined as the ratio of angular velocity and its critical value)…

Solar and Stellar Astrophysics · Physics 2025-10-01 C. T. Nguyen , G. Costa , A. Bressan , L. Girardi , G. Cescutti , A. J. Korn , G. Volpato , Y. Chen , G. Pastorelli , M. Trabucchi , K. G. Shepherd , G. Ettorre , S. Zaggia

We introduce the Yale-Potsdam Stellar Isochrones (YaPSI), a new grid of stellar evolution tracks and isochrones of solar-scaled composition. In an effort to improve the Yonsei-Yale database, special emphasis is placed on the construction of…

Solar and Stellar Astrophysics · Physics 2017-04-12 F. Spada , P. Demarque , Y. -C. Kim , T. S. Boyajian , J. M. Brewer

We first presented an isochrone database that can be widely used for stellar population synthesis studies and colour-magnitude diagram (CMD) fitting. The database consists of the isochrones of both single star and binary star simple stellar…

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

Helium-burning stars, in particular Cepheids, are especially difficult to model, as the choice of free parameters can greatly impact the shape of the blue loops - the part of the evolutionary track at which instability strip is crossed.…

Solar and Stellar Astrophysics · Physics 2024-08-15 Oliwia Ziółkowska , Radosław Smolec , Anne Thoul , Eoin Farrell , Rajeev Singh Rathour , Vincent Hocdé

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

We present an extended grid of state-of-the art stellar models for low-mass stars including updated physics (nuclear reaction rates, surface boundary condition, mass-loss rate, angular momentum transport, torque and rotation-induced mixing…

Solar and Stellar Astrophysics · Physics 2019-10-23 L. Amard , A. Palacios , C. Charbonnel , F. Gallet , C. Georgy , N. Lagarde , L. Siess

Stellar evolution calculations with variable abundance ratios were used to gauge the effects on temperatures, luminosities, and lifetimes in various phases. Individual elements C, N, O, Mg, Si, and Fe were included. Most of the effect…

Astrophysics of Galaxies · Physics 2022-02-09 Guy Worthey , Xiang Shi , Tathagata Pal , Hyun-chul Lee , Baitian Tang

Absolute ages of young stars are important for many issues in pre-main sequence stellar and circumstellar evolution but are long recognized as difficult to derive and calibrate. In this paper, we use literature spectral types and photometry…

Solar and Stellar Astrophysics · Physics 2015-08-06 Gregory J. Herczeg , Lynne A. Hillenbrand