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The cornerstone mission of the European Space Agency, Gaia, has revealed properties of 260 000 white dwarfs in the Galaxy, allowing us for the first time to constrain the evolution of white dwarfs with a large sample. Complementary surveys…

Solar and Stellar Astrophysics · Physics 2020-10-12 Nadège Lagarde , Céline Reylé

The evolution of binary stellar systems involves a wide range of physical processes, many of which are not yet well understood. We aim to build a general-purpose algorithm based on inverse population synthesis techniques, able to…

Solar and Stellar Astrophysics · Physics 2025-06-11 Santiago Torres , Marta Gili , Alberto Rebassa-Mansergas , Alejandro Santos-García , Alex J. Brown , Steven G. Parsons

Accumulation of new data on stellar hierarchical systems and the progress in numerical simulations of their formation open the door to genetic classification of these systems, where properties of a certain group (family) of objects are…

Solar and Stellar Astrophysics · Physics 2021-09-21 Andrei Tokovinin

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

Multi-dimensional breakage is a ubiquitous phenomenon in natural systems, yet the systematic discovery of underlying governing equations remains a long-standing challenge. Current inverse solution techniques are restricted to…

Computational Engineering, Finance, and Science · Computer Science 2025-08-20 Suet Lin Leong , Firnaaz Ahamed , Yong Kuen Ho

We present inversion techniques aiming at recovering the stellar content (age, metallicity, extinction) and kinematics of a stellar population from its absorption line spectrum. These techniques use new synthetic high resolution spectra…

Astrophysics · Physics 2007-05-23 P. Ocvirk , C. Pichon , A. Lancon

We explore chemically homogeneous evolution (CHE) as a formation channel for massive merging binary black holes (BBHs). We develop methods to include CHE in a rapid binary population synthesis code, Compact Object Mergers: Population…

Solar and Stellar Astrophysics · Physics 2021-05-26 Jeff Riley , Ilya Mandel , Pablo Marchant , Ellen Butler , Kaila Nathaniel , Coenraad Neijssel , Spencer Shortt , Alejandro Vigna-Gomez

The aim of this review is to describe the nature, formation and evolution of the three kinds of high mass X-ray binary (HMXB) population: i. systems hosting Be stars (BeHMXBs), ii. systems accreting the stellar wind of supergiant stars…

High Energy Astrophysical Phenomena · Physics 2011-07-04 Sylvain Chaty

Stellar clusters are thought to be the simplest stellar systems and the closest observational counterparts to theoretical models for single stellar populations. Progress in our understanding of the atmospheres and evolution of massive stars…

Astrophysics · Physics 2007-05-23 Claus Leitherer

We present MCSED, a new spectral energy distribution (SED)-fitting code, which mates flexible stellar evolution calculations with the Markov Chain Monte Carlo algorithms of the software package emcee. MCSED takes broad, intermediate, and…

Massive stars exhibit a perplexing mismatch between their inferred masses from different observational techniques, posing a significant challenge to our understanding of stellar evolution and structure. This discrepancy is believed to be…

Solar and Stellar Astrophysics · Physics 2025-10-07 C. I. Eze , G. Handler , F. Kahraman Aliçavuş , T. Pawar , A. Miszuda

Chemical evolution models are powerful tools for interpreting stellar abundance surveys and understanding galaxy evolution. However, their predictions depend heavily on the treatment of inflow, outflow, star formation efficiency (SFE), the…

Astrophysics of Galaxies · Physics 2017-02-08 Brett H. Andrews , David H. Weinberg , Ralph Schönrich , Jennifer A. Johnson

The majority of massive stars are formed in multiple systems and will interact with companions via mass transfer. This interaction typically leads to the primary shedding its envelope and the formation of a "stripped star". Classically,…

Solar and Stellar Astrophysics · Physics 2024-07-17 Debasish Dutta , Jakub Klencki

We perform binary population synthesis calculations to investigate the incidence of low-mass X-ray binaries and their birth rate in the Galaxy. We use a binary evolution algorithm that models all the relevant processes including tidal…

Astrophysics · Physics 2009-11-11 Paul D. Kiel , Jarrod R. Hurley

We describe the public release of the Cluster Monte Carlo Code (CMC) a parallel, star-by-star $N$-body code for modeling dense star clusters. CMC treats collisional stellar dynamics using H\'enon's method, where the cumulative effect of…

Information about the last stages of a binary neutron star inspiral and the final merger can be extracted from quasi-equilibrium configurations and dynamical evolutions. In this article, we construct quasi-equilibrium configurations for…

Be stars are rapidly rotating B type stars. The origin of their rapid rotation is not certain, but binary interaction remains to be a possibility. In this work we investigate the formation of Be stars resulting from mass transfer in…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Yong Shao , Xiang-Dong Li

We investigate Roche lobe overflow mass transfer (MT) in eccentric binary systems between stars and compact objects (COs), modeling the coupled evolution of both the star and the orbit due to eccentric MT (eMT) in a self-consistent…

The evolution of massive stars in general, massive close binaries in particular depend on processes where, despite many efforts, the physics are still uncertain. Here we discuss the effects of stellar wind as function of metallicity during…

Astrophysics · Physics 2007-05-23 D. Vanbeveren

The fraction of stars in binary systems within star clusters is important for their evolution, but what proportion of binaries form by dynamical processes after initial stellar accretion remains unknown. In previous work, we showed that…

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