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Rapid binary population synthesis codes are often used to investigate the evolution of compact-object binaries. They typically rely on analytical fits of single-star evolutionary tracks and parameterized models for interactive phases of…

High Energy Astrophysical Phenomena · Physics 2021-12-08 Monica Gallegos-Garcia , Christopher P L Berry , Pablo Marchant , Vicky Kalogera

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

Binaries comprised of a neutron star (NS) and a black hole (BH) have so far eluded observations as pulsars and with gravitational waves (GWs). We model the formation and evolution of these NS+BH binaries - including pulsar evolution - using…

High Energy Astrophysical Phenomena · Physics 2021-04-21 Debatri Chattopadhyay , Simon Stevenson , Jarrod R. Hurley , Matthew Bailes , Floor Broekgaarden

The rapid rotation of Be stars is supposed to mainly originate from binary evolution. In recent years, more and more Be stars with helium (He) star companions have been discovered, which provides a significant opportunity to study binary…

Solar and Stellar Astrophysics · Physics 2025-07-16 Yuchen Bao , Zhenwei Li , Hongwei Ge , Xuefei Chen , Zhanwen Han

In recent years, observations have shown that multiple-star systems such as hierarchical triple and quadruple-star systems are common, especially among massive stars. They are potential sources of interesting astrophysical phenomena such as…

Solar and Stellar Astrophysics · Physics 2021-02-19 Adrian S. Hamers , Antti Rantala , Patrick Neunteufel , Holly Preece , Pavan Vynatheya

The detection of gravitational wave events has stimulated theoretical modeling of the formation and evolution of double compact objects (DCOs). However, even for the most studied isolated binary evolution channel, there exist large…

High Energy Astrophysical Phenomena · Physics 2024-02-08 Zhu-Ling Deng , Xiang-Dong Li , Yong Shao , Kun Xu

The study of stellar populations is a discipline that is highly dependent on both imaging and spectroscopy. I discuss techniques in different regimes of resolving power: broadband imaging (R~4), intermediate band imaging (R~16, 64),…

Astrophysics · Physics 2009-11-13 Joss Bland-Hawthorn

We examine contributions of second order physical processes to results of stellar evolution calculations amenable to direct observational testing. In the first paper in the series (Young et al. 2001) we established baseline results using…

Astrophysics · Physics 2009-11-10 Patrick A. Young , David Arnett

The binary fraction of a stellar population can have pronounced effects on its properties, and in particular the number counts of different massive star types, and the relative subtype rates of the supernovae which end their lives. Here we…

Solar and Stellar Astrophysics · Physics 2020-07-29 E. R. Stanway , J. J. Eldridge , A. A. Chrimes

In this chapter we review the various suggested channels for the formation and evolution of blue straggler stars (BSSs) in different environments and their observational predictions. These include mass transfer during binary stellar…

Solar and Stellar Astrophysics · Physics 2015-06-22 Hagai B. Perets

Knowledge of the binary population in stellar groupings provides important information about the outcome of the star forming process in different environments (see, e.g., Blaauw 1991, and references therein). Binarity is also a key…

Single-star stellar population (ssSSP) models are usually used for stellar population studies. However, more than 50% of stars are in binaries and evolve differently from single stars. This suggests that the effects of binary interactions…

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

We study the LISA sources that arise from isolated binary evolution, and how these depend on age and metallicity, using model stellar populations from BPASS. We model these as single-aged populations which are analogous to star clusters. We…

General Relativity and Quantum Cosmology · Physics 2023-08-03 Wouter G. J. van Zeist , J. J. Eldridge , Petra N. Tang

In this work, we present an updated prescription of contemporary tidal dissipation theory adapted for rapid binary population synthesis. Our simplified expressions encode the dependence of tidal dissipation on stellar structure,…

Solar and Stellar Astrophysics · Physics 2026-02-17 Veome Kapil , Ilya Mandel , Evgeni Grishin , Jim Fuller , Jeff Riley , Emanuele Berti

We present here a new set of evolutionary population synthesis models for template galaxies along the Hubble morphological sequence. The models, that account for the individual evolution of the bulge, disk, and halo components, provide…

Astrophysics · Physics 2009-11-11 Alberto Buzzoni

Narrow-band imaging surveys allow the study of the spectral characteristics of galaxies without the need of performing their spectroscopic follow-up. In this work, we forward-model the Physics of the Accelerating Universe Survey (PAUS)…

Using evolutionary population synthesis we present integrated colours, integrated spectral energy distributions and absorption-line indices defined by the Lick Observatory image dissector scanner (referred to as Lick/IDS) system, for an…

Astrophysics · Physics 2007-05-23 Fenghui Zhang , Zhanwen Han , Lifang Li , Jarrod R. Hurley

We present an extension of the pop-cosmos model for the evolving galaxy population up to redshift $z\sim6$. The model is trained on distributions of observed colors and magnitudes, from 26-band photometry of $\sim420,000$ galaxies in the…

We build the Yunnan-III evolutionary population synthesis (EPS) models by using the MESA stellar evolution code, BaSeL stellar spectra library and the initial mass functions (IMFs) of Kroupa and Salpeter, and present colours and integrated…

Solar and Stellar Astrophysics · Physics 2015-06-11 F. Zhang , L. Li , Z. Han , Y. Zhuang , X. Kang

The complexity of composite spectra of close binaries makes the study of the individual stellar spectra extremely difficult. For this reason there exists very little information on the chemical composition of high-mass stars in close…

Solar and Stellar Astrophysics · Physics 2010-10-18 K. Pavlovski , J. Southworth , E. Tamajo , V. Kolbas