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Connecting star and planet properties in a single model is not straightforward. Stellar population synthesis models are key to explore combined statistical constraints from stars and planets observations. The Besan\c{c}on stellar population…

Earth and Planetary Astrophysics · Physics 2019-02-21 Cabral Nahuel , Nadège Lagarde , Céline Reylé , Aurélie Guilbert-Lepoutre , Annie C. Robin

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…

Stellar population synthesis is a crucial methodology in astrophysics, enabling the interpretation of the integrated light of galaxies and stellar clusters. By combining empirical and/or theoretical libraries of the spectral energy…

Instrumentation and Methods for Astrophysics · Physics 2025-07-30 Pablo Corcho-Caballero , Yago Ascasibar , Daniel Jiménez-López

The observed samples of supernovae (SN) and double compact objects (DCOs) provide several critical constraints on population-synthesis models: the parameters of these models must be carefully chosen to reproduce, among other factors, (i)…

Astrophysics · Physics 2010-11-11 R. O'Shaughnessy , C. Kim , V. Kalogera , K. Belczynski

Massive binaries are vital sources of various transient processes, including gravitational-wave mergers. However, large uncertainties in the evolution of massive stars, both physical and numerical, present a major challenge to the…

Solar and Stellar Astrophysics · Physics 2023-08-09 Poojan Agrawal , Jarrod Hurley , Simon Stevenson , Carl L. Rodriguez , Dorottya Szecsi , Alex Kemp

We estimate the observed distribution of chirp masses of compact object binaries for the gravitational wave detectors. The stellar binary evolution is modeled using the {\em StarTrack} population synthesis code. The distribution of the…

Astrophysics · Physics 2009-11-07 T. Bulik , K. Belczynski

We review recent advances in the study of binary star formation that have been made using the smoothed particle hydrodynamics (SPH) technique. We discuss the importance of ensuring that the Jeans mass is always resolved during a…

Astrophysics · Physics 2007-05-23 Matthew R. Bate

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

Uncertainties in stellar population models, both in terms of stellar evolution and stellar spectra, translate into uncertainties in our interpretation of stellar populations in galaxies, since stars are the source of most of the light we…

Astrophysics of Galaxies · Physics 2023-03-31 C. M. Byrne , E. R. Stanway

We performed a near-infrared (NIR, $\sim$1.0$\mu$m-2.4$\mu$m) stellar population study in a sample of early type galaxies. The synthesis was performed using five different evolutionary population synthesis libraries of models. Our main…

The luminosity and spectral energy distribution (SED) of high-$z$ galaxies are sensitive to the stellar population synthesis (SPS) models. In this paper, we study the effects of different SPS models on the measurements of high-$z$ galaxies…

Astrophysics of Galaxies · Physics 2024-05-06 Peiai Liu , Qingbo Ma , Yunkun Han , Rongxin Luo

The stellar population in the Galactic halo is characterised by a large fraction of CEMP stars. Most CEMP stars are enriched in $s$-elements (CEMP-$s$ stars), and some of these are also enriched in $r$-elements (CEMP-$s/r$ stars). One…

Solar and Stellar Astrophysics · Physics 2015-09-02 C. Abate , O. R. Pols , R. J. Stancliffe , R. G. Izzard , A. I. Karakas , T. C. Beers , Y. S. Lee

Our understanding of massive stars remains incomplete. Many high-z galaxies and nearby analogs exhibit strong He II emission, indicating an abundance of photons with energies >54.4 eV that standard single-star population models cannot…

Astrophysics of Galaxies · Physics 2025-11-24 Beryl Hovis-Afflerbach , Allison L. Strom , Alberto Saldana-Lopez , Sophia R. Flury

A new method is presented to describe the evolution of the orbital-parameter distributions for an initially universal binary population in star clusters by means of the currently largest existing library of N-body models. It is demonstrated…

Astrophysics of Galaxies · Physics 2015-05-28 Michael Marks , Pavel Kroupa , Seungkyung Oh

Subdwarf B stars (sdBs) can significantly change the ultraviolet spectra of populations at age t~1Gyr, and have been even included in the volutionary population synthesis (EPS) models by Han et al. (2007). In this study we present the…

Solar and Stellar Astrophysics · Physics 2010-06-24 F. Zhang , Z. Han , L. Li , Y. Zhang , J. Guo

We introduce version two of the fast star cluster evolution code Evolve Me A Cluster of StarS (EMACSS). The first version (Alexander & Gieles) assumed that cluster evolution is balanced for the majority of the life-cycle, meaning that the…

Astrophysics of Galaxies · Physics 2015-06-17 Mark Gieles , Poul Alexander , Henny Lamers , Holger Baumgardt

Rapid progress is now being made in the study of stellar populations of galaxies at large lookback times, both in dense clusters and the field. Dramatic transformations in star formation histories (even morphologies) appear to prevail among…

Astrophysics · Physics 2009-10-31 Robert W. O'Connell

Binary populations in young star clusters show multiplicity fractions both lower and up to twice as high as those observed in the Galactic field. We follow the evolution of a population of binary stars in dense and loose star clusters…

Astrophysics of Galaxies · Physics 2015-06-05 Michael Marks , Pavel Kroupa

[abridged] The galactic field's late-type stellar single and binary population is calculated on the supposition that all stars form as binaries in embedded star clusters. A recently developed tool (Marks, Kroupa & Oh) is used to evolve the…

Astrophysics of Galaxies · Physics 2015-05-30 Michael Marks , Pavel Kroupa

We briefly review some constraints (Owing to the limited number of pages of present review, only a sub-sample of the topics discussed during the talk are briefly summarized. For the interested readers we are pleased to send them upon…

Astrophysics · Physics 2009-11-13 S. Cassisi