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[Abridged]. We present SEDs for single-age, single-metallicity stellar populations (SSPs) covering the optical range at resolution 2.3A (FWHM). These SEDs constitute our base models, as they combine scaled-solar isochrones with MILES…

Cosmology and Nongalactic Astrophysics · Physics 2010-04-27 A. Vazdekis , P. Sánchez-Blázquez , J. Falcón-Barroso , A. J. Cenarro , M. A. Beasley , N. Cardiel , J. Gorgas , R. F. Peletier

The cornerstone mission Gaia, together with complementary surveys, will revolutionize our understanding of the formation and history of our Galaxy, providing accurate stellar masses, radii, ages, distances, as well as chemical properties…

Solar and Stellar Astrophysics · Physics 2017-04-26 N. Lagarde , A. C. Robin , C. Reylé , G. Nasello

In this brief proceedings article I summarize the review talk I gave at the IAU 246 meeting in Capri, Italy, glossing over the well-known results from the literature, but paying particular attention to new, previously unpublished material.…

Astrophysics · Physics 2009-11-13 John M. Fregeau

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

The code IAC-star is presented. It generates synthetic HR and color-magnitude diagrams (CMDs) and is mainly aimed to star formation history studies in nearby galaxies. Composite stellar populations are calculated on a star by star basis, by…

Astrophysics · Physics 2014-10-13 A. Aparicio , C. Gallart

We present re-processed flux calibrated spectra of 406 stars from the UVES-POP stellar library in the wavelength range 320-1025 nm, which can be used for stellar population synthesis. The spectra are provided in the two versions having…

Around the turn of the last century, star clusters of all kinds were considered "simple" stellar populations. Over the past decade, this situation has changed dramatically. At the same time, star clusters are among the brightest stellar…

Solar and Stellar Astrophysics · Physics 2018-01-17 Richard de Grijs , Chengyuan Li

Context. The majority of massive stars are born with a close binary companion. How this affects their evolution and fate is still largely uncertain, especially at low metallicity. Aims. We derive synthetic populations of massive…

We conduct binary population synthesis to investigate the formation of wind-fed high-mass X-ray binaries containing black holes (BH-HMXBs). We evolve multiple populations of high-mass binary stars and consider BH-HMXB formation rates,…

High Energy Astrophysical Phenomena · Physics 2023-06-28 Isobel M. Romero-Shaw , Ryosuke Hirai , Arash Bahramian , Reinhold Willcox , Ilya Mandel

Models of stellar population synthesis (SPS) are the fundamental tool that relates the physical properties of a galaxy to its spectral energy distribution (SED). In this paper, we present DSPS: a python package for stellar population…

Astrophysics of Galaxies · Physics 2023-02-20 Andrew P. Hearin , Jonás Chaves-Montero , Alex Alarcon , Matthew R. Becker , Andrew Benson

Catalogs of stellar-mass compact binary systems detected by ground-based gravitational-wave instruments (such as Advanced LIGO and Advanced Virgo) will offer insights into the demographics of progenitor systems and the physics guiding…

High Energy Astrophysical Phenomena · Physics 2018-10-24 Stephen R. Taylor , Davide Gerosa

X-ray binaries play a significant role in the thermal and ionization history of galaxies. Their X-ray luminosity can shed light on galactic star formation rates and histories. Compact objects are also crucial in the evolution of…

High Energy Astrophysical Phenomena · Physics 2025-08-27 J. C. Bray , E. R. Stanway , J. J. Eldridge

Using a population synthesis technique, we have calculated detailed models of the present-day field population of objects that have resulted from the merger of a giant primary and a main-sequence or brown dwarf secondary during…

Solar and Stellar Astrophysics · Physics 2015-05-19 Michael Politano , Marc van der Sluys , Ronald E. Taam , Bart Willems

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

Future big surveys are going to provide many targets of rare compact binary populations that will require photometric and spectroscopic follow-up to use them to answer questions on the formation and evolution of compact binaries, their…

Instrumentation and Methods for Astrophysics · Physics 2010-09-10 Paul J. Groot

Recent progress in our knowledge of stellar populations in local dwarf spheroidal galaxies is briefly discussed. A few results are summarized including wide field observations of stellar populations and their spatial variations, studies of…

Astrophysics · Physics 2009-11-11 Enrico V. Held

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

We report on the impact of a probabilistic prescription for compact remnant masses and kicks on massive binary population synthesis. We find that this prescription populates the putative mass gap between neutron stars and black holes with…

High Energy Astrophysical Phenomena · Physics 2020-11-13 Ilya Mandel , Bernhard Mueller , Jeff Riley , Selma E. de Mink , Alejandro Vigna-Gomez , Debatri Chattopadhyay

The discovery and characteristics of transneptunian binaries are reviewed. In the 20 years since their first discovery, a wealth of detail has emerged including the frequency of binaries in different populations, their relative sizes and…

Earth and Planetary Astrophysics · Physics 2020-02-19 Keith S. Noll , William M. Grundy , David Nesvorny , Audrey Thirouin

The predicted and observed space density of cataclysmic variables (CVs) have been for a long time discrepant by at least an order of magnitude. The standard model of CV evolution predicts that the vast majority of CVs should be period…

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