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Most massive stars are members of a binary or a higher-order stellar systems, where the presence of a binary companion can decisively alter their evolution via binary interactions. Interacting binaries are also important astrophysical…

We analyse the stellar content of a large number of HII galaxies from the continua and absorption features of their spectra using population synthesis methods, in order to gain information about the star formation histories of these…

Astrophysics · Physics 2009-11-10 P. Westera , F. Cuisinier , E. Telles , C. Kehrig

We apply probabilistic generative modelling of colour-magnitude diagrams to six young Galactic open star clusters and determine their mass functions, binary mass-ratio distributions, and the frequencies of binary stars. We find that younger…

Astrophysics of Galaxies · Physics 2024-11-26 Jason Alexander , Michael Albrow

Using the StarTrack binary population synthesis code we investigate the properties of population of compact object binaries. Taking into account the selection effects we calculate the expected properties of the observed binaries.We analyze…

Astrophysics · Physics 2009-11-10 T. Bulik , K. Belczynski

We compare the results of three binary population synthesis codes to understand the differences in their results. As a first result we find that when equalizing the assumptions the results are similar. The main differences arise from…

Solar and Stellar Astrophysics · Physics 2012-11-06 J. S. W. Claeys , S. Toonen , N. Mennekens

There are important but unresolved processes in the standard formation scenarios of double compact star binaries (DCBs; BH-BH, BH-NS, NS-NS systems), such as mass transfer and the common envelope (CE) phase. We analyze the effects of…

High Energy Astrophysical Phenomena · Physics 2018-10-29 Iminhaji Ablimit , Keiichi Maeda

It is now clear that central star binarity plays a key role in the formation and evolution of planetary nebulae, with a significant fraction playing host to close-binary central stars which have survived one or more common envelope…

Solar and Stellar Astrophysics · Physics 2018-10-26 David Jones

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…

We present results constraining the multiplicity of the very low mass stars and sub-stellar objects in the Orion Nebula Cluster (ONC). Our sample covers primary masses 0.012-0.1M$_{\odot}$ using archival Hubble Space Telescope data obtained…

Solar and Stellar Astrophysics · Physics 2022-02-09 Matthew De Furio , Michael R. Meyer , Megan Reiter , John Monnier , Adam Kraus , Trent Dupuy

We present a simple model of binary star formation based on the assumption that rotating prestellar cores collapse to form rings and these rings then fragment into protostars. We assume that each ring spawns a small number (N <= 6) of…

Astrophysics · Physics 2009-11-10 D. A. Hubber , A. P. Whitworth

The growing number of gravitational-wave detections from binary black holes enables increasingly precise measurements of their population properties. The observed population is most likely drawn from multiple formation channels.…

High Energy Astrophysical Phenomena · Physics 2025-08-28 Storm Colloms , Christopher P L Berry , John Veitch , Michael Zevin

We present a comprehensive description of the population synthesis code StarTrack. The original code has been significantly modified and updated. Special emphasis is placed here on processes leading to the formation and further evolution of…

Astrophysics · Physics 2009-11-11 K. Belczynski , V. Kalogera , F. A. Rasio , R. E. Taam , A. Zezas , T. Bulik , T. J. Maccarone , N. Ivanova

The frequency of planets in binaries is an important issue in the field of extrasolar planet studies, because of its relevance in estimating of the global planet population of our Galaxy and the clues it can give to our understanding of…

Astrophysics · Physics 2009-11-13 M. Bonavita , S. Desidera

The discovery of multiple stellar populations in globular clusters raises fundamental questions concerning the formation and dynamical history of these systems. In a previous study aimed at exploring the formation of second-generation (SG)…

Astrophysics of Galaxies · Physics 2015-05-28 Enrico Vesperini , Stephen L. W. McMillan , Francesca D'Antona , Annibale D'Ercole

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

Galactic binaries are expected to be the most numerous LISA sources and to produce a stochastic gravitational-wave foreground whose spectral shape encodes information about the underlying population. Extracting this information with…

High Energy Astrophysical Phenomena · Physics 2026-05-12 Federico De Santi , Alessandro Santini , Alexandre Toubiana , Nikolaos Karnesis , Davide Gerosa

Binary population synthesis (BPS) is an essential tool for extracting information about massive binary evolution from gravitational-wave (GW) detections of compact object mergers. It has been successfully used to constrain the most likely…

High Energy Astrophysical Phenomena · Physics 2024-11-27 L. M. de Sá , A. Bernardo , L. S. Rocha , R. R. A. Bachega , J. E. Horvath

We perform a systematic study of merging black hole (BH) binaries with compact star (CS) companions, including black hole--white dwarf (BH--WD), black hole--neutron star (BH--NS) and black hole--black hole (BH--BH) systems. Previous studies…

High Energy Astrophysical Phenomena · Physics 2021-10-27 Yong Shao , Xiang-Dong Li

We present the results of a survey of N-body simulations aimed at exploring the evolution of compact binaries in multiple-population globular clusters.We show that as a consequence of the initial differences in the structural properties of…

We study the formation of massive Population III binary stars using a newly developed radiation hydrodynamics code with the adaptive mesh refinement and adaptive ray-tracing methods. We follow the evolution of a typical primordial…

Astrophysics of Galaxies · Physics 2020-06-16 Kazuyuki Sugimura , Tomoaki Matsumoto , Takashi Hosokawa , Shingo Hirano , Kazuyuki Omukai