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The formation and evolution of binaries which contain two neutron stars or a neutron star with a black hole are discussed in detail. The evolution of the distributions in orbital period and eccentricity for neutron star binaries are studied…

Astrophysics · Physics 2016-08-30 Simon F. Portegies Zwart , Lev R. Yungelson

Scalar boson stars have attracted attention as simple models for exploring the nonlinear dynamics of a large class of ultra compact and black hole mimicking objects. Here, we study the impact of interactions in the scalar matter making up…

General Relativity and Quantum Cosmology · Physics 2023-06-14 Nils Siemonsen , William E. East

We give a brief overview of where we stand with respect to some old and new questions bearing on how massive stars evolve and end their lifetime. We focus on the following key points that are further discussed by other contributions during…

Solar and Stellar Astrophysics · Physics 2017-11-15 Georges Meynet , André Maeder , Cyril Georgy , Sylvia Ekström , Patrick Eggenberger , Fabio Barblan , Han Feng Song

We discuss the influence of tidal spin-orbit interactions on the orbital dynamics of close intermediate-mass X-ray binaries. In particular we consider here a process in which spin angular momentum of a contracting RLO donor star, in a…

Astrophysics · Physics 2007-05-23 T. M. Tauris , G. J. Savonije

The presence of multiple stellar populations in globular clusters leads to a complex dynamical environment that significantly influences the evolution of binary stars, which in turn impacts the evolution of the cluster itself. For this…

Astrophysics of Galaxies · Physics 2026-02-10 J. Bruce , E. Vesperini , A. Askar , E. Bortolan , M. Giersz , J. Hong , A. Hypki , A. P. Milone

We review the current basic picture of the evolution of massive stars and how their evolution and structure changes as a function of initial mass. We give an overview of the fate of modern (Pop I) and primordial (Pop III) stars with…

Astrophysics · Physics 2009-11-07 A. Heger , S. E. Woosley , C. L. Fryer , N. Langer

I investigate the roles of cluster dynamics and massive binary evolution in producing stellar-remnant binary black hole (BBH) mergers over the cosmic time. To that end, dynamical BBH mergers are obtained from long-term direct N-body…

High Energy Astrophysical Phenomena · Physics 2022-01-19 Sambaran Banerjee

Interacting binaries are of general interest as laboratories for investigating the physics of accretion, which gives rise to the bulk of high-energy radiation in the Galaxy. They allow us to probe stellar evolution processes that cannot be…

High Energy Astrophysical Phenomena · Physics 2021-07-22 Sophie Lund Schrøder , Morgan MacLeod , Enrico Ramirez-Ruiz , Ilya Mandel , Tassos Fragos , Abraham Loeb , Rosa Wallace Everson

Stellar mergers are responsible for a large variety of astrophysical phenomena. They form blue straggler stars, give rise to spectacular transients, and produce some of the most massive stars in the Universe. Here, we focus on mergers from…

Solar and Stellar Astrophysics · Physics 2025-09-24 Fabian R. N. Schneider

The evolution of close binary stars in mass asymmetry (transfer) coordinate is considered. The conditions for the formation of stable symmetric binary stars are analyzed. The role of symmetrization of asymmetric binary star in the…

Solar and Stellar Astrophysics · Physics 2019-02-20 V. V. Sargsyan , H. Lenske , G. G. Adamian , N. V. Antonenko

Stars like company. They are mostly formed in clusters and their lives are often altered by the presence of one or more companions. Interaction processes between components may lead to complex outcomes like Algols, blue stragglers,…

Solar and Stellar Astrophysics · Physics 2023-11-17 Thibault Merle

In the present review we summarize direct and indirect evidence that the massive close binary frequency is very large. We then discuss the binary evolutionary processes and we present a general massive close binary evolutionary scheme.…

Astrophysics · Physics 2009-11-07 Dany Vanbeveren

In this paper, I present and discuss some recent observational results which may have important implications for our understanding of late phases of binary evolution.

Solar and Stellar Astrophysics · Physics 2018-03-14 J. Mikołajewska

Although the association of gamma-ray bursts with massive stellar death is on firm footing, the nature of the progenitor system and the key ingredients required for a massive star to produce a gamma-ray burst remain open questions. Here, we…

High Energy Astrophysical Phenomena · Physics 2026-04-21 Angel Hernandez , Roseanne M. Cheng , Nicole M. Lloyd-Ronning , Carl E. Fields

Here we discuss the evolution of binaries around MBH in nuclear stellar clusters. We focus on their secular evolution due to the perturbation by the MBH, while simplistically accounting for their collisional evolution. Binaries with highly…

Astrophysics of Galaxies · Physics 2015-06-19 Snezana Prodan , Fabio Antonini , Hagai B. Perets

A large number of mergers of binary black holes (BHs) have been discovered by gravitational wave observations since the first detection of gravitational waves 2015. Binary BH mergers are the loudest events in the universe, however their…

High Energy Astrophysical Phenomena · Physics 2024-03-18 Ataru Tanikawa

We examine some debated points in current discussions about rotating stars: the shape, the gravity darkening, the critical velocities, the mass loss rates, the hydrodynamical instabilities, the internal mixing and N--enrichments. The study…

Solar and Stellar Astrophysics · Physics 2015-06-22 Andre Maeder , Georges Meynet

We compute the isotropic gravitational wave (GW) background produced by binary supermassive black holes (SBHs) in galactic nuclei. In our model, massive binaries evolve at early times via gravitational-slingshot interaction with nearby…

Astrophysics of Galaxies · Physics 2017-05-04 Alexander Rasskazov , David Merritt

At very low metallicity, the effects of differential rotation have a more important impact on the evolution of stars than at high metallicity. Rotational mixing leads to the production of great quantities of helium and of primary $^{14}$N…

Astrophysics · Physics 2007-05-23 Georges Meynet , Raphael Hirschi , Sylvia Ekstrom , Andre Maeder

This review explores the physical mechanisms driving the evolution of low- and intermediate-mass binary star systems, with particular emphasis on emerging mechanisms that challenge classical paradigms. We begin by describing the principal…

Solar and Stellar Astrophysics · Physics 2026-04-30 Lionel Siess