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The population of compact binaries in dense stellar systems is affected strongly by frequent dynamical interactions between stars and their interplay with the stellar evolution. In this contribution, we consider these effects on binaries…

Astrophysics · Physics 2007-05-23 N. Ivanova , F. A. Rasio

The third data release of Gaia introduced a large catalog of astrometric binaries, out of which about 3,200 are likely main-sequence stars with a white-dwarf (WD) companion. These binaries are typically found with orbital separations of ~1…

Solar and Stellar Astrophysics · Physics 2024-07-18 Na'ama Hallakoun , Sahar Shahaf , Tsevi Mazeh , Silvia Toonen , Sagi Ben-Ami

The population statistics of binary stars are an important output of star formation models. However populations of wide binaries evolve over time due to interactions within a system's birth environment and the unfolding of wide,…

Solar and Stellar Astrophysics · Physics 2020-07-08 N. R. Deacon , A. L. Kraus , .

Double white dwarf binaries are an important remnant of binary evolution as they are possible type Ia supernova progenitors and strong sources of gravitational waves in the low-frequency regime. The double-lined double white dwarf (DBL)…

Astrometry from {\it Gaia} DR3 has enabled the discovery of a sample of 3000+ binaries containing white dwarfs (WD) and main-sequence (MS) stars in relatively wide orbits, with orbital periods $P_{\rm orb} = (100-1000)$ d. This population…

Solar and Stellar Astrophysics · Physics 2024-08-19 Natsuko Yamaguchi , Kareem El-Badry , Natalie Rees , Sahar Shahaf , Tsevi Mazeh , René Andrae

The discovery of multiple stellar populations in globular clusters has implications for all the aspects of the study of these stellar systems. In this paper, by means of N-body simulations, we study the evolution of binary stars in…

Binary stars are common in star clusters and galaxies, but the detailed effects of binary evolution are not taken into account in some colour-magnitude diagram (CMD) studies. This paper studies the CMDs of twelve globular clusters via…

Solar and Stellar Astrophysics · Physics 2015-06-12 Zhongmu Li , Caiyan Mao , Ruheng Li , Ruxi Li , Maocai Li

Short-period double white dwarf (DWD) binaries will be the most prolific source of gravitational waves (GWs) for the Laser Interferometer Space Antenna (LISA). DWDs with GW frequencies below $\sim1$ mHz will be the dominant contributor to a…

High Energy Astrophysical Phenomena · Physics 2023-04-05 Sarah Thiele , Katelyn Breivik , Robyn E. Sanderson , Rodrigo Luger

Globular clusters (GCs) display much lower binary fractions than found among main-sequence stars in the solar neighborhood. The physical cause of this difference is debatable: does it reflect different star formation outcomes at low…

Astrophysics of Galaxies · Physics 2026-04-06 Christopher E. O'Connor , Kyle Kremer , Frederic A. Rasio

(abridged) In this paper, we constrain the properties of primordial binary populations in Galactic globular clusters using the MOCCA Monte Carlo code for cluster evolution. Our results are compared to the observations of Milone et al.…

Solar and Stellar Astrophysics · Physics 2015-06-23 Nathan W. C. Leigh , Mirek Giersz , Michael Marks , Jeremy J. Webb , Arkadiusz Hypki , Craig O. Heinke , Pavel Kroupa , Alison Sills

In this third of a series of papers related to cataclysmic variables (CVs) and related objects, we analyse the population of CVs in a set of 12 globular cluster models evolved with the MOCCA Monte Carlo code, for two initial binary…

Astrophysics of Galaxies · Physics 2017-03-07 Diogo Belloni , Mónica Zorotovic , Matthias R. Schreiber , Nathan W. C. Leigh , Mirek Giersz , Abbas Askar

Most globular clusters (GCs) show evidence for multiple stellar populations, suggesting the occurrence of several distinct star-formation episodes. The large fraction of second population (2P) stars observed requires a very large 2P gaseous…

High Energy Astrophysical Phenomena · Physics 2022-06-15 Mor Rozner , Hagai B. Perets

We present the result of a survey of Monte Carlo simulations of globular clusters hosting two generations of stars including a large (f_b=50%) fraction of primordial binaries in both populations. The dynamical evolution of the two stellar…

Solar and Stellar Astrophysics · Physics 2022-03-14 A. Sollima , R. Gratton , S. Lucatello , E. Carretta

We obtain new and precise information on the double white dwarf (DWD) population and on its gravitational-wave-driven merger rate, by combining the constraints on the DWD population from two previous radial-velocity-variation studies: One…

Solar and Stellar Astrophysics · Physics 2018-03-15 Dan Maoz , Na'ama Hallakoun , Carles Badenes

We considered the formation of detached white dwarf main-sequence star (WDMS) binaries through seven evolutionary channels subdivided according to the evolutionary process that gives rise to the formation of the white dwarf or its…

Astrophysics · Physics 2009-11-10 B. Willems , U. Kolb

Interacting binaries containing white dwarfs can lead to a variety of outcomes that range from powerful thermonuclear explosions, which are important in the chemical evolution of galaxies and as cosmological distance estimators, to strong…

We construct from Gaia DR2 an extensive and very pure ($\lesssim 0.2\%$ contamination) catalog of wide binaries containing main-sequence (MS) and white dwarf (WD) components within 200 pc of the Sun. The public catalog contains, after…

Solar and Stellar Astrophysics · Physics 2018-08-15 Kareem El-Badry , Hans-Walter Rix

We examine the applicability of the initial-to-final mass relation (IFMR) for white dwarfs (WDs) in intermediate-separation binary systems (approximately 1 AU), using astrometric binaries identified in open clusters from Gaia DR3. A careful…

Solar and Stellar Astrophysics · Physics 2025-01-30 Oren Ironi , Sagi Ben-Ami , Na'ama Hallakoun , Sahar Shahaf

Context: Globular clusters (GCs) around the Milky Way (MW) are expected to host white dwarf (WD) binaries emitting gravitational waves that could be detectable by LISA. Aims: Our aim is to investigate whether LISA can resolve WD binaries in…

General Relativity and Quantum Cosmology · Physics 2026-01-28 Wouter G. J. van Zeist , Gijs Nelemans , Shu-Xu Yi , Simon F. Portegies Zwart

Context. Understanding the survival and orbital evolution of brown dwarf (BD) companions during the post-main-sequence (MS) evolution of their host stars is increasingly important, especially with recent discoveries of many substellar…

Solar and Stellar Astrophysics · Physics 2026-03-19 Zhangliang Chen , Hongming Jin , Hongwei Ge , Cong Yu , Kejun Wang , Dichang Chen , Bo Ma