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Microlensing is one of the most promising methods of reconstructing the stellar mass function down to masses even below the hydrogen-burning limit. The fundamental limit to this technique is the presence of unresolved binaries, which can in…

Astrophysics · Physics 2009-10-28 B. Scott Gaudi , Andrew Gould

Results are presented on component masses and system angular momenta for over a hundred low-temperature contact binaries. It is found that the secondary components in close binary systems are very similar in mass. Our observational evidence…

Astrophysics · Physics 2009-11-11 K. D. Gazeas , P. G. Niarchos

The stability criteria of rapid mass transfer and common-envelope evolution are fundamental in binary star evolution. They determine the mass, mass ratio, and orbital distribution of many important systems, such as X-ray binaries, type Ia…

Solar and Stellar Astrophysics · Physics 2024-11-27 Hongwei Ge , Zhanwen Han

The distribution of the light-variation amplitudes, A(a), in addition to determining the number of undiscovered contact binary systems falling below photometric detection thresholds and thus lost to statistics, can serve as a tool in…

Astrophysics · Physics 2009-11-06 Slavek M. Rucinski

We discuss the first available binary evolution models which include up-to-date rotational physics for both components, as well as angular momentum accretion and spin-orbit coupling. These models allow a self-consistent computation of the…

Astrophysics · Physics 2007-05-23 N. Langer , S. -C. Yoon , J. Petrovic , A. Heger

Binary evolution is indispensable in stellar evolution to understand the formation and evolution of most peculiar and energetic objects, such as binary compact objects, Type Ia supernovae, X-ray binaries, cataclysmic variables, blue…

Solar and Stellar Astrophysics · Physics 2020-07-15 Hongwei Ge , Ronald F Webbink , Zhanwen Han

Rapid binary population synthesis codes are often used to investigate the evolution of compact-object binaries. They typically rely on analytical fits of single-star evolutionary tracks and parameterized models for interactive phases of…

High Energy Astrophysical Phenomena · Physics 2021-12-08 Monica Gallegos-Garcia , Christopher P L Berry , Pablo Marchant , Vicky Kalogera

Using state-of-the-art dynamical simulations of globular clusters, including radiation reaction during black hole encounters and a cosmological model of star cluster formation, we create a realistic population of dynamically-formed binary…

High Energy Astrophysical Phenomena · Physics 2018-12-26 Carl L. Rodriguez , Pau Amaro-Seoane , Sourav Chatterjee , Kyle Kremer , Frederic A. Rasio , Johan Samsing , Claire S. Ye , Michael Zevin

We present a new estimate for the binary fraction (the fraction of stars with a single companion) for M dwarfs using a log-normal fit to the orbital separation distribution. We use point estimates of the binary fraction (binary fractions…

Solar and Stellar Astrophysics · Physics 2022-01-19 Nicholas Susemiehl , Michael R. Meyer

Numerical-relativity simulations offer a unique approach to investigating the dynamics of binary neutron star mergers and provide the most accurate predictions of waveforms in the late inspiral phase. However, the numerical predictions are…

General Relativity and Quantum Cosmology · Physics 2025-06-04 Hao-Jui Kuan , Ivan Markin , Maximiliano Ujevic , Tim Dietrich , Kenta Kiuchi , Masaru Shibata , Wolfgang Tichy

In a previous publication [Atomic Data and Nuclear Data Tables 75, 1 (2000)], we had given seven parameter analytical fits to theoretical reaction rates derived from nuclear cross sections calculated in the statistical model…

Nuclear Theory · Physics 2009-11-07 T. Rauscher , F. -K. Thielemann

The next observing runs of advanced gravitational-wave detectors will lead to a variety of binary neutron star detections and numerous possibilities for multi-messenger observations of binary neutron star systems. In this context a clear…

General Relativity and Quantum Cosmology · Physics 2022-08-31 Maximilian Kölsch , Tim Dietrich , Maximiliano Ujevic , Bernd Bruegmann

On the basis of monotonic orbital-period variations, this study aims to identify genuine relationships between binary parameters and the rates of mass transfer (MT), mass loss (ML), and angular momentum loss (AML). Sample binaries with…

Solar and Stellar Astrophysics · Physics 2025-11-18 Shinjirou Kouzuma

We study mass loss from the outer Lagrange point (L2) in binary stellar mergers and their luminous transients by means of radiative hydrodynamical simulations. Previously, we showed that for binary mass ratios 0.06 < q < 0.8, synchronous L2…

Solar and Stellar Astrophysics · Physics 2016-07-28 Ondrej Pejcha , Brian D. Metzger , Kengo Tomida

Nucleon total reaction and neutron total cross sections to 300 MeV for 12C and 208Pb, and for 65 MeV spanning the mass range, are predicted using coordinate space optical potentials formed by full folding of effective nucleon-nucleon…

Nuclear Theory · Physics 2009-11-07 P. K. Deb , K. Amos , S. Karataglidis , M. B. Chadwick , D. G. Madland

Binary galaxies are modeled as point-masses obeying the non-Newtonian MOND and Mannheim-Kazanas (MKG) theories of gravity. Random samples of such systems are generated by means of Monte Carlo simulations of binary orbits. Model pairs have…

Astrophysics · Physics 2011-05-23 D. S. L. Soares

We present a method for fitting orbit-superposition models to the kinematics of discrete stellar systems when the available stellar sample has been filtered by a known selection function. The fitting method can be applied to any model in…

Astrophysics of Galaxies · Physics 2019-01-23 John Magorrian

The binomial acceptance correction procedure is studied for particle number distributions detected in high energy reactions in finite regions of the momentum space. We present acceptance correction formulas for scaled variance, skewness,…

High Energy Physics - Phenomenology · Physics 2020-03-25 Oleh Savchuk , Roman V. Poberezhnyuk , Volodymyr Vovchenko , Mark I. Gorenstein

Within the next decade, ground based gravitational wave detectors are in principle capable of determining the compact object merger rate per unit volume of the local universe to better than 20% with more than 30 detections. We argue that…

Astrophysics · Physics 2015-05-13 R. O'Shaughnessy , R. Kopparapu , K. Belczynski

Using near-infrared speckle interferometry we have obtained resolved JHK-photometry for the components of 58 young binary systems. From these measurements, combined with other data taken from literature, we derive masses and particularly…

Astrophysics · Physics 2009-11-06 Jens Woitas , Christoph Leinert , Rainer K"ohler