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1699 Publications visible to you, out of a total of 1699
Morphology and Mach Number Dependence of Subsonic Bondi–Hoyle Accretion

Abstract

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Authors: Logan J. Prust, Hila Glanz, Lars Bildsten, Hagai B. Perets, Friedrich K. Röpke

Date Published: 29th Apr 2024

Publication Type: Journal

Expansion of Accreting Main-sequence Stars during Rapid Mass Transfer

Abstract (Expand)

Accreting main-sequence stars expand significantly when the mass accretion timescale is much shorter than their thermal timescales. This occurs during mass transfer from an evolved giant star onto a … main-sequence companion in a binary system and is an important phase in the formation of compact binaries including X-ray binaries, cataclysmic variables, and gravitational-wave sources. In this study, we compute 1D stellar models of main-sequence accretors with different initial masses and accretion rates. The calculations are used to derive semianalytical approximations to the maximum expansion radius. We assume that mass transfer remains fully conservative as long as the inflated accretor fits within its Roche lobe, leading stars to behave like hamsters, stuffing excess material behind their expanding cheeks. We suggest a physically motivated prescription for the mass growth of such "hamstars," which can be used to determine mass-transfer efficiency in rapid binary population synthesis models. With this prescription, we estimate that progenitors of high-mass X-ray binaries and gravitational-wave sources may have experienced highly nonconservative mass transfer. In contrast, for low-mass accretors, the accretion timescale can exceed the thermal timescale by a larger factor without causing significant radial expansion.

Authors: Mike Lau, Ryosuke Hirai, Ilya Mandel, Christopher A. Tout

Date Published: 24th Apr 2024

Publication Type: Journal

Statistical methods for probabilistic forecasts of real-valued outcomes

Abstract

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Author: Eva-Maria Walz

Date Published: 19th Apr 2024

Publication Type: Doctoral Thesis

Attention or convolution: Transformer encoders in audio language models for inference efficiency

Abstract

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Authors: Sungho Jeon, Ching-Feng Yeh, Hakan Inan, Wei-Ning Hsu, Rashi Rungta, Yashar Mehdad, Daniel Bikel

Date Published: 14th Apr 2024

Publication Type: InProceedings

A magnetic massive star has experienced a stellar merger

Abstract

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Authors: A. J. Frost, H. Sana, L. Mahy, G. Wade, J. Barron, J. -B. Le Bouquin, A. Mérand, F. R. N. Schneider, T. Shenar, R. H. Barbá, D. M. Bowman, M. Fabry, A. Farhang, P. Marchant, N. I. Morrell, J. V. Smoker

Date Published: 12th Apr 2024

Publication Type: Journal

AdaptiveCpp Stdpar: C++ Standard Parallelism Integrated Into a SYCL Compiler

Abstract

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Authors: Aksel Alpay, Vincent Heuveline

Date Published: 8th Apr 2024

Publication Type: Journal

SYCL-Bench 2020: Benchmarking SYCL 2020 on AMD, Intel, and NVIDIA GPUs

Abstract

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Authors: Luigi Crisci, Lorenzo Carpentieri, Peter Thoman, Aksel Alpay, Vincent Heuveline, Biagio Cosenza

Date Published: 8th Apr 2024

Publication Type: Journal

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