Results 21 to 30 of about 2,742,038 (335)

Detailed models of interacting short-period massive binary stars [PDF]

Astronomy & Astrophysics, 2021
Context. The majority of massive stars are part of binary systems. In about a quarter of these, the companions are so close that mass transfer occurs while they undergo core hydrogen burning, first on the thermal and then on the nuclear timescale.
K. Sen, N. Langer, P. Marchant, A. Menon, S. D. de Mink, A. Schootemeijer, C. Schürmann, L. Mahy, B. Hastings, K. Nathaniel, H. Sana, C. Wang, X.-T. Xu   +12 more
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The spins of compact objects born from helium stars in binary systems [PDF]

, 2022
The angular momentum (AM) content of massive stellar cores helps to determine the natal spin rates of neutron stars and black holes. Asteroseismic measurements of low-mass stars have proven that stellar cores rotate slower than predicted by most prior ...
J. Fuller, Wenbin Lu
semanticscholar   +1 more source

Quantitative Spectroscopy of Close Binary Stars [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractThe method of spectral disentangling has now created the opportunity for studying the chemical composition in previously inaccessible components of binary and multiple stars. This in turn makes it possible to trace their chemical evolution, a vital aspect in understanding the evolution of stellar systems. We review different ways to reconstruct
Pavlovski, Krešimir, Southworth, John
openaire   +3 more sources

The Close Binary Fraction of Solar-type Stars Is Strongly Anticorrelated with Metallicity [PDF]

Astrophysical Journal, 2018
There is now strong evidence that the close binary fraction (P < 104 days; a < 10 au) of solar-type stars (M1 ≈ 0.6–1.5 ) decreases significantly with metallicity. Although early surveys showed that the observed spectroscopic binary (SB) fractions in the
M. Moe, K. Kratter, C. Badenes
semanticscholar   +1 more source

Detecting New Visual Binaries in Gaia DR3 with Gaia and Two Micron All Sky Survey (2MASS) Photometry. I. New Candidate Binaries within 200 pc of the Sun

The Astronomical Journal, 2023
We present a method to identify likely visual binaries in Gaia eDR3 that does not rely on parallax or proper motion. This method utilizes the various point-spread function sizes of Two Micron All Sky Survey (2MASS)/Gaia, where at
Ilija Medan, Sébastien Lépine
doaj   +1 more source

The evolution of massive binary systems [PDF]

Serbian Astronomical Journal, 2020
The evolution of massive stars in close binary systems is significantly different from single star evolution due to a series of interactions between the two stellar components.
Petrović Jelena
doaj   +1 more source

The Eclipses of the Close Binary Star BE UMa [PDF]

International Astronomical Union Colloquium, 1996
BE UMa is a close binary star, not transferring mass, with an extremely hot primary star irradiating the inner face of the cool secondary star. The light curve shows a large-amplitude, sinusoidal variation with a period of 2.29 d, and an eclipse that is centered on the minimum of the variation [1], [3].
Janet H. Wood, E. L. Robinson, E.-H. Zhang   +2 more
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The Search for Close Binary Evolved Stars [PDF]

International Astronomical Union Colloquium, 1989
AbstractWe report on a search for short-period binary systems composed of pairs of evolved stars. The search is being carried out concurrently with a program to characterize the kinematical properties of two different samples of stars. Each sample has produced one close binary candidate for which further spectroscopic observations are planned.
Rex A. Saffer, James Liebert
openaire   +1 more source

From dinuclear systems to close binary stars: Application to source of energy in the universe [PDF]

International Journal of Modern Physics E, 2018
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.
V. Sargsyan, H. Lenske, G. Adamian, N. Antonenko   +3 more
semanticscholar   +1 more source

A high fraction of close massive binary stars at low metallicity [PDF]

Nature Astronomy
At high metallicity, a majority of massive stars have at least one close stellar companion. The evolution of such binaries is subject to strong interaction processes, which heavily impact the characteristics of their life-ending supernova and compact ...
H. Sana, T. Shenar, J. Bodensteiner, N. Britavskiy, N. Langer, D. Lennon, L. Mahy, I. Mandel, S. D. de Mink, L. Patrick, J. Villaseñor, M. Dirickx, M. Abdul-Masih, L. A. Almeida, F. Backs, S. R. Berlanas, M. Bernini-Peron, D. Bowman, V. A. Bronner, P. Crowther, K. Deshmukh, C. Evans, M. Fabry, M. Gieles, A. Gilkis, G. González-Torà, G. Gräfener, Y. Götberg, C. Hawcroft, V. Hénault-Brunet, A. Herrero, G. Holgado, R. Izzard, A. de Koter, S. Janssens, C. Johnston, J. Josiek, S. Justham, V. Kalari, J. Klencki, J. Kubát, B. Kubátová, R. Lefever, J. V. van Loon, B. Ludwig, J. Mackey, J. M. Apellániz, G. Maravelias, P. Marchant, T. Mazeh, A. Menon, M. Moe, F. Najarro, L. Oskinova, R. Ovadia, D. Pauli, M. Pawlak, V. Ramachandran, M. Renzo, D. F. Rocha, A. Sander, F. Schneider, A. Schootemeijer, E. C. Schösser, C. Schürmann, K. Sen, S. Shahaf, S. Simón-Díaz, L. V. van Son, M. Stoop, S. Toonen, F. Tramper, R. Valli, A. Vigna-Gómez, J. Vink, C. Wang, R. Willcox   +76 more
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