Results 31 to 40 of about 1,437,548 (339)

The Birth of a Massive First-star Binary [PDF]

open access: yesAstrophysical Journal, 2020
We study the formation of massive Population III binary stars using a newly developed radiation hydrodynamics code with the adaptive mesh refinement and adaptive ray-tracing methods.
K. Sugimura   +4 more
semanticscholar   +1 more source

A Search for Exoplanets in Short-Period Binary Star Systems [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2012
This paper reports the progress of a search for exoplanets with S-type orbits in short-period binary star systems. The selected targets have stellar orbital periods of just a few days. These systems are eclipsing binaries so that exoplanet transits, if
Ronald Kaitchuck   +2 more
doaj   +1 more source

Binary Gravitational Perturbations and Their Influence on the Habitability of Circumstellar Planets

open access: yesFrontiers in Astronomy and Space Sciences, 2021
In order to assess the habitability of planets in binary star systems, not only astrophysical considerations regarding stellar and atmospheric conditions are needed, but orbital dynamics and the architecture of the system also play an important role. Due
Elke Pilat-Lohinger, Ákos Bazsó
doaj   +1 more source

Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A [PDF]

open access: yes, 2017
On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB 170817A was observed independently by the Fermi Gamma-ray Burst Monitor, and the Anticoincidence Shield for ...
B. Abbott   +499 more
semanticscholar   +1 more source

Neutron Star Mergers and the Quark Matter Equation of State [PDF]

open access: yesEPJ Web of Conferences, 2022
As neutron stars merge they can approach very high nuclear density. Here, we summarized recent results for the evolution and gravitational wave emission from binary-neutron star mergers using a a variety of nuclear equations of state with and without a ...
Mathews Grant J.   +3 more
doaj   +1 more source

Properties of the Binary Neutron Star Merger GW170817 [PDF]

open access: yes, 2018
On August 17, 2017, the Advanced LIGO and Advanced Virgo gravitational-wave detectors observed a low-mass compact binary inspiral. The initial sky localization of the source of the gravitational-wave signal, GW170817, allowed electromagnetic ...
The Ligo Scientific Collaboration   +499 more
semanticscholar   +1 more source

Binary black holes in young star clusters: the impact of metallicity [PDF]

open access: yes, 2020
Young star clusters are the most common birth-place of massive stars and are dynamically active environments. Here, we study the formation of black holes (BHs) and binary black holes (BBHs) in young star clusters, by means of 6000 N-body simulations ...
Ugo N Di Carlo   +11 more
semanticscholar   +1 more source

The distance variation due to mass transfer and mass loss in (13.6+8) Mand (13+10) M binary star systems

open access: yesIraqi Journal of Physics, 2019
In this research the change in the distance of the two stars in two binary star systems (13.6+8)M8and (13+10)M8 was studied, through the calculations the value  (rate of mass transfer) of the two phases of dynamical stages of mass which are mass loss ...
Mohammed R. Abdulameer
doaj   +1 more source

Binary star formation and the outflows from their discs [PDF]

open access: yes, 2017
We carry out magnetohydrodynamical simulations with FLASH of the formation of a single, a tight binary ($a\sim$2.5 AU) and a wide binary star ($a\sim$45 AU).
R. Kuruwita, C. Federrath, M. Ireland
semanticscholar   +1 more source

High-resolution optical and infrared spectroscopic observations of Cir X-1 [PDF]

open access: yes, 1999
We present new optical and infrared (IR) observations of Cir X-1 taken near apastron. Both sets of spectra show asymmetric emission lines. Archival optical observations show that an asymmetric Hα emission line has been in evidence for the past 20 years ...
Fender, R, Johnston, HM, Wu, K
core   +4 more sources

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