Results 11 to 20 of about 2,398 (265)

Unveiling Properties of the Nonthermal X-Ray Production in the Gamma-Ray Binary LS 5039 Using the Long-term Pattern of Its Fast X-Ray Variability

open access: yesThe Astrophysical Journal, 2023
Gamma-ray binary systems, a subclass of high-mass X-ray binaries, show nonthermal emissions from radio to TeV. While efficient electron acceleration is considered to take place in them, the nature of the acceleration mechanism and the physical ...
Hiroki Yoneda   +7 more
doaj   +1 more source

Multiwavelength Characterization of the High-mass X-Ray Binary Population of M33

open access: yesThe Astrophysical Journal, 2023
We present multiwavelength characterization of 65 high-mass X-ray binary (HMXB) candidates in M33. We use the Chandra ACIS survey of M33 (ChASeM33) catalog to select hard X-ray point sources that are spatially coincident with UV-bright point-source ...
Margaret Lazzarini   +14 more
doaj   +1 more source

Masses of Neutron Stars in X-ray Binary Systems [PDF]

open access: yesSymposium - International Astronomical Union, 1981
The masses of 6 neutron stars have now been established through studies of binary X-ray and radio pulsars. All of the masses are found to be consistent with, but not necessarily constrained to, the range 1.2–1.6 M⊙. In this talk we discuss the methods and assumptions used in determining the masses of neutron stars in binary X-ray pulsar systems.
R. L. Kelley, S. Rappaport
openaire   +1 more source

Radio Emitting X-ray Binary Stars [PDF]

open access: yesInternational Astronomical Union Colloquium, 1996
Some of the most astrophysically interesting objects are found among the radio-emitting X-ray binary stars (REXRB). The class includes the well-studied objects such as SS 433, Cyg X-3 and Sco X-1. The recent discoveries of relativistic ejection of radio knots in the X-ray transients 1915+105 (Mirabel & Rodriguez 1994) and 1655–40 (Hjellming & ...
openaire   +1 more source

The origin of the hard X-ray tail in neutron-star X-ray binaries [PDF]

open access: yesAstronomy & Astrophysics, 2016
Neutron star X-ray binaries emit a compact, optically thick, relativistic radio jet during low-luminosity, usually hard states, as Galactic black-hole X-ray binaries do. When radio emission is bright, a hard power-law tail without evidence for an exponential cutoff is observed in most systems.
Reig, P., Kylafis, N.
openaire   +2 more sources

Back to Business: SLX 1746–331 after 13 Years of Silence

open access: yesThe Astrophysical Journal, 2023
The black hole candidate system SLX 1746–331 was back to business in 2023, after a long silence of roughly 13 years. An outburst was observed thoroughly by Insight-HXMT and NICER.
Jing-Qiang Peng   +19 more
doaj   +1 more source

An X-Ray-dim “Isolated” Neutron Star in a Binary?

open access: yesThe Astrophysical Journal Letters, 2023
Abstract We report the discovery of a dark companion to 2MASS J15274848+3536572 with an orbital period of 6.14 hr. Combining the radial velocity from LAMOST observations and modeling of the multiband light curve, one obtains a mass function of ≃0.131 M ⊙, an inclination of
Jie Lin   +15 more
openaire   +3 more sources

Accretion Onto the Neutron Star in Be/X-ray Binaries [PDF]

open access: yesSymposium - International Astronomical Union, 2004
We study accretion onto the neutron star in Be/X-ray binaries, using a 3D SPH code and the data imported from a high resolution simulation by Okazaki et al. (2002) for a coplanar system with a short period (Porb = 24.3 d) and moderate eccentricity (e = 0.34).
Hayasaki, Kimitake, Okazaki, Atsuo. T.
openaire   +2 more sources

Magnetic Fields of Neutron Stars in X-Ray Binaries [PDF]

open access: yesSpace Science Reviews, 2014
16 pages, 9 figures, invited topical review, to be published in The Strongest Magnetic Fields in the Universe (Space Sciences Series of ISSI, Springer), Space Science Reviews ...
Revnivtsev, Mikhail, MEREGHETTI, Sandro
openaire   +3 more sources

X-Raying the Birth of Binary Neutron Stars and Neutron Star–Black Hole Binaries

open access: yesThe Astrophysical Journal, 2022
Abstract We consider fallback accretion after an ultrastripped supernova (USSN) that accompanies formation of a binary neutron star (BNS) or a neutron star–black hole binary (NS–BH). The fallback matter initially accretes directly to the nascent NS, while it starts to accrete to the circumbinary disk, typically 0.1–1 day after the onset ...
Kazumi Kashiyama, Ryo Sawada, Yudai Suwa
openaire   +2 more sources

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