Results 61 to 70 of about 497,978 (250)
Bimodality of Wind-fed Accretion in High Mass X-ray Binaries [PDF]
, 2014 We study an influence of X-ray photo-ionization from an accreting neutron star in a high mass X-ray binary. Our aim is to unveil a new principle governing X-ray luminosities of X-ray binaries, with a simple analysis of fluid equations simulating line-driven wind flow under influence of X-ray irradiation.
arxiv +1 more source
Long-term optical variability of high-mass X-ray binaries. II. Spectroscopy [PDF]
A&A 590, A122 (2016), 2016 We present the results of our monitoring program to study the long-term variability of the Halpha line in high-mass X-ray binaries. We have carried out the most complete optical spectroscopic study of the global properties of high-mass X-ray binaries so far with the analysis of more than 1100 spectra of 20 sources.
arxiv +1 more source
GIANT OUTBURSTS IN Be/X-RAY BINARIES [PDF]
The Astrophysical Journal, 2014 Accepted for publication in ApJ ...
Rebecca G. Martin +4 more
openaire +4 more sources
Astroparticles from X-Ray Binary Coronae
The Astrophysical Journal LettersThe recent observation of high-energy neutrinos from the Galactic plane implies an abundant population of hadronic cosmic-ray sources in the Milky Way.
K. Fang +3 more
doaj +1 more source
Insight-HXMT Views Her X-1: Probing the Dependence of the Cyclotron Line Energy on Flux and Time
The Astrophysical Journal, 2023 Recent observations of Her X-1 with NuSTAR (as well as with INTEGRAL, Swift, and Astrosat) have provided evidence that the nearly 20 yr-long decay of the cyclotron line energy since ∼1994 has ended and that a stable value has replaced the decay.
G. C. Xiao +13 more
doaj +1 more source
X-Ray Binaries in External Galaxies
, 2023 X-ray appearance of normal galaxies is mainly determined by X-ray binaries powered by accretion onto a neutron star or a stellar mass black hole. Their populations scale with the star-formation rate and stellar mass of the host galaxy and their X-ray luminosity distributions show a significant split between star-forming and passive galaxies, both facts
Gilfanov, Marat +3 more
openaire +2 more sources
Decomposing the Spectrum of Ultraluminous X-Ray Pulsar NGC 300 ULX-1
The Astrophysical Journal, 2023 A phase-resolved analysis on the X-ray spectrum of ultraluminous X-ray pulsar (ULXP) NGC 300 ULX-1 is performed with data taken with XMM-Newton and NuSTAR on 2016 December 16. In addition to the classical phase-restricting analysis, a method developed in
Shogo B. Kobayashi +5 more
doaj +1 more source
Power Spectra of X‐Ray Binaries [PDF]
The Astrophysical Journal, 2002 The interpretation of Fourier spectra in the time domain is critically examined. Power density spectra defined and calculated in the time domain are compared with Fourier spectra in the frequency domain for three different types of variability: periodic signals, Markov processes and random shots.
Yasushi Muraki +3 more
openaire +3 more sources
The Astrophysical JournalWe present the results obtained from timing and spectral studies of 15 thermonuclear X-ray bursts from 4U 1820–30 observed with the Neutron Star Interior Composition Explorer (NICER) during its 5 yr of observations between 2017 and 2022.
Gaurava K. Jaisawal +16 more
doaj +1 more source
Catalog of the Galactic Population of X-Ray Pulsars in High-mass X-Ray Binary Systems
The Astrophysical Journal Supplement Series, 2023 A catalog of the Galactic population of X-ray pulsars in high-mass X-ray binary (HMXB) systems is presented. It contains information about 82 confirmed sources: 18 persistent and 64 transient pulsars.
Vitaliy Kim +2 more
doaj +1 more source