Results 31 to 40 of about 142,213 (355)

Clumpy Wind Studies and the Nondetection of a Cyclotron Line in OAO 1657–415

open access: yesThe Astrophysical Journal, 2023
Winds of massive stars are suspected to be inhomogeneous (or clumpy), which biases the measures of their mass-loss rates. In high-mass X-ray binaries (HMXBs), the compact object can be used as an orbiting X-ray point source to probe the wind and ...
Pragati Pradhan   +13 more
doaj   +1 more source

Do High-spin High-mass X-Ray Binaries Contribute to the Population of Merging Binary Black Holes? [PDF]

open access: yesAstrophysical Journal Letters, 2022
Gravitational-wave observations of binary black hole (BBH) systems point to black hole spin magnitudes being relatively low. These measurements appear in tension with high spin measurements for high-mass X-ray binaries (HMXBs).
Monica Gallegos-Garcia   +4 more
semanticscholar   +1 more source

High-Mass X-ray binary: Classification, Formation, and Evolution

open access: yesJournal of Physics: Conference Series, 2021
A high mass X-ray binary is a binary system consisting of an accreting neutron star or black hole and an early-type star with more than 10 solar masses.
Chengzhuo Tan
semanticscholar   +1 more source

High Mass X-ray Binaries: The Donor Stars and their Compact Companions [PDF]

open access: green, 2008
This thesis presents new spectroscopic observations of the donor star in several High Mass X-ray Binary systems. The various types of X-ray Binary systems that exist are outlined and the methods and limitations of mass determination of the stellar components are discussed. The masses of the compact objects are determined for the systems SMC X-1 and LMC
Amira Val Baker
openalex   +2 more sources

MAD-Accretion Scenario in High-Mass X-Ray Binaries with Neutron Stars [PDF]

open access: greenAstrophysical Bulletin
The wind-fed accretion of gas with an intrinsic magnetic field onto neutron stars in high-mass X-ray binaries (HMXBs) is discussed. The criteria for the implementation of quasi-spherical accretion in the system, the formation of a Keplerian accretion disk and a non-Keplerian magnetically arrested disk (MAD-accretion scenario) are formulated.
N. R. Ikhsanov   +2 more
openalex   +3 more sources

Characteristics and evolution of Be-type high mass X-ray binaries as potential Ultraluminous X-ray Sources [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2022
Some ultraluminous X-ray sources (ULXs) exhibit X-ray pulses, and their central sources are thought to be neutron stars. It has also been suggested that some are transient sources with Be-type donors. In this study, we use the mass accretion model of a
S. Karino
semanticscholar   +1 more source

Evolution of eccentric high-mass X-ray binaries. The case of GX 301-2 [PDF]

open access: yesAstronomy & Astrophysics, 2022
The formation of neutron stars is associated with powerful astrophysical transients such as supernovae. In many cases, asymmetries in the supernova explosions are thought to be responsible for the large observed velocities of neutron stars.
A. Bunzel   +3 more
semanticscholar   +1 more source

Constraining the properties of dense neutron star cores: The case of the low-mass X-ray binary HETE J1900.1–2455 [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2021
Measuring the time evolution of the effective surface temperature of neutron stars can provide invaluable information on the properties of their dense cores.
N. Degenaar   +5 more
semanticscholar   +1 more source

Calibrating X-Ray Binary Luminosity Functions via Optical Reconnaissance. II. The High-mass XLF and Globular Cluster Population of X-Ray Binaries in the Low Star-forming Spiral M81 [PDF]

open access: yesAstrophysical Journal, 2022
We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multiband Hubble Space Telescope (HST) imaging data.
Q. Hunt   +4 more
semanticscholar   +1 more source

Physical parameters of the high-mass X-ray binary 4U1700-37 [PDF]

open access: yes, 2002
We present the results of a detailed non-LTE analysis of the ultraviolet and optical spectrum of the O6.5 Iaf + star HD 153919 - the mass donor in the high-mass X-ray binary 4U1700-37.
J. S. Clark   +11 more
semanticscholar   +1 more source

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