Results 31 to 40 of about 131,686 (354)

Bowen Fluorescence from Companion Stars in X-Ray Binaries [PDF]

open access: bronzeInternational Astronomical Union Colloquium, 2004
AbstractThis paper will review a new technique of detecting companion stars in LMXBs and X-ray transients in outburst using the Bowen fluorescence NIII lines at 4634-4640. These lines are very efficiently reprocessed in the atmospheres of the companion stars and, thereby, provide estimates of the K2 velocities and mass functions.
J. Casares   +5 more
openalex   +5 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

X-rays from Hot Subdwarfs [PDF]

open access: yes, 2015
Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs.
La Palombara, Nicola, Mereghetti, Sandro
core   +3 more sources

Analysis of the Quiescent Low-Mass X-Ray Binary Population in Galactic Globular Clusters [PDF]

open access: yes, 2003
Quiescent low-mass X-ray binaries (qLMXBs) containing neutron stars have been identified in several globular clusters using Chandra or XMM X-ray observations, via their distinctive soft thermal spectra. We report a complete census of the qLMXB population
C. Heinke   +6 more
semanticscholar   +1 more source

EVIDENCE FOR A CONSTANT INITIAL MASS FUNCTION IN EARLY-TYPE GALAXIES BASED ON THEIR X-RAY BINARY POPULATIONS, [PDF]

open access: yes, 2014
A number of recent studies have proposed that the stellar initial mass function (IMF) of early type galaxies varies systematically as a function of galaxy mass, with higher mass galaxies having bottom-heavy IMFs.
M. Peacock   +6 more
semanticscholar   +1 more source

The Low-Mass X-Ray Binary-Globular Cluster Connection in NGC 4472 [PDF]

open access: yes, 2002
We have analyzed the low-mass X-ray binary (LMXB) candidates in a Chandra observation of the giant elliptical galaxy NGC 4472. In a region observed by the Hubble Space Telescope (HST), approximately 40% of the bright (LX ≳ 1037 ergs s-1) LMXBs are ...
A. Kundu, T. Maccarone, S. Zepf
semanticscholar   +1 more source

On the neutron star-disc interaction in Be/X-ray binaries [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2007
accepted for publication in ...
Pablo Reig, Pablo Reig
openaire   +4 more sources

Discovery of Twin kHz QPOs in the Peculiar X-Ray Binary Circinus X-1 [PDF]

open access: yes, 2006
We report the discovery with the RXTE PCA of twin kHz QPOs in the peculiar X-ray binary Circinus X-1. Eleven cases of simultaneous double QPOs occurred, with significances of up to 6.3 and 5.5 σ and centroid frequencies ranging between approximately 56 ...
S. Boutloukos   +6 more
semanticscholar   +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.
S. Rappaport, R. L. Kelley
openaire   +2 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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