Results 111 to 120 of about 5,289 (173)
Electromagnetic counterparts to massive black-hole mergers. [PDF]
Living Rev Relativ, 2022 Bogdanović T, Miller MC, Blecha L.
europepmc +1 more source
Modeling Reflection Spectra of Super-Eddington X-Ray Sources
The Astrophysical JournalRelativistic reflection is a common feature in the X-ray observations of accreting compact objects. We present reflux , a new X-ray reflection model for spectral analysis of super-Eddington sources.
Swarnim Shashank +7 more
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Multiwavelength Study of a Hyperluminous X-Ray Source near NGC 6099: A Strong IMBH Candidate
The Astrophysical JournalWe report on the intriguing properties of a variable X-ray source projected at the outskirts of the elliptical galaxy NGC 6099 ( d ≈ 139 Mpc). If truly located near NGC 6099, this is a hyperluminous X-ray source that reached an X-ray luminosity L _X ...
Yi-Chi Chang +5 more
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Pulsed Iron Line Emission from the First Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124
The Astrophysical JournalWe report the phase-resolved spectral results of the first Galactic pulsating ultraluminous X-ray source (PULX) Swift J0243.6+6124, modeling its 2017–2018 outburst peak using data collected by the Hard X-ray Modulation Telescope (Insight-HXMT). The broad
Y. X. Xiao +16 more
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Galactic Superaccreting X-Ray Binaries as Super-PeVatron Accelerators
The Astrophysical Journal LettersThe extension of the cosmic-ray (CR) spectrum well beyond 1 PeV necessitates the existence of a population of accelerators in the Milky Way, which we refer to as super-PeVatrons. Identifying the nature of these sources remains a challenge to the paradigm
Jieshuang Wang +2 more
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Radio Detections of Ultraluminous X-ray Sources
, 2004 4 pages with three figures, conference proceedings for X-ray and Radio ...
Miller, Neal A. +2 more
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Long-term Study of the First Galactic Ultraluminous X-Ray Source Swift J0243.6+6124 Using NICER
The Astrophysical JournalWe present the results obtained from detailed X-ray timing and spectral studies of X-ray pulsar Swift J0243.6+6124 during its giant and normal X-ray outbursts between 2017 and 2023 observed by the Neutron star Interior Composition Explorer (NICER).
Birendra Chhotaray +6 more
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The Astrophysical JournalRadiation exerts pressure, and therefore it is possible for an intensely bright object to balance the gravitational force near a massive compact object. General relativity demonstrates that this balance occurs for super-Eddington luminosities at a finite
Noah Monk, Adam Rogers
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X-Ray Bright Active Galactic Nuclei in Local Dwarf Galaxies: Insights from eROSITA
The Astrophysical JournalAlthough supermassive black holes (SMBHs) reside in the heart of virtually every massive galaxy, it remains debated whether dwarf galaxies commonly host SMBHs. Because low-mass galaxies may retain memory of the assembly history of their black holes (BHs),
Andrea Sacchi +3 more
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Ultraluminous X-ray sources in Globular Clusters
Astronomy & AstrophysicsThis paper investigates the formation, populations, and evolutionary paths of ultraluminous X-ray sources (ULXs) within globular clusters (GCs). ULXs, characterised by their extreme X-ray luminosities, present a challenge to our understanding of accretion physics and compact object formation.
Grzegorz Wiktorowicz +4 more
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