Results 71 to 80 of about 9,171,233 (161)
Flux Variations and Torque Reversals of Cen X-3
The Astrophysical JournalCen X-3 is an archetypical X-ray pulsar with strong flux variations and alternating torque reversals, both of which are similar to those of recently discovered pulsating ultraluminous X-ray sources.
Jiren Liu
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Radio Counterparts of Ultraluminous X-Ray Sources in Nearby Galaxies
The Astrophysical JournalRadio surveys of ultraluminous X-ray sources (ULXs) allow us to find supercritically accreting compact objects (SS 433/W50-like systems) or stripped nuclear black holes in nearby galaxies. We identified 21 such objects by crossmatching a ULX catalog with
Yijia Zhang +3 more
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ULTRALUMINOUS X-RAY SOURCES IN ARP 147 [PDF]
, 2010 The Chandra X-Ray Observatory was used to image the collisional ring galaxy Arp 147 for 42 ks. We detect nine X-ray sources with luminosities in the range of (1.4-7) × 10[superscript 39] erg s[superscript –1] (assuming that the sources emit isotropically)
Rappaport, Saul A +7 more
core +1 more source
How Beaming Shapes the Demographics of Ultraluminous X-Ray Sources
The Astrophysical JournalUltraluminous X-ray sources (ULXs) are off-nuclear compact objects with apparent luminosities above 10 ^39 erg s ^−1 , often exceeding the Eddington limit for stellar-mass black holes.
Ying-Han Mao, Xiang-Dong Li
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X-Ray Views of Galactic Accreting Pulsars in High-Mass X-Ray Binaries
UniverseAccreting X-ray pulsars, located in X-ray binaries, are neutron stars with magnetic fields as strong as B∼1012–13 G. This review offers a concise overview of the accretion and radiation processes of X-ray pulsars and summarizes their rich observational ...
Shan-Shan Weng, Long Ji
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The Long-term Spin-down Trend of Ultraluminous X-Ray Pulsar M82 X-2
The Astrophysical JournalThe discovery in 2014 of the pulsation from the ultraluminous X-ray source (ULX) M82 X-2 has changed our view of ULXs. Because of the relatively short baseline over which pulsations have been detected so far, M82 X-2's spin state had been assumed to be ...
Jiren Liu
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Near-infrared counterparts of ultraluminous X-ray sources [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 In this paper we present the results of the first systematic search for counterparts to nearby ultraluminous X-ray sources (ULXs) in the near-infrared (NIR). We observed 62 ULXs in 37 galaxies within 10 Mpc and discovered 17 candidate NIR counterparts.
Heida, M. +10 more
openaire +6 more sources
Phase-dependent Spectral Shape Changes in the Ultraluminous X-Ray Pulsar NGC 5907 ULX1
The Astrophysical JournalThe discovery of coherent pulsations from several ultraluminous X-ray pulsars (ULXPs) has provided direct evidence of a supercritical accretion flow.
Daiki Miura +2 more
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Return to the Forgotten Ultraluminous X-Ray Source: A Broadband NICER+NuSTAR Study of NGC 4190 ULX-1
The Astrophysical JournalWe observed the nearby and relatively understudied ultraluminous X-ray source (ULX) NGC 4190 ULX-1 jointly with Neutron Star Interior Composition Explorer (NICER) and NuSTAR to investigate its broadband spectrum, timing properties, and spectral variation
Hannah P. Earnshaw +9 more
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High-energy Neutrinos from Gamma-Ray-faint Accretion-powered Hypernebulae
The Astrophysical Journal, 2023 Hypernebulae are inflated by accretion-powered winds accompanying hyper-Eddington mass transfer from an evolved post-main-sequence star onto a black hole or neutron star companion.
Navin Sridhar, Brian D. Metzger, Ke Fang
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