Results 61 to 70 of about 195 (150)
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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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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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
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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The Astrophysical JournalWe searched the Chandra and XMM archives for 900 Green Pea galaxies to identify signs of active galactic nuclei (AGN). Green peas are low-mass, emission-line galaxies that resemble high-redshift dwarf galaxies. From 29 observations, we detected X-rays in
Mainak Singha +10 more
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Ultraluminous X‐ray sources: Three exciting years [PDF]
Astronomische Nachrichten, 2016 AbstractThe extreme extragalactic sources known as Ultraluminous X‐ray Sources (ULX) represent a unique testing environment for compact objects population studies and the accretion process. Their nature has long been disputed. Their luminosity, well above the Eddington luminosity for a stellar‐mass black hole, can imply the presence of an intermediate ...
openaire +2 more sources
Discovery of a Candidate 2 keV Cyclotron Resonance Scattering Feature in the HLX NGC 3583 X-1
The Astrophysical JournalWe present a broadband X-ray study of the transient hyperluminous X-ray source (HLX), 2SXPS J111416.1+481833, in the galaxy NGC 3583, using archival XMM-Newton, NuSTAR, and Chandra data, and long-term Swift X-ray Telescope monitoring.
Kiran M. Jayasurya +2 more
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Monitoring of the Spectral and Timing Properties of the Ultraluminous X-Ray Pulsar NGC 7793 P13
The Astrophysical Journal LettersWe present the long-term spectral and timing evolution of the ultraluminous X-ray pulsar NGC 7793 P13 from 2011 to 2024 based on archival data from XMM-Newton, Chandra, NICER, and NuSTAR, including unpublished data after 2020. This data set enables us to
Marina Yoshimoto +5 more
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Ultraluminous X-ray Sources in M51
, 2002 4 pages, to appear in the Proceedings of the Symposium on ``New Visions of the Universe in the XMM-Newton and Chandra Era'', 26-30 November 2001, ESTEC, The ...
Terashima, Yuichi, Wilson, Andrew S.
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