Results 11 to 20 of about 9,171,233 (161)
The Hunt for Pulsating Ultraluminous X-ray Sources [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 Abstract Motivated by the recent discoveries that six Ultraluminous X-ray Sources (ULXs) are powered by highly super-Eddington X-ray pulsars, we searched for additional pulsating ULX (PULX) candidates by identifying sources that exhibit long-term flux variability of at least an order of magnitude (a common feature seen in the 6 known ...
X Song +6 more
core +13 more sources
Ultraluminous X-Ray Sources [PDF]
Astrophysical Bulletin, 2021 32 pages, 21 figures, 1 ...
Fabrika S.N. +3 more
openaire +3 more sources
Synchrotron Cutoff in Ultraluminous X-Ray Sources
The Astrophysical Journal, 2023 The origin of spectral curvature at energies E ≃ 10 keV in ultraluminous X-ray sources (ULXs) is not well understood. In this paper, we propose a novel mechanism based on synchrotron radiation to explain this cutoff.
Tanuman Ghosh, Shiv Sethi, Vikram Rana
doaj +3 more sources
X-ray observations of ultraluminous X-ray sources [PDF]
Astrophysics and Space Science, 2007 Invited talk at the 5th Stromlo Symposium. 10 pages, 4 figures.
Roberts, T.P.
openaire +6 more sources
The high energy X-ray probe (HEX-P): studying extreme accretion with ultraluminous X-ray sources
Frontiers in Astronomy and Space Sciences, 2023 Introduction: Ultraluminous X-ray sources (ULXs) represent an extreme class of accreting compact objects: from the identification of some of the accretors as neutron stars to the detection of powerful winds travelling at 0.1–0.2 c, the increasing ...
Matteo Bachetti +28 more
doaj +3 more sources
Winds in ultraluminous X‐ray sources: New challenges
Astronomische Nachrichten, Volume 344, Issue 4, May 2023., 2023 Abstract Ultraluminous X‐ray sources (ULXs) are extreme X‐ray binaries shining above 1039 erg/s, in most cases as a consequence of super‐Eddington accretion onto neutron stars and stellar‐mass black holes accreting above their Eddington limit. This was understood after the discovery of coherent pulsations, cyclotron lines, and powerful winds.
C. Pinto, P. Kosec
wiley +3 more sources
Ultrafast outflows in ultraluminous X‐ray sources [PDF]
Astronomische Nachrichten, 2017 Ultraluminous X‐ray sources (ULXs) are bright extragalactic sources with X‐ray luminosities above 1039 erg s−1 powered by accretion onto compact objects. According to the first studies performed with XMM‐Newton, ULXs seemed to be excellent candidates to host intermediate‐mass black holes (102 − 4M⊙).
Pinto, C. +3 more
core +8 more sources
Ultraluminous X-ray Sources and Their Nebulae [PDF]
AIP Conference Proceedings, 2008 One of the interesting features of Ultraluminous X-ray sources is that many of them are surrounded by luminous nebulae exhibiting diverse observational properties. In different cases the nebulae are photoionized or shock-powered. Generally, the two energy sources appear to coexist.
Pavel Abolmasov, Magnus Axelsson
openaire +3 more sources
Ultraluminous X-ray sources [PDF]
, 2013 Ultraluminous X-ray sources (ULXs) are accreting black holes with X-ray luminosities in excess of the Eddington limit for a typical ~10 solar mass Galactic black hole.
SUTTON, ANDREW
core +6 more sources
Wind-powered Ultraluminous X-ray Sources [PDF]
The Astrophysical Journal, 2021 Abstract Although ultraluminous X-ray sources (ULX) are important for astrophysics because of their extreme apparent super-Eddington luminosities, their nature is still poorly known. Theoretical and observational studies suggest that ULXs could be a diversified group of objects that are composed of low-mass X-ray binaries, high-mass X ...
Grzegorz Wiktorowicz +5 more
openaire +4 more sources