Results 91 to 100 of about 9,171,233 (161)

Optical Counterparts of Ultraluminous X-Ray Sources

, 2002
8 pages, 8 figures, to appear in the proceedings of the symposium 'New Visions of the X-ray Universe in the XMM-Newton and Chandra Era', 26-30 November 2001, ESTEC, The NetherlandsDespite much observational and theoretical effort little is presently ...
Pakull, Manfred W., Mirioni, Laurent
core   +3 more sources

On the physical nature of the source of ultraluminous X-ray pulsations [PDF]

Astrophysics and Space Science, 2015
Extended and revised version, which will appear in Astrophysics and Space Science (ASTR-D-15-00411R2-accepted).
openaire   +2 more sources

Progress on laser-driven X-ray sources at ELI Beamlines

, 2019
Three main paths are being developed within the ELI research program for transforming driving laser pulses into bursts of bright short wavelength radiation: high-order harmonic generation in gases, plasma X-ray sources and sources based on relativistic ...
Hort O., Albrecht M., Mai D.-D., Jurkovič M., Nejdl J., Chaulagain U., Finke O.   +6 more
core   +1 more source

Ultraluminous X-ray Sources in Nearby Galaxies

, 2020
. The observation of nearby galaxies with Einstein, ROSAT, ASCA, XMMNewton and Chandra has revealed a novel class of point-like, off-nuclear X-ray sources with isotropic luminosity largely in excess of the Eddington limit for one solar mass.
L Zampieri
core  

Electromagnetic counterparts to massive black-hole mergers. [PDF]

Living Rev Relativ, 2022
Bogdanović T, Miller MC, Blecha L.
europepmc   +1 more source

An Alternative Model for the Orbital Decay of M82 X-2: The Anomalous Magnetic Braking of a Bp Star

The Astrophysical Journal
Recently, the first pulsating ultraluminous X-ray source M82 X-2 was reported to be experiencing a rapid orbital decay at a rate of $\dot{P}=-(5.69\pm 0.24)\times {10}^{-8}\,{\rm{s}}\,{{\rm{s}}}^{-1}$ based on 7 yr NuSTAR data.
Wen-Cong Chen
doaj   +1 more source

A Deeper Look into eFEDS AGN Candidates in Dwarf Galaxies with Chandra

The Astrophysical Journal
The ability to accurately discern active massive black holes (BHs) in nearby dwarf galaxies is paramount to understanding the origins and processes of “seed” BHs in the early Universe.
Adonis A. Sanchez, Amy E. Reines, Ákos Bogdán, Ralph P. Kraft   +3 more
doaj   +1 more source

Search for Fast Radio Bursts and Radio Pulsars from Pulsing Ultraluminous X-Ray Sources

The Astrophysical Journal
We conducted targeted fast radio burst (FRB) and pulsar searches on eight pulsing ultraluminous X-ray sources (PULXs) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) and the Parkes 64 m Radio Telescope (Murriyang) to investigate ...
Juntao Bai, Na Wang, Rui Luo, Wei-Yang Wang, Shi Dai, Songbo Zhang, Shiqian Zhao, Shuangqiang Wang   +7 more
doaj   +1 more source

Modeling Reflection Spectra of Super-Eddington X-Ray Sources

The Astrophysical Journal
Relativistic 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, Askar B. Abdikamalov, Honghui Liu, Temurbek Mirzaev, Jiachen Jiang, Cosimo Bambi, Fergus Baker, Andrew Young   +7 more
doaj   +1 more source

Multiwavelength Study of a Hyperluminous X-Ray Source near NGC 6099: A Strong IMBH Candidate

The Astrophysical Journal
We 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, Roberto Soria, Albert K. H. Kong, Alister W. Graham, Kirill A. Grishin, Igor V. Chilingarian   +5 more
doaj   +1 more source