Results 1 to 10 of about 191,283 (348)
Unveiling Supergiant Fast X‐Ray Transient Sources withINTEGRAL [PDF]
The Astrophysical Journal, 2006 Supergiant high-mass X-ray binaries (SGXBs) are believed to be rare objects, as stars in the supergiant phase have a very short lifetime and to date only about a dozen of them have been discovered. They are known to be persistent and bright X-ray sources.
V. Sguera +11 more
semanticscholar +7 more sources
A New Sample of Transient Ultraluminous X-Ray Sources Serendipitously Discovered by Swift/XRT [PDF]
The Astrophysical Journal, 2023 Ultraluminous X-ray sources (ULXs) are our best laboratories for studying extreme super-Eddington accretion. Most studies of these objects are of relatively persistent sources; however, there is growing evidence to suggest a large fraction of these ...
Murray Brightman +13 more
doaj +4 more sources
Models of ultraluminous X-ray transient sources [PDF]
Astronomy & Astrophysics, 2020 Context. It is now widely accepted that most ultraluminous X-ray sources (ULXs) are binary systems whose large (above 1039 erg s−1) apparent luminosities are explained by super-Eddington accretion onto a stellar-mass compact object.
J. Hameury, J. Lasota
semanticscholar +4 more sources
A new transient ultraluminous X-ray source in NGC 7090 [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We report on the discovery of a new, transient ultraluminous X-ray source (ULX) in the galaxy NGC 7090. This new ULX, which we refer to as NGC 7090 ULX3, was discovered via monitoring with Swift during 2019–2020, and to date has exhibited a peak luminosity of LX ∼ 6 × 1039 erg s−1.
D. J. Walton +19 more
openalex +7 more sources
ON THE PROPERTIES OF THERMAL DISK WINDS IN X-RAY TRANSIENT SOURCES: A CASE STUDY OF GRO J1655–40 [PDF]
Astrophysical Journal, 2010 We present the results of hydrodynamical simulations of the disk photosphere irradiated by strong X-rays produced in the innermost part of the disk of an accreting black hole.
Stefan Luketic +4 more
openalex +3 more sources
Novae as a Class of Transient X-ray Sources [PDF]
The Astrophysical Journal, 2008 Motivated by the recently discovered class of faint (10^34-10^35 ergs/s) X-ray transients in the Galactic Center region, we investigate the 2-10 keV properties of classical and recurrent novae. Existing data are consistent with the idea that all classical novae are transient X-ray sources with durations of months to years and peak luminosities in the ...
Koji Mukai +6 more
openalex +5 more sources
Soft X-Ray Transients as Ultraluminous X-Ray Sources [PDF]
Publications of the Astronomical Society of Japan, 2004 Abstract We discuss the possibility that the soft X-ray transient GRS 1915$+$105 evolved from a binary similar to V4641 Sgr (XTE J1819$-$254) by conservative mass-transfer, and estimate the possible mass-transfer rates during the evolution.
Chang‐Hwan Lee, Gerald E. Brown
openalex +2 more sources
INTEGRAL observations of recurrent fast X-ray transient sources [PDF]
Astronomy & Astrophysics, 2005 Fast X-ray Transients (FXTs) are believed to be non-recurrent bright X-ray sources lasting less than a day and occuring at serendipitous positions, they can best be detected and discovered by instruments having a sufficiently wide field of view and high ...
V. Sguera +11 more
semanticscholar +4 more sources
Populations of Transient Galactic Bulge X-Ray Sources [PDF]
, 2001 Starting in 1999, the Rossi X-ray Timing Explorer (RXTE) has monitored the central bulge region of the Galaxy with the Proportional Counter Array (PCA), resolving about 50 binary X-ray sources, including 18 sources discovered by RXTE and BeppoSAX. The accretion rates that RXTE observed from these sources ranged from highs approaching Eddington limits ...
J. H. Swank, C. B. Markwardt
openalex +3 more sources
ASCA Observations of Transient X-Ray Sources in Quiescence [PDF]
Publications of the Astronomical Society of Japan, 1998 Soft X-ray transients are most probably low-mass binary systems containing either a neutron star (NS-LMXB) or a black hole (BH-LMXB). We have systematically investigated thirteen soft X-ray transients (four NS-LMXBs and nine BH-LMXBs) in the quiescent state using the available ASCA data.
Kazumi Asai +5 more
openalex +2 more sources