Results 1 to 10 of about 29,884 (299)
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. Many of the ULXs, especially those containing magnetized neutron stars, are highly variable; some exhibit transient ...
J.-M. Hameury, J.-P. Lasota
openaire +4 more sources
A Catalog of Transient X‐Ray Sources in M31 [PDF]
Astrophysical Journal, 2006 63 pages, 22 figures, 3 tables, accepted for publication in ...
Williams, Benjamin F. +3 more
exaly +3 more sources
On the Distances to Transient X-Ray Sources
Astrophysical Journal, 1973 Estimation of the distance of three transient X-ray sources characterized by a rapid increase to a flux comparable with the strongest galactic X-ray sources, followed by a slower decay over a time scale of three to four months. A simple argument based only on X-ray data is presented, which yields a typical distance estimate on the order of a few ...
Joe Silk
exaly +2 more sources
Transient X-ray sources in the galactic plane
Astrophysical Journal, 1978 Uhuru observations of the galactic plane indicate the presence of four X-ray sources not previously characterized as transient: MX 0836-42, A1918+14, 4U 1730-22, and 4U 1807-10. X-ray light curves as well as positional and spectral information are presented for these sources and for 4U 1908+00, a recurrent transient source. The frequency, duration, and
William Forman +2 more
exaly +2 more sources
A Model for the Transient X-Ray Sources
Astrophysical Journal, 1974 Camilla Juul Hansen, H M Van Horn
exaly +2 more sources
A New Sample of Transient Ultraluminous X-Ray Sources Serendipitously Discovered by Swift/XRT
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 +1 more source
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
openaire +3 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
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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
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The transient ultraluminous X-ray source, ULX-4, in M51 [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present the results of a temporal and spectral analysis of the transient source ULX-4 in the galaxy M51. The data used were drawn from Chandra, XMM–Newton, and Swift-XRT archives, spanning the years 2000–2019.. The X-ray flux of the source is seen to vary by two orders of magnitudes within a month but a short-term variability
S Allak +8 more
openaire +6 more sources