Results 41 to 50 of about 1,327,251 (363)
The XMM-Newton survey of the Small Magellanic Cloud: The X-ray point-source catalogue [PDF]
, 2013 Local-Group galaxies provide access to samples of X-ray source populations of whole galaxies. The XMM-Newton survey of the Small Magellanic Cloud (SMC) completely covers the bar and eastern wing with a 5.6 deg^2 area in the (0.2-12.0) keV band.
Ballet, J. +10 more
core +4 more sources
Altered chemistry of oxygen and iron under deep Earth conditions
Nature Communications, 2019 Iron oxides prevail in the deep Earth, at extreme pressures and temperatures, with different stoichiometries than in ambient conditions. Here, high-pressure synchrotron X-ray spectroscopic measurements reveal the oxidation states of Fe and O in iron ...
Jin Liu +9 more
doaj +1 more source
SPICES II. Optical and Near-Infrared Identifications of Faint X-Ray Sources from Deep Chandra Observations of Lynx [PDF]
, 2002 We present our first results on field X-ray sources detected in a deep, 184.7 ks observation with the ACIS-I camera on Chandra. The observations target the Lynx field of SPICES, and contains three known X-ray-emitting clusters out to z=1.27.
Chaffee, Frederic H. +12 more
core +2 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.
openaire +4 more sources
Near-Infrared Counterparts to Chandra X-ray Sources toward the Galactic Center. I. Statistics and a Catalog of Candidates [PDF]
, 2009 We present a catalog of 5184 candidate infrared counterparts to X-ray sources detected towards the Galactic center. The X-ray sample contains 9017 point sources detected in this region by the Chandra X-ray Observatory, including data from a recent deep ...
Bauer, Franz E. +5 more
core +2 more sources
International Astronomical Union Colloquium, 1986 AbstractType I cosmic X-ray bursts are widely thought to result from thermonuclear flashes in the surface layers of accreting neutron stars. The thermonuclear-flash model is able to account for a wide variety of observed burst phenomena. However, a number of theoretical and observational problems persist.
Fulvio Melia, Paul C. Joss
openaire +2 more sources
Ultraluminous X-ray Sources [PDF]
Proceedings of Accretion Processes in Cosmic Sources – II — PoS(APCS2018), 2019 Ultraluminous X-ray sources (ULXs) represent a class of binary systems that are more luminous than any black hole in our Galaxy. The nature of these objects remained unclear for a long time. The most popular models for the ULXs involve either intermediate mass black holes (IMBHs) or stellar-mass black holes accreting at super-Eddington rates.
openaire +3 more sources
XMM-Newton and Chandra X-ray follow-up observations of the VHE gamma-ray source HESS J1507-622 [PDF]
A&A 567, A74 (2014), 2014 Context. The discovery of the unique source HESS J1507-622 in the very high energy (VHE) range (100 GeV-100 TeV) opened new possibilities to study the parent population of ultra-relativistic particles found in astrophysical sources and underlined the possibility of new scenarios/mechanisms crucial for understanding the underlying astrophysical ...
arxiv +1 more source
The Submillimeter Properties of the 1 Ms Chandra Deep Field North X-ray Sample [PDF]
, 2001 We present submillimeter observations for 136 of the 370 X-ray sources detected in the 1 Ms exposure of the Chandra Deep Field North. Ten of the X-ray sources are significantly detected in the submillimeter.
A. E. Hornschemeier +9 more
core +2 more sources
Optical Sources Near the Bright X-Ray Source in NGC 1073 [PDF]
Astrophys.J. 629 (2005) 233-238, 2005 New HST observations show that the bright X-ray source in the face-on spiral galaxy NGC 1073 is located near a ring of recent star formation with an age of 8-16 Myr. This strengthens the association of X-ray sources in spiral galaxies emitting near or above the Eddington limit for a 20 solar mass black hole with recent star formation events.
arxiv +1 more source