Results 21 to 30 of about 1,208,682 (349)

X-RAY MONITORING OF ULTRALUMINOUS X-RAY SOURCES [PDF]

The Astrophysical Journal, 2009
X-ray monitoring observations were performed with the Swift observatory of the ultraluminous X-ray sources Holmberg IX X-1, NGC 5408 X-1, and NGC 4395 X-2 and also of the nuclear X-ray source in NGC 4395. Holmberg IX X-1 remains in the hard X-ray spectral state as its flux varies by a factor of 7 up to an (isotropic) luminosity of 2.8E40 erg/s.
Kaaret, Philip, Feng, Hua
openaire   +2 more sources

X-Ray Burst Sources [PDF]

Monthly Notices of the Royal Astronomical Society, 1977
Since those reviews there have been very important new developments. First, a surprisingly new animal, GRO J1744—28 (better known as the Bursting Pulsar), made its debut in 1995. Second, but NOT last, in 1996/97 kHz pulsations were discovered in the persistent emission of several burst sources, and near coherent pulsations were detected in type I X-ray
openaire   +3 more sources

Catalogue of high-mass X-ray binaries in the Galaxy ($4^{th}$ edition) [PDF]

, 2006
We present a new edition of the catalogue of high-mass X-ray binaries in the Galaxy. The catalogue contains source name(s), coordinates, finding chart, X-ray luminosity, system parameters, and stellar parameters of the components and other characteristic
Bird, Caraveo, Chaty, Coe, E. P. J. van den Heuvel, Fabregat, Gotthelf, Grimm, Halpern, Hang, in't Zand, in't Zand, J. van Paradijs, Kaper, Kuntz, Kuulkers, Liu, Liu, Liu, Liu, Mereghetti, Mereghetti, Meurs, Miroshnichenko, Motch, Negueruela, Orosz, Pietsch, Q. Z. Liu, Reig, Ritter, Sakano, Skrutskie, Smith, Swartz, Torii, Torrejon, Walter, Winkler, Zezas, Zhang   +40 more
core   +5 more sources

Two-way tuning of structural order in metallic glasses

Nature Communications, 2020
While metallic glasses are expected to have tunable structures, these have rarely been demonstrated. Here, the authors combine temperature and pressure to show a two-way structural tuning in rare earth-based metallic glasses beyond the nearest-neighbor ...
Hongbo Lou, Zhidan Zeng, Fei Zhang, Songyi Chen, Peng Luo, Xiehang Chen, Yang Ren, Vitali B. Prakapenka, Clemens Prescher, Xiaobing Zuo, Tao Li, Jianguo Wen, Wei-Hua Wang, Hongwei Sheng, Qiaoshi Zeng   +14 more
doaj   +1 more source

Soft and Supersoft X-ray Sources in Symbiotic Stars [PDF]

, 2009
Assuming that soft X-ray sources in symbiotic stars result from strong thermonuclear runaways, and supersoft X-ray sources from weak thermonuclear runaways or steady hydrogen burning symbiotic stars, we investigate the Galactic soft and supersoft X-ray ...
Lu, Guoliang, Wang, Zhaojun, Zhang, Jun, Zhu, Chunhua   +3 more
core   +1 more source

Extragalactic X-ray Sources [PDF]

Symposium - International Astronomical Union, 1973
A review is given of the physical properties of extragalactic X-ray sources. The generation of X-rays as thermal bremsstrahlung, by the synchrotron mechanism or by Compton Scattering, is discussed. It is shown that each may be important depending on the circumstances.
openaire   +1 more source

The novel high-pressure/high-temperature compound Co12P7 determined from synchrotron data

Acta Crystallographica Section E: Crystallographic Communications, 2020
The structural properties of cobalt phosphides were investigated at high pressures and temperatures to better understand the behavior of metal-rich phosphides in Earth and planetary interiors. Using single-crystal X-ray diffraction synchrotron data and a
Claire Zurkowski, Barbara Lavina, Stella Chariton, Sergey Tkachev, Vitali Prakapenka, Andrew Campbell   +5 more
doaj   +1 more source

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., Buckley, D. A. H., Coe, M., Ehle, M., Filipovic, M. D., Haberl, F., Hatzidimitriou, D., La Palombara, N., Pietsch, W., Sturm, R., Tiengo, A.   +10 more
core   +5 more sources

Local structure of liquid gallium under pressure

Scientific Reports, 2017
In situ high energy X-ray pair distribution function (PDF) measurements, microtomography and reverse Monte Carlo simulations were used to characterize the local structure of liquid gallium up to 1.9 GPa.
Renfeng Li, Luhong Wang, Liangliang Li, Tony Yu, Haiyan Zhao, Karena W. Chapman, Yanbin Wang, Mark L. Rivers, Peter J. Chupas, Ho-kwang Mao, Haozhe Liu   +10 more
doaj   +1 more source

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   +2 more sources