Results 11 to 20 of about 5,289 (173)

Radio Emission from an Ultraluminous X-Ray Source [PDF]

Science, 2003
The physical nature of ultraluminous x-ray sources is uncertain. Stellar mass black holes with beamed radiation and intermediate mass black holes with isotropic radiation are two plausible explanations.
Corbel, Stephane, Kaaret, Philip, Prestwich, Andrea H., Zezas, Andreas   +3 more
core   +6 more sources

Long-term X-ray Variability of Ultraluminous X-ray Sources [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Long-term X-ray modulations on timescales from tens to hundreds of days have been widely studied for X-ray binaries located in the Milky Way and the Magellanic Clouds.
Chou, Y., Hu, C. -P., Kong, A. K. H., Lin, L. C. -C., Takata, J., Yen, D. C. -C.   +5 more
core   +6 more sources

Observations of ultraluminous X-ray sources [PDF]

AIP Conference Proceedings, 2010
Ultraluminous X-ray sources (ULXs), first observed ~30 years ago, have been argued as extreme stellar mass black hole binaries or a new class intermediate mass black hole.
Gladstone, Jeanette Claire
core   +2 more sources

Ultraluminous X-ray Sources and Their Nebulae [PDF]

AIP Conference Proceedings, 2008
One of the interesting features of Ultraluminous X-ray sources is that many of them are surrounded by luminous nebulae exhibiting diverse observational properties. In different cases the nebulae are photoionized or shock-powered.
Magnus Axelsson, Pavel Abolmasov
core   +3 more sources

Nature of the Extreme Ultraluminous X-ray Sources [PDF]

The Astrophysical Journal, 2015
In this proof-of-concept study we demonstrate that in a binary system mass can be transferred toward an accreting compact object at extremely high rate. If the transferred mass is efficiently converted to X-ray luminosity (with disregard of the classical
Belczynski, Krzysztof, Sadowski, Aleksander, Sobolewska, Malgorzata, Wiktorowicz, Grzegorz   +3 more
core   +5 more sources

Compact radio emission in Ultraluminous X-ray sources [PDF]

Astronomische Nachrichten, 2011
We present results from our studies of radio emission from selected Ultraluminous X-ray (ULX) sources, using archival Giant Metrewave Radio Telescope (GMRT) data and new European VLBI Network (EVN) observations.
Becker, Begelman, Blair, Colbert, Corbel, Falcke, Fürst, Gallo, Kaaret, Körding, Lehmer, Liu, Lobanov, Merloni, Sánchez-Sutil   +14 more
core   +2 more sources

Ultraluminous X-ray Sources and Star Formation [PDF]

Monthly Notices of the Royal Astronomical Society, 2003
Chandra observations of the Cartwheel galaxy reveal a population of ultraluminous X-ray sources (ULXs) with lifetimes < 10^7 yr associated with a spreading wave of star formation which began some 3 x 10^8 yr ago.
King, Andrew R.
core   +3 more sources

X-ray reflection in a sample of X-ray bright Ultraluminous X-ray sources [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
We apply a reflection-based model to the best available XMM-Newton spectra of X-ray bright UltraLuminous X-ray (ULX) sources (NGC 1313 X-1, NGC 1313 X-2, M 81 X-6, Holmberg IX X-1, NGC 5408 X-1 and Holmberg II X-1).
A. C. Fabian, Abolmasov, Arnaud, Blandford, Brenneman, Brown, Cackett, Colbert, Dewangan, Dickey, Fabbiano, Fabbiano, Fabian, Feng, Fryer, Fryer, George, Gladstone, Goad, Guilbert, Hadfield, Kaaret, Karachentsev, King, Kubota, Laor, Li, Liu, M. D. Caballero-García, Makishima, Mapelli, Miller, Miller, Miller, Miller, Miniutti, Miyawaki, Nandra, Paczynski, Pakull, Pakull, Reis, Reis, Remillard, Roberts, Roberts, Ross, Soria, Stobbart, Strohmayer, Tanaka, Ueda, Winter   +52 more
core   +2 more sources

Spectral variability of ultraluminous X-ray sources [PDF]

AIP Conference Proceedings, 2008
We study spectral variability of 11 ultraluminous X-ray sources (ULX) using archived XMM-Newton and Chandra observations. We use three models to describe the observed spectra; a power-law, a multi-colour disk (MCD) and a combination of these two models ...
Abolmasov, Abramowicz, Arons, Begelman, Beloborodov, Berghea, Dewangan, Dewangan, Dickey, Fabbiano, Fabbiano, Feng, Feng, Feng, Feng, Feng, Freeland, Gierliński, Gladstone, Goad, Gonçalves, Haardt, Hui, Jari J. E. Kajava, Jaroszyński, Juri Poutanen, Kaaret, Kaaret, Kaaret, Kajava, Karachentsev, Kawaguchi, King, King, King, Kubota, Körding, Liu, Liu, Miller, Miller, Mushotzky, Pakull, Patruno, Poutanen, Poutanen, Press, Roberts, Roberts, Roberts, Shakura, Soria, Stobbart, Strohmayer, Strohmayer, Vierdayanti, Vikhlinin, Winter, Zdziarski, Zdziarski, Zdziarski   +60 more
core   +4 more sources

Ultraluminous X-Ray Sources [PDF]

Astrophysical Bulletin, 2021
32 pages, 21 figures, 1 ...
Fabrika S.N., Atapin K.E., Vinokurov A.S., Sholukhova O.N.   +3 more
openaire   +2 more sources