Zobrazeno 1 - 10
of 157
pro vyhledávání: '"Gierlinski, M."'
Active galactic nuclei (AGN) and galactic black hole binaries (GBHs) represent two classes of accreting black holes. They both contain an accretion disc emitting a thermal radiation, and a non-thermal X-ray emitting corona. GBHs exhibit state transit
Externí odkaz:
http://arxiv.org/abs/1102.0798
Publikováno v:
Mon.Not.Roy.Astron.Soc.402:767-775,2010
We consider implications of a possible presence of a Thomson-thick, low-temperature, plasma cloud surrounding the compact object in the binary system Cyg X-3. The presence of such a cloud was earlier inferred from the energy-independent orbital modul
Externí odkaz:
http://arxiv.org/abs/0905.1086
Publikováno v:
Mon.Not.Roy.Astron.Soc.398:L16,2009
We have carried out a survey of long 50ks XMM-Newton observations of a sample of bright, variable AGN. We found a distinctive energy dependence of the variability in RXJ0136.9-3510 where the fractional variability increases from 0.3 to 2 keV, and the
Externí odkaz:
http://arxiv.org/abs/0903.4698
We draw a comparison between AGN and Galactic black hole binaries using a uniform description of spectral energy distribution of these two classes of accreting X-ray sources. We parametrize spectra of GBHs with an alpha_GBH parameter which we define
Externí odkaz:
http://arxiv.org/abs/0901.2150
(abridged) The soft excess seen in the X-ray spectra of many high mass accretion rate AGN can be well modelled by reflection from a partially ionised accretion disc. However, the derived parameters are often extreme, both in terms of the underlying s
Externí odkaz:
http://arxiv.org/abs/0704.2970
Publikováno v:
Mon.Not.Roy.Astron.Soc.377:1006-1016,2007
We perform a comprehensive analysis of the superorbital modulation in the ultracompact X-ray source 4U 1820-303, consisting of a white dwarf accreting onto a neutron star. Based on RXTE data, we measure the fractional amplitude of the source superorb
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701470
Publikováno v:
Mon.Not.Roy.Astron.Soc.377:1017-1023,2007
We report the discovery, using RXTE data, of a dependence of the X-ray orbital modulation depth on the X-ray spectral state in the ultracompact atoll binary \source. This state (measured by us by the position on the X-ray colour-colour diagram) is ti
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701472
Publikováno v:
Mon.Not.Roy.Astron.Soc.370:1534-1540,2006
Values of black hole masses are frequently determined with the help of the reverberation method. This method requires a specific geometrical factor related to the distribution of the orbits of the Broad Line Region clouds. Onken et al. determined the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606621
Publikováno v:
Mon.Not.Roy.Astron.Soc.349:393,2004
We compare the evolution of spectral shape with luminosity in GRS 1915+105 with that of 'normal' black holes. The pathological time variability of GRS 1915+105 does not indicate that it belongs in a different class to all the other objects. At compar
Externí odkaz:
http://arxiv.org/abs/astro-ph/0308536
Publikováno v:
Astrophys.J. 583 (2003) 416-423
We follow the timing properties of the neutron star low-mass X-ray binary system 4U 1705-44 in different spectral states, as monitored by the Rossi X-ray Timing Explorer over about a month. We fit the power density spectra using multiple Lorentzians.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0209467