Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Hanke, Manfred"'
Autor:
Hirsch, Maria, Hell, Natalie, Grinberg, Victoria, Ballhausen, Ralf, Nowak, Michael A., Pottschmidt, Katja, Schulz, Norbert S., Dauser, Thomas, Hanke, Manfred, Kallman, Timothy R., Brown, Gregory V., Wilms, Jörn
Publikováno v:
A&A 626, A64 (2019)
We present an analysis of three Chandra High Energy Transmission Gratings observations of the black hole binary Cyg X-1/HDE 226868 at different orbital phases. The stellar wind that is powering the accretion in this system is characterized by tempera
Externí odkaz:
http://arxiv.org/abs/1905.01262
Autor:
Miškovičová, Ivica, Hell, Natalie, Hanke, Manfred, Nowak, Michael A., Pottschmidt, Katja, Schulz, Norbert S., Grinberg, Victoria, Duro, Refiz, Madej, Oliwia K., Lohfink, Anne M., Rodriguez, Jérôme, Bel, Marion Cadolle, Bodaghee, Arash, Tomsick, John A., Lee, Julia C., Brown, Gregory V., Wilms, Jörn
Publikováno v:
A&A 590, A114 (2016)
The accretion onto the black hole in the system HDE 226868/Cygnus X-1 is powered by the strong line driven stellar wind of the O-type donor star. We study the X-ray properties of the stellar wind in the hard state of Cyg X-1 as determined with data f
Externí odkaz:
http://arxiv.org/abs/1604.00364
Autor:
Duro, Refiz, Dauser, Thomas, Grinberg, Victoria, Miškovičová, Ivica, Rodriguez, Jérôme, Tomsick, John, Hanke, Manfred, Pottschmidt, Katja, Nowak, Michael A., Kreykenbohm, Sonja, Bel, Marion Cadolle, Bodaghee, Arash, Lohfink, Anne, Reynolds, Christopher S., Kendziorra, Eckhard, Kirsch, Marcus G. F., Staubert, Rüdiger, Wilms, Jörn
Publikováno v:
A&A 589, A14 (2016)
We report on the analysis of the broad Fe Kalpha line feature of Cygnus X-1 in the spectra of four simultaneous hard intermediate state observations made with the X-ray Multiple Mirror mission (XMM-Newton), the Rossi X-ray Timing Explorer (RXTE), and
Externí odkaz:
http://arxiv.org/abs/1602.08756
Autor:
Irrgang, Andreas, Przybilla, Norbert, Heber, Ulrich, Böck, Moritz, Hanke, Manfred, Nieva, Maria-Fernanda, Butler, Keith
Publikováno v:
A&A 565, A63 (2014)
A precise quantitative spectral analysis - encompassing atmospheric parameter and chemical elemental abundance determination - is time consuming due to its iterative nature and the multi-parameter space to be explored, especially when done "by eye".
Externí odkaz:
http://arxiv.org/abs/1403.1122
Autor:
Gou, Lijun, McClintock, Jeffrey E., Remillard, Ronald A., Steiner, James F., Reid, Mark J., Orosz, Jerome A., Narayan, Ramesh, Hanke, Manfred, García, Javier
In Gou et al. (2011), we reported that the black hole primary in the X-ray binary Cygnus X-1 is a near-extreme Kerr black hole with a spin parameter a*>0.95(3{\sigma}). We confirm this result while setting a new and more stringent limit: a*>0.983 at
Externí odkaz:
http://arxiv.org/abs/1308.4760
Autor:
Boeck, Moritz, Grinberg, Victoria, Pottschmidt, Katja, Hanke, Manfred, Nowak, Michael A., Markoff, Sera B., Uttley, Phil, Rodriguez, Jerome, Pooley, Guy G., Suchy, Slawomir, Rothschild, Richard E., Wilms, Joern
We present the analysis of two long, quasi-uninterrupted RXTE observations of Cygnus X-1 that span several days within a 10 d interval. The spectral characteristics during this observation cover the region where previous observations have shown the s
Externí odkaz:
http://arxiv.org/abs/1107.4974
Autor:
Miškovičová, Ivica, Hanke, Manfred, Wilms, Jörn, Nowak, Michael A., Pottschmidt, Katja, Schulz, Norbert S.
The X-ray luminosity of black holes is produced through the accretion of material from their companion stars. Depending on the mass of the donor star, accretion of the material falling onto the black hole through the inner Lagrange point of the syste
Externí odkaz:
http://arxiv.org/abs/1103.2711
Autor:
Nowak, Michael A., Hanke, Manfred, Trowbridge, Sarah N., Markoff, Sera B., Wilms, Joern, Pottschmidt, Katja, Coppi, Paolo, Maitra, Dipankar, Davis, John E., Tramper, Frank
Using Suzaku and the Rossi X-ray Timing Explorer, we have conducted a series of four simultaneous observations of the galactic black hole candidate Cyg X-1 in what were historically faint and spectrally hard low states. Additionally, all of these obs
Externí odkaz:
http://arxiv.org/abs/1012.4801
Autor:
Fürst, Felix, Kreykenbohm, Ingo, Pottschmidt, Katja, Wilms, Jörn, Hanke, Manfred, Rothschild, Richard E., Kretschmar, Peter, Schulz, Norbert S., Huenemoerder, David P., Klochkov, Dmitry, Staubert, Rüdiger
We investigate the structure of the wind in the neutron star X-ray binary system Vela X-1 by analyzing its flaring behavior. Vela X-1 shows constant flaring, with some flares reaching fluxes of more than 3.0 Crab between 20-60 keV for several 100 sec
Externí odkaz:
http://arxiv.org/abs/1005.5243
Autor:
Hanke, Manfred, Wilms, Jörn, Nowak, Michael A., Barragán, Laura, Pottschmidt, Katja, Schulz, Norbert S., Lee, Julia C.
We present results from simultaneous observations of the high-mass X-ray binary system Cygnus X-1 / HDE 226868 with Suzaku, Chandra-HETGS, XMM-Newton, RXTE, INTEGRAL, and Swift in 2008 April. Performed shortly after orbital phase 0, when our line of
Externí odkaz:
http://arxiv.org/abs/1004.1117