Zobrazeno 1 - 10
of 380
pro vyhledávání: '"Kühnel M."'
Publikováno v:
EPJ Web of Conferences, Vol 64, p 02007 (2014)
X-ray binary systems consisting of a mass donating optical star and a highly magnetized neutron star, under the right circumstances, show quantum mechanical absorption features in the observed spectra called cyclotron resonant scattering features (CR
Externí odkaz:
https://doaj.org/article/6b1c09bd9d7f4c33a69ee82cbbca3d85
Autor:
Lomaeva, M., Grinberg, V., Guainazzi, M., Hell, N., Bianchi, S., Kühnel, M. Bissinger né, Fürst, F., Kretschmar, P., Martínez-Chicharro, M., Martínez-Núñez, S., Torrejón, J. M.
Publikováno v:
A&A 641, A144 (2020)
We present a $\sim$130 ks observation of the prototypical wind-accreting, high-mass X-ray binary Vela X-1 collected with XMM-Newton at orbital phases between 0.12 and 0.28. A strong flare took place during the observation that allows us to investigat
Externí odkaz:
http://arxiv.org/abs/2007.07260
Autor:
Fuerst, F., Kretschmar, P., Grinberg, V., Pottschmidt, K., Wilms, J., Kuehnel, M., Mellah, I. El, Martinez-Nunez, S.
Strongly magnetized, accreting neutron stars show periodic and aperiodic variability over a wide range of time scales. By obtaining spectral and timing information on these different time scales, we can have a closer look into the physics of accretio
Externí odkaz:
http://arxiv.org/abs/1904.03628
Autor:
Grinberg, V., Hell, N., Mellah, I. El, Neilsen, J., Sander, A. A. C., Leutenegger, M., Fürst, F., Huenemoerder, D. P., Kretschmar, P., Kühnel, M., Martínez-Núñez, S., Niu, S., Pottschmidt, K., Schulz, N. S., Wilms, J., Nowak, M. A.
Publikováno v:
A&A 608, A143 (2017)
Bright and eclipsing, the high-mass X-ray binary Vela X-1 offers a unique opportunity to study accretion onto a neutron star from clumpy winds of O/B stars and to disentangle the complex accretion geometry of these systems. In Chandra-HETGS spectrosc
Externí odkaz:
http://arxiv.org/abs/1711.06743
Autor:
Fuerst, F., Kretschmar, P., Kajava, J. J. E., Alfonso-Garzon, J., Kuehnel, M., Sanchez-Fernandez, C., Blay, P., Wilson-Hodge, C. A., Jenke, P., Kreykenbohm, I., Pottschmidt, K., Wilms, J., Rotschild, R. E.
Publikováno v:
A&A 606, A89 (2017)
The Be X-ray binary EXO 2030+375 was in an extended low luminosity state during most of 2016. We observed this state with NuSTAR and Swift, supported by INTEGRAL observations as well as optical spectroscopy with the NOT. We present a comprehensive sp
Externí odkaz:
http://arxiv.org/abs/1707.06496
Autor:
Gonzalez-Galan, A., Oskinova, L. M., Popov, S. B., Haberl, F., Kuehnel, M., Gallagher III, J. S., Schurch, M. P. E., Guerrero, M. A.
SXP 1062 is a Be X-ray binary located in the Small Magellanic Cloud. It hosts a long-period X-ray pulsar and is likely associated with the supernova remnant MCSNR J0127-7332. In this work we present a multi-wavelength view on SXP 1062 in different lu
Externí odkaz:
http://arxiv.org/abs/1706.05002
Autor:
Ferrigno, C., Ducci, L., Bozzo, E., Kretschmar, P., Kühnel, M., Malacaria, C., Pottschmidt, K., Santangelo, A., Savchenko, V., Wilms, J.
Publikováno v:
A&A 595, A17 (2016)
In July 2015, the high-mass X-ray binary V 0332+53 underwent a giant outburst, a decade after the previous one. This system hosts a strongly magnetized neutron star. During the 2004--2005 outburst, an anti-correlation between the centroid energy of i
Externí odkaz:
http://arxiv.org/abs/1607.03293
Autor:
Kühnel, M., Fernández, J. M., Tramonto, F., Tejeda, G., Moreno, E., Kalinin, A., Nava, M., Galli, D. E., Montero, S., Grisenti, R. E.
By means of Raman spectroscopy of liquid microjets we have investigated the crystallization process of supercooled quantum liquid mixtures composed of parahydrogen (pH$_2$) diluted with small amounts of up to 5\% of either neon or orthodeuterium (oD$
Externí odkaz:
http://arxiv.org/abs/1504.07444
Autor:
Schönherr, G., Schwarm, F. -W., Falkner, S., Dauser, T., Ferrigno, C., Kühnel, M., Klochkov, D., Kretschmar, P., Becker, P. A., Wolff, M. T., Pottschmidt, K., Falanga, M., Kreykenbohm, I., Fürst, F., Staubert, R., Wilms, J.
Publikováno v:
Astronomy & Astrophysics, Volume 564, L8, 2014
Context: Accretion-powered X-ray pulsars show highly energy-dependent and complex pulse-profile morphologies. Significant deviations from the average pulse profile can appear, in particular close to the cyclotron line energies. These deviations can b
Externí odkaz:
http://arxiv.org/abs/1405.6855
Autor:
Kühnel, M., Müller, S., Kreykenbohm, I., Fürst, F., Pottschmidt, K., Rothschild, R. E., Caballero, I., Grinberg, V., Schönherr, G., Shrader, C., Klochkov, D., Staubert, R., Ferrigno, C., Torrejón, J. -M., Martínez-Núñez, S., Wilms, J.
A study of archival RXTE, Swift, and Suzaku pointed observations of the transient high mass X-ray binary GRO J1008-57 is presented. A new orbital ephemeris based on pulse arrival timing shows times of maximum luminosities during outbursts of GRO J100
Externí odkaz:
http://arxiv.org/abs/1305.2936