Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Sonja Vrielmann"'
Autor:
R. W. Hilditch, Slavek M. Rucinski, P. G. Niarchos, Mercedes T. Richards, Edward M. Sion, Ignasi Ribas, Katalin Oláh, Birgitta Nordström, Janusz Kaluzny, Alvaro Gimenez, Petr Harmanec, Guillermo Torres, C. D. Scarfe, Sonja Vrielmann
Publikováno v:
Proceedings of the International Astronomical Union. 4:260-266
The present report covers the main developments in the field of close binaries during the triennium 2009-2012. In addition to scientific publications, there have been several opportunities for direct interaction of researchers working on close binari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::572e9a69b274059f46e66c5d0d337f0b
https://doi.org/10.1017/s1743921308025647
https://doi.org/10.1017/s1743921308025647
Publikováno v:
Astronomy & Astrophysics. 419:673-683
We present an XMM-Newton analysis of the cataclysmic variable T Leo. The X-ray light curve shows sinusoidal variation on a period P_x equal to 0.89^{+0.14}_{-0.10} times the previously spectroscopically determined orbital period. Furthermore, we find
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81fe2179ae878edbcb1f5db511c1580e
https://doi.org/10.1051/0004-6361:20035846
https://doi.org/10.1051/0004-6361:20035846
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 339:685-694
We present photometric, polarimetric and spectroscopic observations of the ROSAT source RX J0531.5‐4624 (UW Pic), previously identified as a polar. Our observations, spanning a decade, show that UW Pic undergoes very pronounced changes in accretion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b657e26067da25e047cbf6a683d9601b
https://doi.org/10.1046/j.1365-8711.2003.06209.x
https://doi.org/10.1046/j.1365-8711.2003.06209.x
Autor:
Warren Offutt, Sonja Vrielmann
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 338:165-175
We present an Eclipse Mapping analysis of ten eclipses taken during decline from superoutburst of the dwarf nova V2051 Oph. On decline from superoutburst the disc cools down considerably from nearly 50,000 K in the intermediate disc (approx. 0.2 R_L1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a1d4b2c8f20597cb611fa8f5615c09b
https://doi.org/10.1046/j.1365-8711.2003.06030.x
https://doi.org/10.1046/j.1365-8711.2003.06030.x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 334:608-620
We analyse simultaneous UBVR quiescent light curves of the cataclysmic variable V2051 Oph using the Physical Parameter Eclipse Mapping method in order to map the gas temperature and surface density of the disc for the first time. The disc appears opt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15c3d9a59cb178623615d055e1dc8312
https://doi.org/10.1046/j.1365-8711.2002.05544.x
https://doi.org/10.1046/j.1365-8711.2002.05544.x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 306:766-778
The tomographic method Physical Parameter Eclipse Mapping is a tool to reconstruct spatial distributions of physical parameters (like temperatures and surface densities) in accretion discs of cataclysmic variables. After summarizing the method, we ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4de78aed292dda471089243789c05c20
https://doi.org/10.1046/j.1365-8711.1999.02550.x
https://doi.org/10.1046/j.1365-8711.1999.02550.x
Publikováno v:
Highlights of Astronomy. 13:279-281
Even in the new millenium, many astronomical objects cannot be resolved spatially with any available telescope. Most stars are too small and galaxies are too far away to be imaged directly or in detail in the foreseeable future. However, advances in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7d01412eaccaea9060771b30efe6971
https://doi.org/10.1017/s1539299600015793
https://doi.org/10.1017/s1539299600015793
We report XMM-Newton observations of the intermediate polar (IP) GK Per on the rise to the 2002 outburst and compare them to Chandra observations during quiescence. We find an asymmetric spin light curve implying an asymmetric shape of a semi-transpa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::893a1c0e3c58c5ef4d7b6e8bf5543d45
Autor:
Patrick A. Woudt, Sonja Vrielmann, E. Oliveira, M. S. Catalán, Raymundo Baptista, Francisco Jablonski
We report the identification of cyclical changes in the orbital period of the eclipsing dwarf nova Z Cha. We used times of mid-eclipse collected from the literature and our new eclipse timings to construct an observed-minus-calculated diagram coverin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f1f372a7616292d813dd43f759b301
Autor:
Raymundo Baptista, Sonja Vrielmann
In this paper we present Physical Parameter Eclipse Mapping (PPEM) of UBVRI eclipse light curves of UU Aqr from high to low states. We used a simple, pure hydrogen LTE model to derive the temperature and surface density distribution in the accretion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d70fd5cccfb3b4af1d4992f576928de