Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Zdenek Sekanina"'
Autor:
Martin Kocher, Ivan Sisola, Petr Drac, Marie Cerna, Petr Utikal, Rohit Philip Thomas, Zdenek Sekanina, Petr Bachleda, Jiri Kozak, Katerina Langova
Publikováno v:
European Journal of Radiology. 73:672-676
Purpose Subintimal angioplasty is becoming more frequently used treatment option for patients with long arterial occlusions or diffuse atherosclerotic changes as an alternative to surgical treatment in claudicants especially in patients with critical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cb90353a68c566105841ff80f1ac6e8
https://doi.org/10.1016/j.ejrad.2008.12.019
https://doi.org/10.1016/j.ejrad.2008.12.019
Autor:
Zdenek Sekanina, Paul W. Chodas
Publikováno v:
The Astrophysical Journal. 687:1415-1422
Given the critical role of the bright sungrazer C/1843 D1, also called the Great March Comet of 1843, in hypotheses of the origin and evolution of the Kreutz system, a new orbital investigation of this comet was desirable. Closely inspecting Kreutz's
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fddfad709d6a733030d3688d6c3c13e
https://doi.org/10.1086/592081
https://doi.org/10.1086/592081
Autor:
Zdenek Sekanina, Paul W. Chodas
Publikováno v:
The Astrophysical Journal. 663:657-676
We examine the process of cascading fragmentation for the Kreutz sungrazer system to continue our exploration of its birth, orbital evolution, and temporal clumping. We modify and broaden the two-superfragment model from Paper I to include clusters o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94e20b16762ee68e3dd4e2f0dbbca6b0
https://doi.org/10.1086/517490
https://doi.org/10.1086/517490
Autor:
Zdenek Sekanina, Rainer Kracht
The goal of this investigation is to reinterpret and upgrade the astrometric and other data on comet C/1945 X1, the least prominent among the Kreutz system sungrazers discovered from the ground in the 20th century. The central issue is to appraise th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd7cdf2d1a23df0e1d42f0479f939a41
Autor:
Zdenek Sekanina
Publikováno v:
Proceedings of the International Astronomical Union. 2:211-220
The large numbers of nucleus fragments observed are a spectacular illustration of the process of cascading fragmentation in progress, a concept introduced to interpret the properties of the Kreutz system of sungrazers and comet D/1993 F2. The objecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c66958991a4d43123a8afcf6651d189c
https://doi.org/10.1017/s1743921307003249
https://doi.org/10.1017/s1743921307003249
Autor:
Zdenek Sekanina, Paul W. Chodas
Publikováno v:
The Astrophysical Journal Supplement Series. 161:551-586
Of the three major groups of comets approaching the Sun to between 6 and 12 solar radii and discovered with the coronagraphs on board SOHO, we investigate the Marsden and Kracht groups.We call these comets ''sunskirters'' to distinguish them from the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::351d4a07a8a95f4a994fd4571df155a6
https://doi.org/10.1086/497374
https://doi.org/10.1086/497374
Autor:
Zdenek Sekanina1
Publikováno v:
Astronomy. Mar2006, Vol. 34 Issue 3, p36-41. 6p. 6 Color Photographs, 2 Black and White Photographs, 1 Chart.
Autor:
Peter Tsou, Zdenek Sekanina, Donald E. Brownlee, Simon F. Green, F. Hörz, Michael E. Zolensky, Scott A. Sandford, Ray L. Newburn, Jochen Kissel, Thomas C. Duxbury, M. S. Hanner, Benton C. Clark
Publikováno v:
Science. 304:1764-1769
Images taken by the Stardust mission during its flyby of 81P/Wild 2 show the comet to be a 5-kilometer oblate body covered with remarkable topographic features, including unusual circular features that appear to be impact craters. The presence of hig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0afa351e1269380c452358db33a1ee2f
https://doi.org/10.1126/science.1097899
https://doi.org/10.1126/science.1097899
Autor:
Donald E. Brownlee, Thanasis E. Economou, Anthony J. Tuzzolino, Zdenek Sekanina, Simon F. Green
Publikováno v:
Science. 304:1769-1774
We interpret the nucleus properties and jet activity from the Stardust spacecraft imaging and the onboard dust monitoring system data. Triangulation of 20 jets shows that 2 emanate from the nucleus dark side and 16 emanate from sources that are on sl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0ae9665c81e569be5c94162fe6c856e
https://doi.org/10.1126/science.1098388
https://doi.org/10.1126/science.1098388
Autor:
Paul W. Chodas, Zdenek Sekanina
Publikováno v:
The Astrophysical Journal. 607:620-639
A back-and-forth orbit integration technique, developed for our previous investigation of the splitting of the parent of the sungrazers C/1882 R1 and C/1965 S1, is now applied in an effort to understand the history and orbital evolution of the Kreutz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::287049dfe1b6079f0473547f5a485933
https://doi.org/10.1086/383466
https://doi.org/10.1086/383466