Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Čadež, Andrej"'
Tidal effects on clumps of material during random non-stationary accretion onto a black hole produce phenomena with distinct temporal characteristics in observed light-curves. During such non-stationary accretion events, the shape of the accreting ob
Externí odkaz:
http://arxiv.org/abs/1204.4561
A relativistic positioning system has been proposed by Bartolom\'e Coll in 2002. Since then, several group developed this topic with different approaches. I will present a work done in collaboration with Ljubljana University and the ESA Advanced Conc
Externí odkaz:
http://arxiv.org/abs/1106.3168
Autor:
Gomboc, Andreja, Cadez, Andrej
To complement hydrodynamic studies of the tidal disruption of the star by a massive black hole, we present the study of stellar luminosity and its variations, produced by the strong gravitational field of the black hole during a close encounter. By s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502507
Autor:
Cadez, Andrej, Kostic, Uros
Publikováno v:
Phys.Rev. D72 (2005) 104024
Realistic modelling of radiation transfer in and from variable accretion disks around black holes requires the solution of the problem: find the constants of motion and equation of motion of a light-like geodesic connecting two arbitrary points in sp
Externí odkaz:
http://arxiv.org/abs/gr-qc/0405037
Spectroscopy of the Crab nebula along different slit directions reveals the 3 dimensional structure of the optical nebula. On the basis of the linear radial expansion result first discovered by Trimble (1968), we make a 3D model of the optical emissi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403153
Publikováno v:
2003pasb.conf...85V
We present a stroboscopic system developed for optical observations of pulsars and its application in the CLYPOS survey. The stroboscopic device is connected to a GPS clock and provides absolute timing to the stroboscopic shutter relative to the puls
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402041
Publikováno v:
Rev.Sci.Instrum. 74 (2003) 3111-3114
A stroboscope designed to observe pulsars in the optical spectrum is presented. The absolute phase of the stroboscope is synchronized to better than 2.5 microseconds with the known radio ephemerides for a given pulsar. The absolute timing is provided
Externí odkaz:
http://arxiv.org/abs/astro-ph/0303368
Publikováno v:
2001 A&A, 366, 930C
Optical photometry for the pulsar PSR0531+21 has been extended with new observations that strengthen evidence for a previously observed 60 seconds periodicity. This period is found to be increasing with time at approximately the same rate as the rota
Externí odkaz:
http://arxiv.org/abs/astro-ph/0303369
Photometric data of the Crab pulsar, obtained in stroboscopic mode over a period of more than eight years, are presented here. The applied Fourier analysis reveals a faint 60 second modulation of the pulsar's signal, which we interpret as a free prec
Externí odkaz:
http://arxiv.org/abs/astro-ph/0301328
A dedicated stroboscopic device was used to obtain optical spectra of the Crab main-pulse and inter-pulse as well as the spectrum of the underlying nebula when the pulsar is turned off. As the nebular emission is very inhomogeneous, our ability to ef
Externí odkaz:
http://arxiv.org/abs/astro-ph/0006075