Voracious vortexes in cataclysmic variables. A multi-epoch tomographic study of HT Cassiopeia

@article{Neustroev2015VoraciousVI,
  title={Voracious vortexes in cataclysmic variables. A multi-epoch tomographic study of HT Cassiopeia},
  author={V. V. Neustroev and S. V. Zharikov and N. V. Borisov},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2015}
}
We present multi-epoch, time-resolved optical spectroscopic observations of the dwarf nova HT Cas, obtained during 1986, 1992, 1995 and 2005 with the aim to study the properties of emission structures in the system. We determined that the accretion disc radius, measured from the double-peaked emission line profiles, is persistently large and lies within the range of 0.45-0.52a, where a is the binary separation. This is close to the tidal truncation radius r_max=0.52a. This result contradicts… 
Voracious vortices in cataclysmic variables
In our earlier Paper I we showed that the accretion disc radius of the dwarf nova HT Cas in its quiescent state has not changed significantly during many years of observations. It has remained
Period Bouncer Cataclysmic Variable EZ Lyn in Quiescence
We report the study of the accretion disk structure of the period bouncer cataclysmic variable EZ Lyn (SDSS J080434.20+510349.2) in quiescence based on our new time-resolved photometric and
A systematic study of spiral density waves in the accretion discs of cataclysmic variables
Spiral density waves are thought to be excited in the accretion discs of accreting compact objects, including cataclysmic variable stars (CVs). Observational evidence has been obtained for a
New radial velocity observations of AH Her: evidence for material outside the tidal radius
Spectroscopic observations of AH Herculis during a deep quiescent state are put forward. We found the object in a rare long minima, allowing us to derive accurately the semi-amplitudes: $K_1 =121 \pm

References

SHOWING 1-10 OF 65 REFERENCES
On the observability of spiral structures in cataclysmic variable accretion discs
We use the grid of hydrodynamic accretion disc calculations of Stehle to construct orbital phase-dependent emission-line profiles of thin discs carrying spiral density waves. The observational
The eclipses of cataclysmic variables. I: HT Cassiopeiae
BVR and white-light photometric observations of the eclipsing dwarf nova HT Cas, obtained using a high-speed photometer and photomultiplier tube on the 2.1-m telescope at McDonald Observatory on 15
Radial velocity studies of cataclysmic binaries. II - The ultrashort period dwarf nova T Leonis
Spectroscopic and photometric observations of T Leo which reveal the object to be an ultrashort period dwarf nova are presented. In particular, the analysis indicates that T Leo has an orbital period
Substantial stream-disc overflow found in three-dimensional SPH simulations of cataclysmic variables
We study numerically the interaction of the infalling gas stream and the rim of the accretion disc in cataclysmic variables. The simulations were performed with a smoothed particle hydrodynamics
Structure of the pre-outburst accretion disk in SS Cygni
We present results of spectroscopic observations of SS Cygni performed at the 1.5 m telescope of the Loiano Observatory in June 2009, three days before a long outburst. Using results of these
Searching evidences for spiral shocks in the quiescent accretion disk
We present the results of spectral investigations of the cataclysmic variable IP Peg in quiescence. Optical spectra obtained on the 6-m telescope at the Special Astrophysical Observatory (Russia),
Dark spot, spiral waves and the SW Sextantis behaviour: it is all about UX Ursae Majoris
We present an analysis of time-resolved, medium resolution optical spectroscopic observations of UX UMa in the blue (3920‐5250 ˚ A) and red (6100‐7200 ˚ A) wavelength ranges, that were obtained in
Tidally distorted accretion discs in binary stars
The non-axisymmetric features observed in the discs of dwarf novae in outburst are usually considered to be spiral shocks, which are the non-linear relatives of tidally excited waves. This
The accretion disk in the post period-minimum cataclysmic variable SDSS J080434.20+510349.2
This study of SDSS0804 is primarily concerned with the double-hump shape in the light curve and its connection with the accretion disk in this bounce-back system. Time-resolved photometric and
The patchy accretion disc in HT Cassiopeiae
We reconstruct the temperatures and surface densities in the quiescent accretion disc in HT Cas by performing a Physical Parameter Eclipse Mapping analysis of archival UBVR observations. Using a
...
...