Results 31 to 40 of about 17,748 (203)

OBSERVATIONS OF CATACLYSMIC VARIABLES AT KOLONICA OBSERVATORY

open access: yesOdessa Astronomical Publications, 2007
We present a small sample of our observations of cataclysmic variable stars obtained at Kolonica Observatory, The presented data for CI UMa, MR UMa and SW UM were obtained in 2006 and 2007. Our observations demonstrate that also the small telescopes with
S. Parimucha, P. Dubovsky, I. Kudzej
doaj   +1 more source

Searching for nova shells around cataclysmic variables [PDF]

open access: yes, 2015
We present the results of a search for nova shells around 101 cataclysmic variables (CVs), using Halpha images taken with the 4.2-m William Herschel Telescope (WHT) and the 2.5-m Isaac Newton Telescope Photometric Halpha Survey of the Northern Galactic ...
Dhillon, V. S.   +3 more
core   +2 more sources

Accretion in Cataclysmic Variable Stars [PDF]

open access: yes, 2005
We consider accretion onto the white dwarfs in cataclysmic variables in relation to nova eruptions, dwarf nova outbursts, hibernation and non-radial oscillations.
Warner, Brian, Woudt, Patrick A.
openaire   +2 more sources

Accretion in magnetic cataclysmic variables [PDF]

open access: yesAstrophysics and Space Science, 1987
AbstractWe discuss the arguments in favour of the suggestion that polars (AM Her systems) and intermediate polars (IP’s) have magnetic fields of the same order of magnitude, and form one single class of objects. The period distribution of magnetic cataclysmic variables is well explained if they evolve the same way as non magnetic systems, IP’s becoming
Hameury, JM   +3 more
openaire   +2 more sources

K-band spectroscopy of pre-cataclysmic variables [PDF]

open access: yes, 2007
Aims. There exists now substantial evidence for abundance anomalies in a number of cataclysmic variables (CVs), indicating that the photosphere of the secondary star incorporates thermonuclear processed material. However, the spectral energy distribution
Ali   +47 more
core   +2 more sources

Automatic Search of Cataclysmic Variables Based on LightGBM in LAMOST-DR7

open access: yesUniverse, 2021
The search for special and rare celestial objects has always played an important role in astronomy. Cataclysmic Variables (CVs) are special and rare binary systems with accretion disks.
Zhiyuan Hu   +3 more
doaj   +1 more source

Cataclysmic Variable Stars [PDF]

open access: yesHighlights of Astronomy, 1998
The evolution of single stars on and away from the main sequence is well understood. A degenerate core is formed in a star as the star leaves the main sequence and expands to a giant with a radius typically 50 - 500 Ro . Observationally it is known that most stars are members of binary systems, and among these many have orbital periods less than 100 y.
openaire   +1 more source

Theoretical spectra of cataclysmic variables [PDF]

open access: yesAstrophysics and Space Science, 1987
AbstractWe present two methods of modelling accretion disks in dwarf novae. The first one determines self-consistently the structure of a disk together with the radiation field. The computed theoretical spectra agree well with the observations of the dwarf nova WX Hyi in quiescence as well as in superoutburst.
S. Křiž, I. Hybený
openaire   +1 more source

The hybrid Nova Vul 2024 (=V615 Vul)

open access: yesAstronomy & Astrophysics
Context. Among galactic novae, many remain poorly characterized due to heterogeneous data, observational challenges, or heavy reddening along the Galactic plane.
Valisa P., Munari U., Albanese I.
doaj   +1 more source

Infrared spectroscopy of cataclysmic variables - II. Intermediate polars [PDF]

open access: yes, 1996
We present infrared (0.97-2.45 micron) spectra of the intermediate polars PQ Gem (RE0751+14), BG CMi and EX Hya. The spectra show strong Paschen, Brackett and HeI emission lines from the accretion disc/stream.
Dhillon, V. S.   +3 more
core   +2 more sources

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