Variable stars in the open cluster NGC 6791 and its surrounding field [PDF]
, 2007 Aims: This work presents a high--precision variability survey in the field of the old, super metal-rich open cluster NGC 6791. Methods: The data sample consists of more than 75,000 high-precision CCD time series measurements in the V band obtained ...
Bedin, L. R. +9 more
core +1 more source
SDSS J142625.71+575218.3: A Prototype for A New Class of Variable White Dwarf [PDF]
, 2008 We present the results of a search for pulsations in six of the recently discovered carbon-atmosphere white dwarf ("hot DQ") stars. On the basis of our theoretical calculations, the star SDSS J142625.71 + 575218.3 is the only object expected to pulsate ...
DeGennaro, Steven +5 more
core +1 more source
Disc–magnetosphere interactions in cataclysmic variable stars [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractI review, from an observational perspective, the interactions of accretion discs with magnetic fields in cataclysmic variable stars. I start with systems where the accretion flows via a stream, and discuss the circumstances in which the stream forms into an accretion disc, pointing to stars which are close to this transition.
openaire +2 more sources
The winds in cataclysmic variable stars [PDF]
AIP Conference Proceedings, 1986 Ultraviolet spectrophotometry of two dwarf novae, CN Ori and RX And, at various phases of their outburst cycles, confirms that the far UV flux increases dramatically about 1–2 days after the optical outburst begins. At this time the UV spectral line profiles indicate the presence of a high velocity wind.
France A. Córdova +2 more
openaire +1 more source
A Joint SRG/eROSITA + ZTF search: Discovery of a 97-min period eclipsing cataclysmic variable with evidence of a brown dwarf secondary [PDF]
Monthly notices of the Royal Astronomical SocietyCataclysmic variables (CVs) that have evolved past the period minimum during their lifetimes are predicted to be systems with a brown dwarf donor. While population synthesis models predict that around ≈40–70% of the Galactic CVs are post-period minimum
Ilkham Galiullin +26 more
semanticscholar +1 more source
Finding the most variable stars in the Orion Belt with the All Sky Automated Survey [PDF]
, 2010 We look for high-amplitude variable young stars in the open clusters and associations of the Orion Belt. We use public data from the ASAS-3 Photometric V-band Catalogue of the All Sky Automated Survey, infrared photometry from the 2MASS and IRAS ...
Acke +137 more
core +3 more sources
Accretion Discs in Cataclysmic Variable Stars [PDF]
International Astronomical Union Colloquium, 1997 AbstractAn overview is given of the spatial and time-dependent properties of the accretion discs in cataclysmic variable stars.
openaire +1 more source
Broad-band variability in accreting compact objects [PDF]
, 2014 Cataclysmic variable stars are in many ways similar to X-ray binaries. Both types of systems possess an accretion disk, which in most cases can reach the surface (or event horizon) of the central compact object.
Scaringi, Simone
core +5 more sources
Finding the unusual red giant remnants of cataclysmic variable mergers [PDF]
The Open Journal of AstrophysicsMergers between helium white dwarfs and main-sequence stars are likely common, producing red giant-like remnants making up roughly a few percent of all low-mass ( ≲2M⊙) red giants.
N. Z. Rui, J. Fuller
semanticscholar +1 more source
The systemic velocities of four long-period cataclysmic variable stars [PDF]
, 2002 Although a large number of orbital periods of cataclysmic variable (CV) stars have been measured, comparison of period and luminosity distributions with evolutionary theory is affected by strong selection effects.
R. North +7 more
semanticscholar +1 more source