Cataclysmic Variables with nuclear evolved donors 131
Observational studies of highly evolved cataclysmic variables
... C HAPTER 6 S UMMARY & D ISCUSSION I have presented analysis of four cataclysmic variables with orbital periods close to the minimum period for CVs (≈ 83 minutes: Gänsicke et al. 2009). All four sys- tems ...
167
Nova-like cataclysmic variables in the infrared
... an evolved secondary star that allows very high mass transfer rates and leads to sustained nuclear burning on the surface of the WD (Steiner & Diaz ...
24
X-rays from Cataclysmic Variables
... sequence donors and ...the donors must have larger radii than dwarfs in order to fill their Roche Lobes and are therefore evolved ...giant donors for them to be Lobe-filling. The absence of ...
41
On the evolutionary status of short-period cataclysmic variables
... The period minimum is caused by the response of the donor star to ongoing mass loss (e.g Paczynski 1981). Typ- ically, the donor shrinks in response to mass loss, causing the orbital period to decrease. When the donor ...
17
Searching for nova shells around cataclysmic variables
... Like the irradiation feedback mechanism, however, this nova cycle model does not explain why the NL fraction is highest around 3 h and declines towards longer periods. The cyclical evolution of CVs through nova, NL and ...
14
K band spectroscopy of pre cataclysmic variables
... In agreement with previous results, most pre-CV secondary stars in our sample turned out to have spectral types > ∼ M2V, and therefore will not evolve within Hubble time (e.g. Pols et al. 1998). As discussed in Sect. 2, ...
10
Photometric Mass Determinations of Eclipsing Cataclysmic Variables
... The origin of a nova eruption is at the boundary between the degenerate core of the white dwarf and the newly accreted, hydrogen-rich surface layer. The high gravity of the white dwarf, coupled with a substantial amount ...
300
Cataclysmic Variables in the First Year of the Zwicky Transient Facility
... 3.1. Spectroscopic Confirmations Many of the SEDM spectra were obtained near out- burst, when the accretion disk is dominant and produc- ing a blue continuum or weak absorption lines. Thus, the low resolution usually ...
27
An evolved donor star in the long period cataclysmic variable HS 0218+3229
... the donors) that form this sort of binary system. But accurate measurements of the component masses in CVs are, however, not an easy task. The donor stars are usually veiled by the ex- treme brightness of the ...
9
The evolutionary status of Cataclysmic Variables: Eclipse modelling of 15 systems
... Accepted XXX. Received YYY; in original form ZZZ ABSTRACT We present measurements of the component masses in 15 Cataclysmic Variables (CVs) - 6 new estimates and 9 improved estimates. We provide new ...
29
The evolutionary status of Cataclysmic Variables: Eclipse modelling of 15 systems
... The CVs with donor properties estimated from superhumps show a sizeable fraction of systems which appear to have evolved past the period minimum. As a result, 30 per cent of our sample appear to be post-period ...
19
The secondary stars in cataclysmic variables and low-mass X-ray binaries
... The linear fit (unweighted rms deviation = 0.10) is surprisingly better than the power-law fit (rms = 0.12); one would have expected a homologous relation between mass and period, and therefore a power law to be the best ...
15
1000 cataclysmic variables from the Catalina Real time Transient Survey
... 7.5 Spectroscopic completeness and the white-dwarf-dominated CVs One of the key features of the SDSS CV sample was a large number of systems with white-dwarf-dominated spectra and short orbital periods, P orb 100 min ...
35
Cataclysmic variables below the period gap: mass determinations of 14 eclipsing systems
... CV donors, the systems immediately below the period gap would not be expected to be far from thermal ...CV donors below the period gap (assuming of course that spot properties are similar at all ...
21
The evolution of cataclysmic variables
... highly evolved CVs undermines our confidence in the current models of compact binary evolution and formation, which are also used to describe the evolution of more complex systems, such as black hole binaries, ...
215
Characterisation of the Components in Cataclysmic Variables
... Then if the X-ray flux is eclipsed, as it should be with a simple equatorial boundary layer around the white dwarf, the location of the X-ray source can be pinpointed to a relatively [r] ...
213
The Magnetospheric Boundary in Cataclysmic Variables
... in Cataclysmic Variables Coel Hellier Astrophysics Group, Keele University, Keele, ...magnetic cataclysmic variables (MCVs) present a wealth of observational diagnostics for studying accretion ...
10
White Dwarfs in Cataclysmic Variables: An Update
... Abstract In this review, we summarize what is currently known about the surface temperatures of accreting white dwarfs in non- magnetic and magnetic cataclysmic variables (CVs) based upon synthetic spectral ...
6
Imaging the secondary stars in cataclysmic variables
... arXiv:astro-ph/0009023v1 1 Sep 2000 V. S. Dhillon and C. A. Watson Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK Abstract. The secondary, Roche-lobe filling stars in ...
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J-band spectroscopy of cataclysmic variables
... The spectrum of VY Aqr also shows a tentative detection of secondary star absorption features, particularly the headless water band seen at 1.33 m m.. The EF Peg continuum also shows a c[r] ...
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