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Related papers: The age of cataclysmic variables: a kinematical st…

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We present time resolved CCD photometry of 15 cataclysmic variables (CVs) identified by the Sloan Digital Sky Survey (SDSS). The data were obtained as part of the 2004/05 International Time Programme on La Palma. We discuss the morphology…

Four samples of open star clusters (OSCs) with average ages of 5.2, 18.6, 40, and 61 Myr have been analyzed. The selection of these OSCs was carried out from a narrow region inclined to the galactic axis y at an angle of 25$^\circ$. The…

Astrophysics of Galaxies · Physics 2025-03-28 V. V. Bobylev , N. R. Ikhsanov , A. T. Bajkova

Outbursts in two classes of interacting binary systems, the symbiotic stars (SSs) and the cataclysmic variables (CVs), show a number of similarities in spite of very different orbital periods. Typical values for SSs are in the order of…

Solar and Stellar Astrophysics · Physics 2015-02-18 Augustin Skopal

Spiral shocks in cataclysmic variables (CVs) are the result of tidal interactions of the mass donor star with the accretion disc. Their study is fundamental for our understanding of angular momentum transfer in discs. In our quest to learn…

Astrophysics · Physics 2007-05-23 L. Morales-Rueda , T. R. Marsh

The stellar kinematics of the Galactic disk are main factors for constraining disk formation and evolution processes in the Milky Way (MW) Galaxy. In this paper we investigate a statistical relation between stellar Mass, Age and Velocity…

Astrophysics of Galaxies · Physics 2023-03-15 Hossein Fatheddin , Sedighe Sajadian

Cataclysmic Variables (CVs) are a distinct class of X-ray binaries transferring mass from a donor star to a compact star accretor, a white dwarf. They constitute a laboratory for accretion physics, mechanisms and disk theory together with…

High Energy Astrophysical Phenomena · Physics 2011-12-19 S. Balman

The spatial velocities of the stars with high-precision positions, proper motions and parallaxes from the Gaia TGAS catalog and line-of-sight velocities from the RAVE5 catalog are considered. From the sample of 92395 stars with the age…

Astrophysics of Galaxies · Physics 2017-12-20 V. V. Vityazev , A. S. Tsvetkov , V. V. Bobylev , A. T. Bajkova

The kinematics of galactic C-Miras are discussed on the basis of the bolometric magnitudes and radial velocities of Papers I and II of this series. Differential galactic rotation is used to derive a zero-point for the bolometric…

Astrophysics · Physics 2009-11-11 Michael W. Feast , Patricia A. Whitelock , John W. Menzies

We characterize the impact of several sources of systematic errors on the computation of the traceback age of the $\beta$ Pictoris Moving Group ($\beta$PMG). We find that uncorrected gravitational redshift and convective blueshift bias…

Astrophysics of Galaxies · Physics 2023-03-29 Dominic Couture , Jonathan Gagné , René Doyon

Studying the stellar kinematics of galaxies is a key tool in the reconstruction of their evolution. However, the current measurements of the stellar kinematics are complicated by several factors, including dust extinction and the presence…

We resume the discussion about irradiation-driven mass transfer cycles in semi- detached compact binary systems. The analytical model that describes the onset of these cycles, which occur on a thermal timescale of the donor star, is…

Astrophysics · Physics 2009-11-10 A. Büning , H. Ritter

We report follow-up studies of 35 recently-discovered cataclysmic variables (CVs), 32 of which were found in large, automated synoptic sky surveys. The objects were selected for observational tractability. For 34 of the objects we present…

Solar and Stellar Astrophysics · Physics 2016-12-14 John R. Thorstensen , Erek H. Alper , Kathryn E. Weil

We report on our second campaign to search for old nova shells around cataclysmic variables (CVs). Our aim was to test the theory that nova eruptions cause cycles in the mass transfer rates of CVs. These mass transfer cycles change the…

Solar and Stellar Astrophysics · Physics 2021-12-22 D. I. Sahman , V. S. Dhillon

AM Her variables -- synchronised magnetic cataclysmic variables (CVs) -- exhibit a different period distribution from other CVs across the period gap. We show that non-AM Her systems may infiltrate the longer-period end of the period gap if…

Astrophysics · Physics 2009-11-07 R. F. Webbink , D. T. Wickramasinghe

The large sample of main sequence stars with Hipparcos parallaxes and estimates of the radial velocity has been used to study the relations among kinematics, age and heavy element content for the solar neighbourhood. The samples with V> -30…

Astrophysics · Physics 2007-05-23 V. Caloi , D. Cardini , F. D'Antona , M. Badiali , A. Emanuele , I. Mazzitelli

Strong selection effects are present in observational samples of cataclysmic variables (CVs), complicating comparisons to theoretical predictions. The selection criteria used to define most CV samples discriminate heavily against the…

Astrophysics · Physics 2009-11-13 Magaretha L. Pretorius , Christian Knigge

Recent spectroscopic observations have identified several cataclysmic variables non-solar metal abundances. We present theoretical models which examine the level of core evolution expected for CV secondaries prior to contact. Our results…

Astrophysics · Physics 2015-06-24 Steve B. Howell

The Gaia mission has opened a new window into the internal kinematics of young star clusters at the sub-km/s level, with implications for our understanding of how star clusters form and evolve. We use a sample of 28 clusters and…

Astrophysics of Galaxies · Physics 2019-01-09 Michael A. Kuhn , Lynne A. Hillenbrand , Alison Sills , Eric D. Feigelson , Konstantin V. Getman

Cataclysmic Variables (CVs) are interacting binaries consisting of at least three components that control their colour and magnitude. Using Gaia we here investigate the influence of the physical properties of these binaries on their…

Solar and Stellar Astrophysics · Physics 2019-12-04 Javier Abril , Linda Schmidtobreick , Alessandro Ederoclite , Carlos López-Sanjuan

Using selection criteria based on amplitude, time and color, we have identified 329 objects as known or candidate cataclysmic variable (CVs) during the first year of testing and operation of the Zwicky Transient Facility (ZTF). Of these, 90…

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