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相关论文: Population types of cataclysmic variables in the s…

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Kinematical properties of CVs were investigated according to population types and orbital periods, using the space velocities computed from recently updated systemic velocities, proper motions and parallaxes. Reliability of collected space…

太阳与恒星天体物理 · 物理学 2015-06-24 T. Ak , S. Bilir , A. Özdönmez , F. Soydugan , E. Soydugan , C. Püsküllü , S. Ak , Z. Eker

Using high-precision astrometric data from Gaia DR3 and updated systemic velocities from the literature, kinematical properties of cataclysmic variables (CVs) were investigated. By constraining the data according to the total space velocity…

星系天体物理 · 物理学 2024-12-11 R. Canbay , T. Ak , S. Bilir , F. Soydugan , Z. Eker

Cataclysmic variables (CVs) are the most numerous population among the Galactic objects emitting in hard X-rays. Most probably, they are responsible for the extended hard X-ray emission of the Galactic ridge and the central Galactic…

高能天体物理现象 · 物理学 2022-02-23 Valery F. Suleimanov , Victor Doroshenko , Klaus Werner

The spatial distribution, galactic model parameters and luminosity function of cataclysmic variables (CVs) in the solar neighbourhood have been determined from a carefully established sample of 459 CVs. The sample contains all of the CVs…

天体物理学 · 物理学 2008-11-26 T. Ak , S. Bilir , S. Ak , Z. Eker

We present the first volume-limited sample of cataclysmic variables (CVs), selected using the accurate parallaxes provided by the second data release (DR2) of the ESA $\mathit{Gaia}$ space mission. The sample is composed of 42 CVs within…

We measure the spatial distribution and hard X-ray luminosity function of cataclysmic variables (CVs) using the INTEGRAL all-sky survey in the 17-60 keV energy band. The vast majority of the INTEGRAL detected CVs are intermediate polars…

天体物理学 · 物理学 2009-11-13 M. Revnivtsev , S. Sazonov , R. Krivonos , H. Ritter , R. Sunyaev

Using available astrometric and radial velocity data, the space velocities of cataclysmic variables (CVs) with respect to Sun were computed and kinematical properties of various sub-groups of CVs were investigated. Although observational…

星系天体物理 · 物理学 2014-11-20 T. Ak , S. Bilir , S. Ak , K. B. Coskunoglu , Z. Eker

In order to determine the spatial distribution, Galactic model parameters and luminosity function of cataclysmic variables (CVs), a $J$-band magnitude limited sample of 263 CVs has been established using a newly constructed…

星系天体物理 · 物理学 2015-06-22 A. Ozdonmez , T. Ak , S. Bilir

Every massive globular cluster (GC) is expected to harbour a significant population of cataclysmic variables (CVs). In this review, I first explain why GC CVs matter astrophysically, how many and what types are theoretically predicted to…

太阳与恒星天体物理 · 物理学 2012-02-13 Christian Knigge

We have been investigating populations of cataclysmic variables (CVs) in a set of more than 300 globular cluster (GC) models evolved with the MOCCA code. One of the main questions we have intended to answer is whether most CVs in GCs are…

星系天体物理 · 物理学 2020-03-18 Diogo Belloni , Mirek Giersz , Liliana E. Rivera Sandoval , Abbas Askar , Pawel Ciecielag

The gravitational wave (GW) signals from the Galactic population of cataclysmic variables (CVs) have yet to be carefully assessed. Here we estimate these signals and evaluate their significance for LISA. First, we find that at least three…

高能天体物理现象 · 物理学 2023-07-12 S. Scaringi , K. Breivik , T. B. Littenberg , C. Knigge , P. J. Groot , M. Veresvarska

We use an independent new sample of cataclysmic variables (CVs), constructed by selecting objects for Halpha emission, to constrain the properties of the intrinsic CV population. This sample is restricted to systems that are likely to be…

天体物理学 · 物理学 2009-11-13 Magaretha L. Pretorius , Christian Knigge

Binary evolution theory predicts that accreting white dwarfs with sub-stellar companions dominate the Galactic population of cataclysmic variables (CVs). In order to test these predictions, it is necessary to identify these systems, which…

太阳与恒星天体物理 · 物理学 2018-01-31 J. V. Hernandez Santisteban , C. Knigge , M. L. Pretorius , M. Sullivan , B. Warner

We compare the X-ray spectra and luminosities, in the 2-8 keV band, of known and suspected cataclysmic variables (CVs) in different environments, assessing the nature of these source populations. These objects include nearby CVs observed…

天体物理学 · 物理学 2009-06-23 Craig O. Heinke , Ashley J. Ruiter , Michael P. Muno , Krzysztof Belczynski

We present 855 cataclysmic variable candidates detected by the Catalina Real-time Transient Survey (CRTS) of which at least 137 have been spectroscopically confirmed and 705 are new discoveries. The sources were identified from the analysis…

The study of star clusters plays an important role in our understanding of the Universe since these systems are natural laboratories for testing theories of stellar dynamics and evolution. Particularly, globular clusters (GCs) are one of…

高能天体物理现象 · 物理学 2020-08-31 Diogo Belloni , Liliana E. Rivera Sandoval

The spatial distribution, Galactic model parameters and luminosity function of cataclysmic variables (CVs) are established using re-estimated trigonometric parallaxes of {\it Gaia} DR3. The data sample of 1,587 CVs in this study is claimed…

太阳与恒星天体物理 · 物理学 2023-03-29 R. Canbay , S. Bilir , A. Özdönmez , T. Ak

Although a large number of orbital periods of cataclysmic variable stars (CVs) have been measured, comparison of period and luminosity distributions with evolutionary theory is affected by strong selection effects. A test has been…

天体物理学 · 物理学 2009-11-07 R. C. North , T. R. Marsh , U. Kolb , V. S. Dhillon , C. K. J. Moran

We present the results of a systematic study of cataclysmic variables (CVs) and related systems, combining detailed binary-population synthesis (BPS) models with a grid of 120 binary evolution sequences calculated with a Henyey-type stellar…

天体物理学 · 物理学 2007-05-23 Ph. Podsiadlowski , Z. Han , S. Rappaport

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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