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相关论文: The Evolution of Cataclysmic Variables Under Vario…

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The formation of low-mass X-ray binaries (LMXBs) is an ongoing challenge in stellar evolution. The important subset of LMXBs are the binary systems with a neutron star (NS) accretor. In NS LMXBs with non-degenerate donors, the mass transfer…

太阳与恒星天体物理 · 物理学 2023-10-18 K. X. Van , N. Ivanova

We apply the angular momentum loss rates inferred from open cluster stars to the evolution of cataclysmic variables (CVs). We show that the angular momentum prescriptions used in earlier CV studies are inconsistent with the measured…

天体物理学 · 物理学 2009-11-06 N. Andronov , M. Pinsonneault , A. Sills

I discuss population synthesis methods in the context of low-mass compact binaries. Two examples, both constraining the largely unknown strength of orbital angular momentum losses, illustrate the power and problems of such studies. For CVs,…

天体物理学 · 物理学 2007-05-23 Ulrich Kolb

Although the theory of cataclysmic variable (CV) evolution is able to explain several observational aspects, strong discrepancies have existed for decades between observations and theoretical predictions of the orbital period distribution,…

太阳与恒星天体物理 · 物理学 2019-09-30 Monica Zorotovic , Matthias R. Schreiber

We present a binary evolution study of cataclysmic variables (CVs) and related systems with white dwarf accretors, including for example, AM CVn systems, classical novae, supersoft X-ray sources, and systems with giant donor stars. Our…

太阳与恒星天体物理 · 物理学 2016-12-14 B. Kalomeni , L. Nelson , S. Rappaport , M. Molnar , J. Quintin , K. Yakut

The present-day formation of cataclysmic variables (CVs) with brown dwarf (BD) secondaries (0.013 M_sun < M_sec < 0.075 M_sun) is investigated using a population synthesis technique. Results from the latest, detailed models for BDs have…

天体物理学 · 物理学 2009-11-10 Michael Politano

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

We critically re-examine the available data on the spectral types, masses and radii of the secondary stars in cataclysmic variables (CVs) and low-mass X-ray binaries (LMXBs), using the new catalogue of Ritter & Kolb (1998) as a starting…

天体物理学 · 物理学 2009-10-30 D. A. Smith , V. S. Dhillon

One of the most important problems in the context of cataclysmic variables (CVs) is the lack of observations of systems with periods between 2 and 3.12 hours, known as the period gap. The orbital evolution of CVs with periods shorter than…

太阳与恒星天体物理 · 物理学 2018-11-28 C. Garraffo , J. J. Drake , J. D. Alvarado-Gomez , S. P. Moschou , O. Cohen

We extend a magnetic braking (MB) model, which has been used earlier to address the evolution of cataclysmic variables, to address the spin period $P_\mathrm{spin}$ evolution of fully convective M dwarf (FCMD) stars. The MB mechanism is an…

太阳与恒星天体物理 · 物理学 2023-09-18 Arnab Sarkar , Lev Yungelson , Christopher A. Tout

We apply population synthesis techniques to calculate the present day number of two types of white dwarf-main sequence star (WDMS) binaries within the cataclysmic variable period gap. The first are post-common envelope binaries with…

天体物理学 · 物理学 2009-11-13 P. J. Davis , U. Kolb , B. Willems , B. T. Gänsicke

Using improved, up-to-date stellar input physics tested against observations of low-mass stars and brown dwarfs we calculate the secular evolution of low-mass donor cataclysmic variables (CVs), including those which form with a brown dwarf…

天体物理学 · 物理学 2009-10-31 Ulrich Kolb , Isabelle Baraffe

Recently, large and homogeneous samples of cataclysmic variables (CVs) identified by the Sloan Digital Sky Survey (SDSS) were published. In these samples, the famous orbital period gap, which is a dearth of systems in the orbital period…

太阳与恒星天体物理 · 物理学 2024-02-06 Matthias R. Schreiber , Diogo Belloni , Axel D. Schwope

We revisit the evolution of low-mass close binary systems under different magnetic braking (MB) prescriptions. We study binaries with a neutron star accretor. During mass transfer episodes, these systems emit X-rays and are known as Low…

高能天体物理现象 · 物理学 2024-04-26 M. Echeveste , M. L. Novarino , O. G. Benvenuto , M. A. De Vito

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…

天体物理学 · 物理学 2009-11-10 A. Büning , H. Ritter

Large differences between the properties of the known sample of cataclysmic variable stars (CVs) and the predictions of the theory of binary star evolution have long been recognised. However, because all existing CV samples suffer from…

天体物理学 · 物理学 2008-11-26 Magaretha L. Pretorius , Christian Knigge , Ulrich Kolb

We have carried out an extensive population synthesis study of the ensemble properties of the present-day population of cataclysmic variables (PDCVs) that takes into account the nuclear evolution of high-mass donors close to the bifurcation…

太阳与恒星天体物理 · 物理学 2016-07-22 J. Goliasch , L. Nelson

The evolution of novae and Cataclysmic Variables (CVs) is driven by changes in the binary orbital periods. In a direct and critical test for various evolution models and their physical mechanisms, I measure the sudden changes in the period…

太阳与恒星天体物理 · 物理学 2023-08-02 Bradley E. Schaefer

Magnetic braking (MB) likely plays a vital role in the evolution of low-mass X-ray binaries (LMXBs). However, it is still uncertain about the physics of MB, and there are various proposed scenarios for MB in the literature. To examine and…

高能天体物理现象 · 物理学 2021-03-24 Zhu-Ling Deng , Xiang-Dong Li , Zhi-Fu Gao , Yong Shao

In this third of a series of papers related to cataclysmic variables (CVs) and related objects, we analyse the population of CVs in a set of 12 globular cluster models evolved with the MOCCA Monte Carlo code, for two initial binary…