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Related papers: A New Evolutionary Picture for CVs and LMXBs

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We know from observations that globular clusters are very efficient catalysts in forming unusual short-period binary systems or their offspring, such as low-mass X-ray binaries (LMXBs; neutron stars accreting matter from low-mass stellar…

Three black-hole low-mass X-ray binaries (LMXBs) in the Milky Way show rates of period decay which cannot be easily explained by standard mechanisms. Recently, it has been claimed that the anomalous period decays in two of these systems may…

High Energy Physics - Phenomenology · Physics 2026-03-04 Francesca Scarcella , Bradley J. Kavanagh

Close-orbit low-mass X-ray binaries (LMXBs), radio binary millisecond pulsars (BMSPs) with extremely low-mass helium WDs (ELM He~WDs) and ultra-compact X-ray binaries (UCXBs) are all part of the same evolutionary sequence. It is therefore…

Solar and Stellar Astrophysics · Physics 2021-03-17 Hai-Liang Chen , Thomas M. Tauris , Zhanwen Han , Xuefei Chen

Blue Large-Amplitude Pulsators (BLAPs) represent a recently identified class of pulsating stars distinguished by their short pulsation periods ($2 - 60$ minutes) and asymmetric light curves. This study investigated the evolutionary channel…

Solar and Stellar Astrophysics · Physics 2025-05-21 Zhengyang Zhang , Chengyuan Wu , Xianfei Zhang , Zhanwen Han , Bo Wang

Chandra observations of elliptical galaxies have revealed large numbers of Low Mass X-ray Binaries (LMXBs) accreting at rates above 10^-9 solar masses per year. One scenario which generates this transfer rate from an old stellar population…

Astrophysics · Physics 2009-11-07 Anthony L. Piro , Lars Bildsten

Contact binary systems (also known as W UMa systems) consist of a pair of hydrogen-burning dwarf stars orbiting each other so closely that they share a common envelope. Although they are relatively common, there is as yet no established…

Solar and Stellar Astrophysics · Physics 2013-10-03 Lawrence A. Molnar , Daniel M. Van Noord , Steven D. Steenwyk

Luminous X-ray binaries (>1E34 erg/s, LMXBs) have a neutron star or black hole primary, and in globular clusters, most of these close binaries are expected to be have evolved from wider binaries through dynamical interactions with other…

Astrophysics · Physics 2009-11-11 Joel N. Bregman

We present the results of the study of cataclysmic variables (CVs) and AM Canum Venaticorum (AM CVn) stars with our double dynamo (DD) formalism of angular momentum loss (AML) by magnetic braking (MB). We show that (1) our MB model…

Solar and Stellar Astrophysics · Physics 2024-01-09 Arnab Sarkar , Hongwei Ge , Lev Yungelson , Christopher A. Tout

We continue exploring our understanding of the collective properties of X-ray binaries in the stellar fields (i.e., outside globular clusters) of normal galaxies, introduced in Paper I of this series, where we considered high-mass X-ray…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Harshal Bhadkamkar , Pranab Ghosh

SuperWASP light curves for 53 W UMa-type eclipsing binary (EB) candidates, identified in previous work as being close to the contact binary short-period limit, were studied for evidence of period change. The orbital periods of most of the…

Solar and Stellar Astrophysics · Physics 2012-06-20 M. E. Lohr , A. J. Norton , U. C. Kolb , D. R. Anderson , F. Faedi , R. G. West

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…

High Energy Astrophysical Phenomena · Physics 2021-03-24 Zhu-Ling Deng , Xiang-Dong Li , Zhi-Fu Gao , Yong Shao

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…

Solar and Stellar Astrophysics · Physics 2018-11-28 C. Garraffo , J. J. Drake , J. D. Alvarado-Gomez , S. P. Moschou , O. Cohen

In dense stellar systems, dynamical interactions between objects lead to frequent formation of exotic stellar objects, unusual binaries, and systems of higher multiplicity. They are especially important for the formation of low mass X-ray…

High Energy Astrophysical Phenomena · Physics 2013-01-11 Natalia Ivanova

Continuing our exploration of the collective properties of low-mass X-ray binaries (LMXBs) in the stellar fields of normal galaxies, we compute in this paper the expected X-ray luminosity function (XLF) of LMXBs, starting from the results…

High Energy Astrophysical Phenomena · Physics 2013-01-08 Harshal Bhadkamkar , Pranab Ghosh

The period distribution of contact binaries exhibits a very sharp short period cut-off at 0.22 days. In order to provide valuable information on this short period limit, we observed ten totally eclipsing contact binaries with orbital…

Solar and Stellar Astrophysics · Physics 2019-03-20 Kai Li , Qi-Qi Xia , Raul Michel , Shao-Ming Hu , Di-Fu Guo , Xing Gao , Xu Chen , Dong-Yang Gao

We investigate the birthrate problem for low-mass X-ray binaries (LMXBs) and millisecond radio pulsars (MRPs) in this paper. We consider intermediate-mass and low-mss X-ray binaries (I/LMXBs) as the progenitors of MRPs, and calculate their…

High Energy Astrophysical Phenomena · Physics 2009-07-16 Dai Hailang , Li Xiangdong

BeppoSAX has detected a population of faint transient X-ray sources in the Galactic Centre. I show that a simple irradiated-disc picture gives a consistent fit to the properties of this population, and that it probably consists of low-mass…

Astrophysics · Physics 2009-10-31 Andrew R. King

Cataclysmic variable (CVs) are close interacting binaries in which a white dwarf accretes materials from a low mass main sequence companion. CVs can experience nova eruptions due to low mass transfer rates. In the standard theory of CV…

Solar and Stellar Astrophysics · Physics 2025-07-31 Wenshi Tang , Xiangdong Li , Bo Wang

We consider constraints on the formation of low-mass X-ray binaries containing neutron stars (NLMXBs) arising from the presence of soft X-ray transients among these systems. We show that in short-period systems driven by angular momentum…

Astrophysics · Physics 2009-10-28 A. R. King , U. Kolb

Apparent period variations detected in several eclipsing, close-compact binaries are frequently interpreted as being caused by circumbinary giant planets. This interpretation raises the question of the origin of the potential planets that…

Solar and Stellar Astrophysics · Physics 2015-06-12 M. Zorotovic , M. R. Schreiber