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Spider pulsars are binary systems composed of a millisecond pulsar and a low-mass companion. Their X-ray emission, varying with orbital phase, originates from synchrotron radiation produced by high-energy electrons accelerated at the…

高能天体物理现象 · 物理学 2025-01-16 Jorge Cortés , Lorenzo Sironi

PSR J$1946+3417$ is a millisecond pulsar (MSP) with a spin period $P\simeq3.17\rm~ms$. Harbored in a binary with an orbital period $P_{\rm b}\simeq27$ days, the MSP is accompanied by a white dwarf (WD). The masses of the MSP and the WD were…

高能天体物理现象 · 物理学 2021-11-17 L. Jiang , Na Wang , Wen-Cong Chen , Wei-Min Liu , Chun-wei Leng , Jian-Ping Yuan , Xiang-Li Qian

We develop analytical tools and perform three-body simulations to investigate the orbital evolution and dynamical stability of binary planets within star clusters. Our analytical results show that the orbital stability of a planetary-mass…

地球与行星天体物理 · 物理学 2024-11-08 Yukun Huang , Wei Zhu , Eiichiro Kokubo

Many binary stellar systems in which the primary star is beyond the asymptotic giant branch (AGB) evolutionary phase show significant orbital eccentricities whereas current binary interaction models predict their orbits to be circularised.…

天体物理学 · 物理学 2009-11-13 A. A. Bonacic Marinovic , E. Glebbeek , O. R. Pols

Millisecond pulsars (MSPs) are powerful probes of globular clusters (GCs), tracing stellar evolution, cluster dynamics, and the local gravitational potential. We investigate the MSP population in GC Omega Centauri. We perform Fourier-domain…

We provide a method for analytically constructing high-accuracy templates for the gravitational wave signals emitted by compact binaries moving in inspiralling eccentric orbits. By contrast to the simpler problem of modeling the…

广义相对论与量子宇宙学 · 物理学 2009-11-10 Thibault Damour , Achamveedu Gopakumar , Bala R. Iyer

We have collected the parameter of 38 neutron stars (NSs) in binary systems with spin periods and measured masses. By adopting the Boot-strap method, we reproduced the procedure of mass calculated for each system separately, to determine…

高能天体物理现象 · 物理学 2013-03-28 Z. Cheng , A. Taani , Y. H. Zhao

We investigate the observational signatures associated with one of the proposed formation scenario for the recently discovered highly eccentric binary millisecond pulsar (MSP) PSR J1903+0327 in the galactic plane. The scenario requires that…

太阳与恒星天体物理 · 物理学 2009-10-02 Achamveedu Gopakumar , Manjari Bagchi , Alak Ray

The population synthesis of cataclysmic variables below the period is investigated. A grid of detailed binary evolutionary sequences has been calculated and included in the simulations to take account of additional angular momentum losses…

天体物理学 · 物理学 2009-11-13 B. Willems , U. Kolb , E. L. Sandquist , R. E. Taam , G. Dubus

The study of very short-period contact binaries provides an important laboratory in which the most important and problematic astrophysical processes of stellar evolution take place. Short-period contact systems, such as CC Com are…

太阳与恒星天体物理 · 物理学 2024-11-20 Dolunay Koçak

PSR J1802-2124 is a 12.6-ms pulsar in a 16.8-hour binary orbit with a relatively massive white dwarf (WD) companion. These properties make it a member of the intermediate-mass class of binary pulsar (IMBP) systems. We have been timing this…

Three-dimensional hydrodynamical simulations of common envelope evolution are often terminated soon after the initial dynamical plunge of the companion transitions into a long-lasting post-dynamical inspiral with slowly varying semi-major…

太阳与恒星天体物理 · 物理学 2025-05-15 Damien Gagnier , Ondrej Pejcha

We model the dynamics of test binaries in isotropic, multi-mass models of galactic globular clusters. The evolution of binary orbits through the cluster potentials is modeled, including second order diffusion terms, and probabilities for…

天体物理学 · 物理学 2008-11-26 Steinn Sigurdsson , E. S. Phinney

We report on eight millisecond pulsars (MSPs) in binary systems discovered with the Arecibo PALFA survey. Phase-coherent timing solutions derived from 2.5 to 5 years of observations carried out at Arecibo and Jodrell Bank observatories are…

Globular clusters host large populations of millisecond pulsars (MSPs) due to their high gravitational encounter rates, producing many binary systems and thus MSPs via the recycling process. Seven pulsars with spin periods ranging from 3 ms…

高能天体物理现象 · 物理学 2024-12-17 Justine Singleton , Megan DeCesar , Shi Dai , Deven Bhakta , Scott Ransom , Jay Strader , Laura Chomiuk , James Miller-Jones

Inspired by recent observations suggesting that the retrograde precession of the brown dwarf binary 2M1510 AB is consistent with induction by a polar circumbinary planet, we investigate the formation of such planets by studying the…

地球与行星天体物理 · 物理学 2025-07-01 Jeremy L. Smallwood , Thomas A. Baycroft , Amaury H. M. J. Triaud , Richard P. Nelson

PSR J1903+0327 is a mili-second pulsar with a mass of 1.67 M_{\odot} in a highly eccentric orbit (e=0.44) around a main-sequence star. This unique system cannot be reconciled with current observations where milli-second pulsars are…

高能天体物理现象 · 物理学 2015-05-30 Juthika Khargharia , John T. Stocke , Cynthia S. Froning , Achamveedu Gopakumar , Bhal Chandra Joshi

Spin-orbit coupling is widespread in binary asteroid systems and it has been widely studied for the case of ellipsoidal secondary. Due to angular momentum exchange, dynamical coupling is stronger when the orbital and rotational angular…

地球与行星天体物理 · 物理学 2024-08-01 Hanlun Lei

Redback millisecond pulsars (MSPs) typically show pronounced orbital variability in their X-ray emission due to our changing view of the intrabinary shock (IBS) between the pulsar wind and stellar wind from the companion. Some redbacks…

高能天体物理现象 · 物理学 2020-10-14 Pavan R. Hebbar , Craig O. Heinke , D. Kandel , Roger W. Romani , P. C. C. Freire

It has been suggested that accretion-induced collapse (AIC) is a non-negligible path for the formation of the observed neutron stars (NSs). An ONe white dwarf (WD) that accretes material from a He star may experience AIC process and…

太阳与恒星天体物理 · 物理学 2018-03-21 Dongdong Liu , Bo Wang , Wencong Chen , Zhaoyu Zuo , Zhanwen Han