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The high stellar density in the central parsecs around the Galactic Centre makes it a seemingly favourable environment for finding relativistic binary pulsars. These include pulsars orbiting other neutron stars, stellar-mass black holes or…

High Energy Astrophysical Phenomena · Physics 2021-08-25 R. P. Eatough , P. Torne , G. Desvignes , M. Kramer , R. Karuppusamy , B. Klein , L. G. Spitler , K. J. Lee , D. J. Champion , K. Liu , R. S. Wharton , L. Rezzolla , H. Falcke

In the last 20 years our understanding of the millisecond pulsar (MSP) population changed dramatically. Thanks to RXTE, we discovered that neutron stars in LMXBs spins at 200-750 Hz frequencies, and indirectly confirmed the recycling…

High Energy Astrophysical Phenomena · Physics 2019-03-06 Sergio Campana , Tiziana Di Salvo

Binary neutron stars (BNSs) detected in the Milky Way have the total masses distributing narrowly around $\sim2.6-2.7M_\odot$, while the BNS merger GW190425 detected via gravitational wave has a significantly larger mass ($\sim3.4M_\odot$).…

High Energy Astrophysical Phenomena · Physics 2025-02-14 Qingbo Chu , Youjun Lu , Shenghua Yu

Since a large population of massive O/B stars and putative neutron stars (NSs) located in the vicinity of the Galactic center (GC), intermediate-mass X-ray binaries (IMXBs) constituted by a NS and a B-type star probably exist here. We…

High Energy Astrophysical Phenomena · Physics 2017-06-14 Quan Cheng , Shuang-Nan Zhang , Xiao-Ping Zheng

A white dwarf (WD) approaching the Chandrasekhar mass may in several cases undergo accretion-induced collapse (AIC) to a neutron star (NS) before a thermonuclear explosion ensues. It has generally been assumed that AIC does not produce a…

Astrophysics · Physics 2015-05-13 B. D. Metzger , A. L. Piro , E. Quataert

We propose a scenario for the formation of the pulsar with two white dwarfs (WDs) triple system PSR J0337+1715. In our scenario a close binary system is tidally and frictionally destroyed inside the envelope of a massive star that later…

Solar and Stellar Astrophysics · Physics 2015-06-23 Efrat Sabach , Noam Soker

There exists a special class of X-ray pulsars that exhibit very slow pulsation of $P_{\rm spin}>1000$ s in the high mass X-ray binaries (HMXBs). We have studied the temporal and spectral properties of these superslow pulsation neutron star…

High Energy Astrophysical Phenomena · Physics 2015-06-12 W. Wang

Single star evolution does not allow extremely low-mass stars to cross the classical instability strip (IS) during the Hubble time. However, within binary evolution framework low-mass stars can appear inside the IS once the mass transfer…

Solar and Stellar Astrophysics · Physics 2017-01-25 P. Karczmarek , G. Wiktorowicz , K. Iłkiewicz , R. Smolec , K. Stępień , G. Pietrzyński , W. Gieren , K. Belczynski

We analyze the observed distribution of the orbital eccentricity and period of binary radio pulsars in globular clusters using computational tools to simulate binary-single star interactions. Globular clusters have different groups of…

Solar and Stellar Astrophysics · Physics 2011-02-11 Manjari Bagchi , Alak Ray

Typical radio pulsars are magnetized neutron stars that are born rapidly rotating and slow down as they age on time scales of 10 to 100 million years. However, millisecond radio pulsars spin very rapidly even though many are billions of…

Astrophysics · Physics 2009-10-30 Deepto Chakrabarty , Edward H. Morgan

PSR J0955$-$6150 is a member of a class of eccentric MSP+He WD systems (eMSPs), whose binary evolution is poorly understood and believed to be different to that of traditional MSP+He WD systems. Measuring the masses of the stars in this…

We report the phase-connected timing ephemeris, polarization pulse profiles, Faraday rotation measurements, and Rotating-Vector-Model (RVM) fitting results of twelve millisecond pulsars (MSPs) discovered with the Five-hundred-meter Aperture…

Millisecond pulsars (MSPs) are thought to originate from low-mass X-ray binaries (LMXBs). The discovery of eclipsing radio MSPs including redbacks and black widows indicates that evaporation of the donor star by the MSP's irradiation takes…

High Energy Astrophysical Phenomena · Physics 2016-10-26 Kun Jia , Xiang-Dong Li

Most stars are born in clusters and the resulting gravitational interactions between cluster members may significantly affect the evolution of circumstellar discs and therefore the formation of planets and brown dwarfs. Recent findings…

Solar and Stellar Astrophysics · Physics 2010-06-18 Ingo Thies , Pavel Kroupa , Simon P. Goodwin , Dimitrios Stamatellos , Anthony P. Whitworth

It has been suggested that the accretion-induced collapse (AIC) of an oxygen-neon white dwarf (ONe WD) to a neutron star is a theoretically predicted outcome in stellar evolution, likely relating to the formation of some neutron star…

Solar and Stellar Astrophysics · Physics 2018-09-13 Bo Wang

If the theoretical relationship between white dwarf mass and orbital period for wide-orbit binary radio pulsars is assumed to be correct, then the neutron star mass of PSR J2019+2425 is shown to be ~1.20 M_sun. Hence the mass of the neutron…

Astrophysics · Physics 2007-05-23 T. M. Tauris

We model long-term magneto-rotational evolution of isolated neutron stars with long initial spin periods. This analysis is motivated by the recent discovery of young long-period neutron stars observed as periodic radio sources: PSR…

High Energy Astrophysical Phenomena · Physics 2024-01-22 M. D. Afonina , A. V. Biryukov , S. B. Popov

For about half a century the radio pulsar population was observed to spin in the ~0.002-12s range, with different pulsar classes having a spin-period evolution that differs substantially depending on their magnetic fields or past accretion…

High Energy Astrophysical Phenomena · Physics 2022-08-17 Michele Ronchi , Nanda Rea , Vanessa Graber , Natasha Hurley-Walker

Millisecond pulsars (MSPs) are neutron stars with spin periods as short as a few milliseconds, formed through mass accretion from companion stars. In the dense environments of globular clusters (GCs), MSPs are likely to originate through…

High Energy Astrophysical Phenomena · Physics 2025-11-13 Yuzhe Song , Debatri Chattopadhyay , Jarrod Hurley , Rainer Spurzem , Francesco Flammini Dotti , Kai Wu

RADIO pulsars are thought to born with spin periods of 0.02-0.5 s and space velocities of 100-1000 km/s, and they are inferred to have initial dipole magnetic fields of 10^{11}-10^{13}. The average space velocity of a normal star in the…

Astrophysics · Physics 2015-06-24 H. Spruit , E. S. Phinney
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