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We have used the Green Bank Telescope to observe the millisecond pulsar PSR J0514-4002A on 43 occasions spread over 2 years. This 5-ms pulsar is located in the globular cluster NGC 1851; it belongs to a binary system and has a highly…

天体物理学 · 物理学 2011-02-11 Paulo C. Freire , Scott M. Ransom , Yashwant Gupta

The binary pulsar J0737-3039 is the only known system having two observable pulsars, thus offering a unique laboratory to test general relativity and explore pulsar physics. Based on the low eccentricity and the position within the galactic…

高能天体物理现象 · 物理学 2015-06-16 Simone Dall'Osso , Tsvi Piran , Nir Shaviv

We describe Keck-telescope spectrophotometry and imaging of the companion of the ``black widow" pulsar PSR~J0952$-$0607, the fastest known spinning neutron star (NS) in the disk of the Milky Way. The companion is very faint at minimum…

高能天体物理现象 · 物理学 2022-08-03 Roger W. Romani , D. Kandel , Alexei V. Filippenko , Thomas G. Brink , WeiKang Zheng

PSR J0514-4002A is a 5-ms pulsar is located in the globular cluster NGC 1851; it belongs to a highly eccentric (e = 0.888) binary system. It is one of the earliest known examples of a numerous and fast-growing class of eccentric binary MSPs…

天体物理学 · 物理学 2008-11-26 Paulo C. C. Freire , Scott M. Ransom , Yashwant Gupta

We report the discovery of the 20.7 ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope…

We propose a pulsar candidate cross matching algorithm to sift radio pulsar search candidates from repeated observations of the same sky location such as globular clusters, high energy sources, or supernova remnants. Our method uses both…

高能天体物理现象 · 物理学 2026-03-12 Qiuyu Yu , Yujie Wang , Zhichen Pan , Zhongli Zhang , Lei Qian , Zhongzu Wu , Ralph P. Eatough , Dejiang Yin , Baoda Li , Yujie Chen , Yinfeng Dai , Yifeng Li

We report on the results of a search for radio pulsars in five supernova remnants (SNRs) with FAST. The observations were made using the 19-beam receiver in the Snapshot mode. The integration time for each pointing is 10 min. We discovered…

高能天体物理现象 · 物理学 2024-02-28 Zhen Zhang , Wen-Ming Yan , Jian-Ping Yuan , Na Wang , Jun-Tao Bai , Zhi-Gang Wen , Bao-Da Li , Jin-Tao Xie , De Zhao , Yu-Bin Wang , Nan-Nan Zhai

The recent discovery of a population of eccentric (e ~ 0.1) millisecond pulsar (MSP) binaries with low-mass white dwarf companions in the Galactic field represents a challenge to evolutionary models that explain MSP formation as recycling:…

高能天体物理现象 · 物理学 2016-12-21 E. D. Barr , P. C. C. Freire , M. Kramer , D. J. Champion , M. Berezina , C. G. Bassa , A. G. Lyne , B. W. Stappers

Neutron stars in close binary systems have the potential to spin up to millisecond periods due to the accretion of matter and angular momentum from their low-mass companions. In later stages of this process, they sometimes start to swing…

高能天体物理现象 · 物理学 2026-05-22 S. V. Karpov , Artyom S. Tanashkin , G. M. Beskin , V. L. Plokhotnichenko , Y. A. Shibanov , D. A. Zyuzin

Despite its importance to our understanding of physics at supranuclear densities, the equation of state (EoS) of matter deep within neutron stars remains poorly understood. Millisecond pulsars (MSPs) are among the most useful astrophysical…

We present the discovery of 528.6 Hz pulsations in the new X-ray transient MAXI J1816-195. Using NICER, we observed the first recorded transient outburst from the neutron star low-mass X-ray binary MAXI J1816-195 over a period of 28 days.…

The double pulsar PSR J0737-3039A/B consists of two neutron stars in a highly relativistic orbit that displays a roughly 30-second eclipse when pulsar A passes behind pulsar B. Describing this eclipse of pulsar A as due to absorption…

Context. Two millisecond pulsars, PSR J1513$-$2550 and PSR J2017$-$1614, with spin periods of about 2.1 and 2.3 ms were recently discovered in the radio and $\gamma$-rays and classified as black widow pulsars in tight binary stellar systems…

We report the discovery and initial timing observations of a 55.7-ms pulsar, J0609+2130, found during a 430-MHz drift-scan survey with the Arecibo radio telescope. With a spin-down rate of $3.1 \times 10^{-19}$ s s$^{-1}$ and an inferred…

We report on 22 yrs of radio timing observations of the millisecond pulsar J1024$-$0719 by the telescopes participating in the European Pulsar Timing Array (EPTA). These observations reveal a significant second derivative of the pulsar spin…

We report the discovery of two young isolated radio pulsars with very high inferred magnetic fields. PSR J1119-6127 has period P = 0.407 s, and the largest period derivative known among radio pulsars, Pdot = 4.0e-12. Under standard…

天体物理学 · 物理学 2009-10-31 F. Camilo , V. M. Kaspi , A. G. Lyne , R. N. Manchester , J. F. Bell , N. D'Amico , N. P. F. McKay , F. Crawford , .

A search was carried out for pulsars with periods (P) from 2 to 90 s in daily observations carried out over an interval of 5 years in a area measuring 6300 sq.deg. The data was obtained on a Large Phased Array (LPA) at a frequency of 111…

高能天体物理现象 · 物理学 2025-04-22 S. A. Tyul'bashev , G. E. Tyul'basheva

We have detected the rare phenomenon of stable, drifting sub-pulse behaviour in two pulsars discovered in the recent Swinburne intermediate latitude pulsar survey. The pulsars; PSR J1231-47 and PSR J1919+0134, have approximate periods (P)…

天体物理学 · 物理学 2009-11-07 S. M. Ord , R. Edwards , M. Bailes

We present observations of fields containing eight recently discovered binary millisecond pulsars using the telescopes at MDM Observatory. Optical counterparts to four of these systems are detected, one of which, PSR J2214+3000, is a novel…

高能天体物理现象 · 物理学 2015-06-18 Joshua Schroeder , Jules Halpern

We conducted high-precision timing of PSR J1946+2052 to determine the masses of the two neutron stars in the system, test general relativity (GR) and assessed the system's potential for future measurement of the moment of inertia of the…