Results 101 to 110 of about 6,438 (185)

Gravitational Redshift for Rapidly Rotating Neutron Stars

The Astrophysical Journal
The oblate Schwarzschild (OS) approximation is a method often used to compute the flux of X-rays emitted from a rapidly rotating neutron star. In this approximation, the oblate shape of the rotating star is embedded in the Schwarzschild metric, which is ...
Zsombor Jakab, Sharon M. Morsink
doaj   +1 more source

Comparing the Observational Properties of Rotation-Powered Binary Millisecond Pulsars with Various Companion Types

Universe
We compare the observational properties of rotation-powered binary millisecond pulsars (BMSPs) in the Galactic Field with various companion types. First, BMSPs with diverse companion types exhibit different properties in the relation of binary orbital ...
De-Hua Wang, Cheng-Min Zhang, Shuang-Qiang Wang   +2 more
doaj   +1 more source

A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437–4715

The Astrophysical Journal Letters
We report Bayesian inference of the mass, radius, and hot X-ray emitting region properties—using data from the Neutron Star Interior Composition ExploreR (NICER)—for the brightest rotation-powered millisecond X-ray pulsar, PSR J0437−4715. Our modeling is
Devarshi Choudhury, Tuomo Salmi, Serena Vinciguerra, Thomas E. Riley, Yves Kini, Anna L. Watts, Bas Dorsman, Slavko Bogdanov, Sebastien Guillot, Paul S. Ray, Daniel J. Reardon, Ronald A. Remillard, Anna V. Bilous, Daniela Huppenkothen, James M. Lattimer, Nathan Rutherford, Zaven Arzoumanian, Keith C. Gendreau, Sharon M. Morsink, Wynn C. G. Ho   +19 more
doaj   +1 more source

A Counterintuitive Correlation between Neutron Star Radii Inferred from Pulse Modeling and Surface Emission Beaming

The Astrophysical Journal
Thermal X-ray emission from rotation-powered millisecond pulsars, shaped by gravitational lensing and the beaming of the surface radiation, provides critical insights into neutron star properties. This approach has been the focus of observations with the
Tong Zhao, Dimitrios Psaltis, Feryal Özel   +2 more
doaj   +1 more source

Investigation of Accuracy of TOA and SNR of Radio Pulsar Signals for Vehicles Navigation. [PDF]

Sensors (Basel), 2023
Kabakchiev H, Behar V, Kabakchieva D, Kisimov V, Stefanova K.   +4 more
europepmc   +1 more source

A binary pulsar in a 53-minute orbit. [PDF]

Nature, 2023
Pan Z, Lu JG, Jiang P, Han JL, Chen HL, Han ZW, Liu K, Qian L, Xu RX, Zhang B, Luo JT, Yan Z, Yang ZL, Zhou DJ, Wang PF, Wang C, Li MH, Zhu M.   +17 more
europepmc   +1 more source

The Timing Evolution of the Magnetar Swift J1818.0–1607 during a Period of Reduced Activity

The Astrophysical Journal
We report results from an observational campaign of the radio-loud magnetar Swift J1818.0−1607 using the Green Bank Telescope at 2.0 GHz that began in 2021 November, during a period of reduced activity approximately 20 months after its 2020 March ...
Moaz Abdelmaguid, Paulo C. C. Freire, Joseph D. Gelfand, Yogesh Maan, Samayra Straal, J. A. J. Alford   +5 more
doaj   +1 more source

Discovery of a radio emitting neutron star with an ultra-long spin period of 76 seconds. [PDF]

Nat Astron, 2022
Caleb M, Heywood I, Rajwade K, Malenta M, Stappers B, Barr E, Chen W, Morello V, Sanidas S, van den Eijnden J, Kramer M, Buckley D, Brink J, Motta SE, Woudt P, Weltevrede P, Jankowski F, Surnis M, Buchner S, Bezuidenhout MC, Driessen LN, Fender R.   +21 more
europepmc   +1 more source

A Series of (Net) Spin-down Glitches in PSR J1522–5735: Insights from the Vortex Creep and Vortex Bending Models

The Astrophysical Journal
Through a detailed timing analysis of Fermi-LAT data, the rotational behavior of the γ -ray pulsar PSR J1522−5735 was tracked from 2008 August (MJD 54692) to 2024 January (MJD 60320).
S. Q. Zhou, W. T. Ye, M. Y. Ge, E. Gügercinoğlu, S. J. Zheng, C. Yu, J. P. Yuan, J. Zhang   +7 more
doaj   +1 more source

A radio pulsar phase from SGR J1935+2154 provides clues to the magnetar FRB mechanism. [PDF]

Sci Adv, 2023
Zhu W, Xu H, Zhou D, Lin L, Wang B, Wang P, Zhang C, Niu J, Chen Y, Li C, Meng L, Lee K, Zhang B, Feng Y, Ge M, Göğüş E, Guan X, Han J, Jiang J, Jiang P, Kouveliotou C, Li D, Miao C, Miao X, Men Y, Niu C, Wang W, Wang Z, Xu J, Xu R, Xue M, Yang Y, Yu W, Yuan M, Yue Y, Zhang S, Zhang Y.   +36 more
europepmc   +1 more source