Results 21 to 30 of about 427 (123)

Invariable X-Ray Profile and Flux of the Crab Pulsar during Its Two Glitches

The Astrophysical Journal, 2022
Abstract We compare the X-ray profiles and fluxes of the Crab pulsar before and after the glitches in 2017 and 2019, using the data collected by the Insight-HXMT, NICER, and Fermi/GBM, to test whether there is any evidence for magnetosphere rearrangement after glitch.
Y. H. Zhang, M. Y. Ge, F. J. Lu, Y. L. Tuo, L. M. Song, S. N. Zhang, L. J. Wang, S. J. Zheng, L. L. Yan   +8 more
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Are fast radio bursts produced by large glitches of anomalous x-ray pulsars?

Physics & Astronomy International Journal, 2023
Phase transitions within anomalous X-ray pulsars (AXPs) and soft γ-ray repeaters (SGRs) can lead to mini contractions. Such contractions produce pulsar gliches and shock break outs from their surface accompanied by thermal X/γ -ray emission. Highly relativistic dipolar e+e− bunches launched from the pulsar polar caps emit fast radio bursts (FRBs) of ...
Shlomo Dado, Arnon Dar, Shlomo Dado, Arnon Dar   +3 more
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All at Once: Transient Pulsations, Spin-down, and a Glitch from the Pulsating Ultraluminous X-Ray Source M82 X-2 [PDF]

The Astrophysical Journal, 2020
Abstract The first pulsating ultraluminous X-ray source (PULX) to be identified is M82 X-2. After the discovery in 2014, NuSTAR observed the M82 field 15 times throughout 2015 and 2016. In this paper, we report the results of pulsation searches in all of these data sets and find only one new detection.
Matteo Bachetti, Thomas J. Maccarone, Murray Brightman, McKinley C. Brumback, Felix Fürst, Fiona A. Harrison, Marianne Heida, Gian Luca Israel, Matthew J. Middleton, John A. Tomsick, Natalie A. Webb, Dominic J. Walton   +11 more
openaire   +6 more sources

Glitch-free X-ray absorption spectrum under high pressure obtained using nano-polycrystalline diamond anvils [PDF]

Journal of Synchrotron Radiation, 2012
Nano-polycrystalline diamond (NPD) [Irifune et al. (2003), Nature (London), 421, 599] has been used to obtain a glitch-free X-ray absorption spectrum under high pressure. In the case of conventional single-crystal diamond (SCD) anvils, glitches owing to Bragg diffraction from the anvils are superimposed on X-ray absorption spectra.
Ishimatsu, Naoki, Matsumoto, Ken, Maruyama, Hiroshi, Kawamura, Naomi, Mizumaki, Masaichiro, Sumiya, Hitoshi, Irifune, Tetsuo   +6 more
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Evolution of Neutron Stars and Observational Constraints

EPJ Web of Conferences, 2010
The structure and evolution of neutron stars is discussed with a view towards constraining the properties of high density matter through observations.
Lattimer J.
doaj   +1 more source

DYNAMICAL OSCILLATIONS AND GLITCHES IN ANOMALOUS X-RAY PULSARS

The Astrophysical Journal, 2010
Recently reported observations of magnetar glitches and coincident X-ray long-term brightening events establish enough of a database to indicate that the brightening events are accompanied by glitches at their outset, and that they are probably triggered by the same event that triggers the glitch. We suggest, on the basis of various observational clues,
David Eichler, Rashid Shaisultanov
openaire   +1 more source

Linking the X-ray timing and spectral properties of the glitching AXP 1RXS J170849-400910 [PDF]

Astronomy & Astrophysics, 2007
Submitted to A&A, 4 pages; results presented at the INT meeting "The Neutron Star Crust and Surface: Observations and Models" on June 27; referee comments ...
Israel, G. L., Gotz, D., Zane, S., Dall'osso, S., Rea, N., Stella, L.   +5 more
openaire   +2 more sources

Diffraction Losses in a Stack of Diamond X-Ray Lenses

Photonics
Compound refractive lenses, crafted from single-crystal materials like diamond and silicon, are increasingly favored, particularly in cutting-edge facilities, such as free electron lasers and fourth-generation synchrotrons.
Nataliya Klimova, Anatoly Snigirev
doaj   +1 more source

Glitches in the X-ray pulsar 1E 2259+586

The Astrophysical Journal, 1994
Starquakes are considered for fast-rotating magnetic white dwarfs. The X-ray pulsar 1E 2259 + 586 may be such a white dwarf. It is shown that in this case starquakes may be responsible for the decrease of the mean spin-down rate which was observed for 1E 2259 + 586 between 1987 and 1990.
openaire   +2 more sources

Rapid Spectral Evolution of SGR 1935+2154 during Its 2022 Outburst

The Astrophysical Journal
During the 2022 outburst of SGR 1935+2154, a fast radio burst (FRB)-like event (FRB 20221014A) and X-ray activities occurred between two spin-up glitches, suggesting these glitches may connect to multiwavelength phenomenology.
Chin-Ping Hu, Zorawar Wadiasingh, Wynn C. G. Ho, Matthew G. Baring, George A. Younes, Teruaki Enoto, Sebastien Guillot, Tolga Güver, Marlon L. Bause, Rachael Stewart, Alex Van Kooten, Chryssa Kouveliotou   +11 more
doaj   +1 more source