Results 91 to 100 of about 120,893 (256)
Temporal clustering of rotational glitches in the Crab pulsar [PDF]
Monthly notices of the Royal Astronomical Society, 2018 It is an open question whether glitch activity in individual pulsars varies on decadal time-scales. The Crab pulsar has experienced 23 spin-up glitches in the last 36 years, interrupting an otherwise monotonic deceleration. A homogeneous Poisson process,
J. Carlin, A. Melatos, Damjan Vukcevic
semanticscholar +1 more source
Pulsar and Magnetar Navigation with Fermi/GBM and GECAM
The Astrophysical Journal Supplement Series, 2023 The determination of the absolute and relative position of a spacecraft is critical for its operation, observations, data analysis, scientific studies, as well as deep-space exploration in general.
Xi-Hong Luo +31 more
doaj +1 more source
The Astrophysical JournalIt was previously believed that the long-term persistent increase in the spin-down rate of the Crab pulsar following a glitch is direct evidence of a starquake-induced glitch or at least related to a starquake.
Xiao-Ping Zheng +4 more
doaj +1 more source
A Spatially Resolved X-Ray Polarization Map of the Vela Pulsar Wind Nebula
The Astrophysical Journal Letters, 2023 In this paper, we present a full spatially resolved polarization map for the Vela pulsar wind nebula (PWN) observed by IXPE. By employing effective background discrimination techniques, our results show a remarkably high degree of local polarization in ...
Kuan Liu +14 more
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The Polarization of the Crab Pulsar with HST [PDF]
International Astronomical Union Colloquium, 1996 The linear polarization of the Crab pulsar as a function of pulse phase was observed by the High Speed Photometer on the Hubble Space Telescope in March, 1993. Observations were obtained in a bandpass centered on 2770 A using a 0.25 ms sample time, corresponding to a time resolution of 0.0075 in pulse phase. The UV polarization of the pulsar [Fig.
Francis Graham-Smith +8 more
openaire +1 more source
How massive are the superfluid cores in the Crab and Vela pulsars and why their glitch-events are accompanied with under and overshootings? [PDF]
, 2020 The Crab and Vela are well-studied glitching pulsars and the data obtained sofar should enable us to test the reliability of models of their internal structures. Very recently it was proposed that glitching pulsars are embedded in bimetric spacetime: their incompressible superfluid cores (SuSu-cores) are embedded in flat spacetime, whereas the ambient ...
arxiv +1 more source
Crab Pulsar Radiation Characteristics [PDF]
Symposium - International Astronomical Union, 1971 It has been suggested that for the Crab pulsar the radio radiation mechanism may be different from that in other pulsars. The principal observations leading to this suggestion are, firstly, the essentially constant position angle of the highly linearly polarised precursor, and secondly, the occasional large increases in intensity of the main pulse.
openaire +2 more sources
High-sensitivity Beamformed Observations of the Crab Pulsar's Radio Emission
The Astrophysical Journal, 2023 We analyzed four epochs of beamformed European VLBI Network data of the Crab Pulsar at 1658.49 MHz. With the high sensitivity resulting from resolving out the Crab Nebula, we are able to detect even the faint high-frequency components in the folded ...
Rebecca Lin, Marten H. van Kerkwijk
doaj +1 more source
Giant pulses of pulsar radio emission [PDF]
Astrophys.SpaceSci.308:563-567,2007, 2007 Review report of giant pulses of pulsar radio emission, based on our detections of four new pulsars with giant pulses, and the comparative analysis of the previously known pulsars with giant pulses, including the Crab pulsar and millisecond pulsar PSR B1937+21.
arxiv +1 more source
Minimum glitch of the Crab pulsar and the crustquake as a trigger mechanism [PDF]
, 2017 We discuss the minimum glitch size of Crab observed by Espinoza et al. (2014). Modelling the crustquake as a trigger mechanism we estimate the size of the broken plate. The plate size obtained, D $\sim 100 m$ is comparable to plate size estimates for PSR
O. Akbal, M. Alpar
semanticscholar +1 more source