Results 101 to 110 of about 6,025 (156)
Odessa Astronomical Publications, 2016 On the Pushchino Radio Astronomy Observatory of Lebedev Physical Institute by radio telescope BSA (Big Scanning Antenna) in 2012 started daily multi-beam observations at the frequency range 109- 112 MHz.
V. A. Samodurov +6 more
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Identifying Pulsar Candidates in Interferometric Radio Images Using Scintillation
The Astrophysical JournalPulsars have been primarily detected by their narrow pulses or periodicity in time domain data. Interferometric surveys for pulsars are challenging due to the trade-off between beam sensitivity and beam size and the corresponding tradeoff between survey ...
Jitendra Salal +2 more
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Turbulence in nearly incompressible fluids: density spectrum, flows, correlations and implication to the interstellar medium [PDF]
Nonlinear Processes in Geophysics, 2005 Interstellar scintillation and angular radio wave broadening measurements show that interstellar and solar wind (electron) density fluctuations exhibit a Kolmogorov-like k-5/3 power spectrum extending over many decades in wavenumber space.
S. Dastgeer, G. P. Zank
doaj
Diffractive Interstellar Scintillation Timescales and Velocities
The Astrophysical Journal, 1998 We derive general relationships between the observed timescale of diffractive interstellar scintillations and the physical velocities of the observer, the source, and the scattering medium. Our treatment applies exclusively to saturated scintillations of point sources in the strong scattering regime.
J. M. Cordes, B. J. Rickett
openaire +1 more source
Scintillation Velocity and Arc Observations of FRB 20201124A
The Astrophysical Journal LettersWe present the scintillation velocity measurements of FRB 20201124A from the Five-hundred-meter Aperture Spherical radio Telescope observations, which reveal an annual variation.
Ziwei Wu +21 more
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A 450-day light curve of the radio afterglow of GRB 970508: Fireball calorimetry
, 1999 We report on the results of an extensive monitoring campaign of the radio afterglow of GRB 970508, lasting 450 days after the burst. The spectral and temporal radio behavior indicate that the fireball has undergone a transition to sub-relativistic ...
Bremer M. +9 more
core +3 more sources
Interstellar Scintillations and Neutron Star Kinematics [PDF]
Symposium - International Astronomical Union, 1987 The interstellar scintillation technique for measuring neutron star speeds is described and results are given for 71 radio pulsars. The mean transverse neutron star speed is 100 km s−1 and the distribution extends to 300 km s−1. The transverse speed correlates with the z velocity derived independently using distance from the galactic plane, consistent ...
openaire +1 more source
A Statistical Analysis of Crab Pulsar Giant Pulse Rates
The Astrophysical JournalA small number of pulsars are known to emit giant pulses (GPs), single pulses much brighter than average. Among these is PSR J0534+2200, also known as the Crab pulsar, a young pulsar with high GP rates. Long-term monitoring of the Crab pulsar presents an
Graham M. Doskoch +20 more
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Scintillation Bandwidth Measurements from 23 Pulsars from the AO327 Survey
The Astrophysical JournalA pulsar’s scintillation bandwidth is inversely proportional to the scattering delay, making accurate measurements of scintillation bandwidth critical to characterize unmitigated delays in efforts to measure low-frequency gravitational waves with pulsar ...
Sofia Sheikh +17 more
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The Astronomical JournalThe search for extraterrestrial intelligence at radio frequencies has focused on spatial filtering as a primary discriminant from terrestrial interference.
Bryan Brzycki +9 more
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