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Related papers: Arecibo Multi-frequency IPS Observations: Solar Wi…

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The anisotropic nature of solar wind magnetic turbulence fluctuations is investigated scale-by-scale using high cadence in-situ magnetic field measurements from the Cluster and ACE spacecraft missions. The data span five decades in scales…

The fraction of compact active galactic nuclei (AGNs) that exhibit interstellar scintillation (ISS) at radio wavelengths, as well as their scintillation amplitudes, have been found to decrease significantly for sources at redshifts z > 2.…

Cosmology and Nongalactic Astrophysics · Physics 2012-08-14 J. Y. Koay , J. -P. Macquart , B. J. Rickett , H. E. Bignall , D. L. Jauncey , T. Pursimo , C. Reynolds , J. E. J. Lovell , L. Kedziora-Chudczer , R. Ojha

We investigated the behavior of the spectral slope of interplanetary magnetic field fluctuations at proton scales for selected high resolution time intervals from WIND and MESSENGER spacecraft at $1$ AU and $0.56$ AU, respectively. The…

Solar and Stellar Astrophysics · Physics 2015-06-22 R. Bruno , L. Trenchi , D. Telloni

We present interstellar scintillation velocity measurements for four millisecond pulsars obtained from long-term monitoring observations with the Arecibo radio telescope at 430 MHz. We also derive explicit expressions that relate the…

In-situ observations of magnetic field fluctuations in the solar wind show a broad continuum in the power spectral density (PSD) with a power-law range of scaling often identified as an inertial range of magnetohydrodynamic turbulence.…

Space Physics · Physics 2012-10-08 A. J. Turner , S. C. Chapman , G. Gogoberidze

Context. Interstellar scintillation (ISS) of pulsar emission can be used both as a probe of the ionised interstellar medium (IISM) and cause corruptions in pulsar timing experiments. Of particular interest are so-called scintillation arcs…

We use dual-site radio observations of interplanetary scintillation (IPS) with extremely long baselines (ELB) to examine meridional flow characteristics of the ambient fast solar wind at plane-of-sky heliocentric distances of 24-85 solar…

Solar and Stellar Astrophysics · Physics 2015-06-05 Gareth Dorrian , Andy Breen , Richard Fallows , Mario Bisi

Refractive scintillation effects are powerful techniques for discriminating between different models proposed for the electron density fluctuation spectrum in the ISM. Data from our long-term scintillation study of 18 pulsars in the DM…

Astrophysics · Physics 2009-10-31 N. D. Ramesh Bhat , Yashwant Gupta , A. Pramesh Rao

We present measurements of the auto- and cross-frequency power spectra of the cosmic infrared background (CIB) at 250, 350, and 500um (1200, 860, and 600 GHz) from observations totaling ~ 70 deg^2 made with the SPIRE instrument aboard the…

We outline a method of deriving one-dimensional phaseless visibility along solar wind direction from interplanetary scintillation power spectrum, together with the known visibility of a calibration source. The method is illustrated briefly.…

Earth and Planetary Astrophysics · Physics 2009-03-05 V R Venugopal , P K Manoharan , D G Banhatti , S Edwin Jayaraj

Solar-wind 3-D reconstruction tomography based on interplanetary scintillation (IPS) studies provides fundamental information for space-weather forecasting models, and gives the possibility to determine heliospheric column densities. Here…

Solar and Stellar Astrophysics · Physics 2023-06-14 C. Tiburzi , B. V. Jackson , L. Cota , G. M. Shaifullah , R. A. Fallows , M. Tokumaru , P. Zucca

We report on the simultaneous Giant Metrewave Radio Telescope (GMRT) and Algonquin Radio Observatory (ARO) observations at 550-750 MHz of the scintillation of PSR B1508+55, resulting in a $\sim$10,000-km baseline. This regime of measurement…

High Energy Astrophysical Phenomena · Physics 2021-08-18 V. R. Marthi , D. Simard , R. A. Main , U. -L. Pen , M. H. van Kerkwijk , K. Vanderlinde , Y. Gupta , C. Roberts , B. M. Quine

The effect of interplanetary plasma on pulsed pulsar radiation passing through is considered. The pulses of two rotating radio transients (J0609+16, J1132+25) and a pulsar (B0320+39) detected on the Large Phased Array (Pushchino…

High Energy Astrophysical Phenomena · Physics 2023-05-24 S. A. Tyul'bashev , I. V. Chashei , M. A. Kitaeva

The analysis of variations in the emission intensity of the pulsar B0950+08 from 2014 to 2022 with scales from minutes to years was carried out. The observations were obtained in a round-the-clock daily survey conducted on the Large Phased…

High Energy Astrophysical Phenomena · Physics 2025-03-19 T. V. Smirnova , M. O. Toropov , S. A. Tyul'bashev

The remarkable rapid variations in radio flux density and polarization of the quasar PKS 0405-385 observed in 1996 are subject to a correlation analysis, from which characteristic time scales and amplitudes are derived. The variations are…

Astrophysics · Physics 2009-11-07 Barney J. Rickett , Lucyna Kedziora-Chudczer , David L. Jauncey

The interstellar medium hosts a population of scattering screens, most of unknown origin. Scintillation studies of pulsars provides a sensitive tool for resolving these scattering screens and a means of measuring their properties. In this…

High Energy Astrophysical Phenomena · Physics 2022-03-14 James W. McKee , Hengrui Zhu , Daniel R. Stinebring , James M. Cordes

We present a measurement of the spectral index of density fluctuations between ion and electron scales in solar wind turbulence using the EFI instrument on the ARTEMIS spacecraft. The mean spectral index at 1 AU was found to be -2.75 +/-…

Space Physics · Physics 2012-07-17 C. H. K. Chen , C. S. Salem , J. W. Bonnell , F. S. Mozer , S. D. Bale

Understanding the mechanism(s) of the solar wind acceleration is important in astrophysics and geophysics. A promising model of the solar wind acceleration is known as the wave/turbulence-driven (WTD) model, in which Alfv\'en waves feed…

Solar and Stellar Astrophysics · Physics 2022-04-13 Munehito Shoda , Kazumasa Iwai , Daikou Shiota

Interstellar scintillation (ISS) has been established as the cause of the random variations seen at centimetre wavelengths in many compact radio sources on timescales of a day or less. Observations of ISS can be used to probe structure both…

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