Results 131 to 140 of about 6,025 (156)
Some of the next articles are maybe not open access.
Interstellar scintillation: observational highlights
Astronomical and Astrophysical Transactions, 2007This paper reviews the chief observational phenomena that define interstellar scintillation (ISS) and have given evidence for a widespread distribution of plasma turbulence on very small scales. Though ISS was discovered in pulsars and is still a major perturbation of their signals, it is now also recognized in a variety of fluctuations in the flux ...
B J Rickett
exaly +2 more sources
Interstellar scintillation and pulsar velocities
Nature, 1982Interstellar scintillation of the intensity of pulsar radio signals is known to be the effect of diffraction in random irregularities in electron density, with typical scales of 1013 cm and density fluctuations of typically 3×10−4 cm−3. The observed fading pattern is believed to be due to the combined motion of the pulsar and the observer relative to ...
F G Smith
exaly +2 more sources
Review of theory of interplanetary and interstellar scintillation
Astronomical and Astrophysical Transactions, 2007Basic theoretical methods and solutions describing radio wave propagation in the turbulent plasma are briefly reviewed. Consideration is given to the results on scattering effects such as angular scattering, pulse broadening and spectral line spread. Also treated are phase and frequency fluctuations.
V I Shishov
exaly +2 more sources
Interstellar Scattering and Scintillation of Radio Waves
Annual Review of Astronomy and Astrophysics, 1977A review is presented of interstellar scattering and scintillation observations in the light of modern theory for extended, spatially homogeneous, power law inhomogenieties. Formulas are presented for the experimentally observable quantities and are compared with data. A general discussion of the model is given. (GHT)
Barney J Rickett
exaly +2 more sources
Scintillations and Interstellar Lévy Flights
Astrophysics and Space Science, 2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Boldyrev, Stanislav, Gwinn, Carl R.
openaire +1 more source
Interstellar scintillations of binary pulsars
AIP Conference Proceedings, 1988We have measured interstellar scintillations of two binary pulsars (1855+09 and 1913+16) to determine their transverse velocities at numerous points in their orbits. Combining transverse velocities with radial velocities derived from Doppler shifts, one can (in principle) determine a binary system’s proper motion and orbital inclination, and the bulk ...
R. J. Dewey +3 more
openaire +1 more source
Pulsars and Interstellar Scintillations
International Astronomical Union Colloquium, 2000Abstract In this paper, I review our current understanding of interstellar scintillations (ISS) of pulsars. The emphasis is on new results that have appeared during the last five years. The topics covered include (i) review of the understanding of refractive ISS (ii) the shape of the spectrum of electron density fluctuations in the interstellar ...
openaire +1 more source
Scintillation as a tool for studying the interstellar plasma
Radiophysics and Quantum Electronics, 1994The interstellar plasma is characterized by variations of electron density having a wide range of physical scales. Radiation propagating through this inhomogeneous plasma is scattered, causing the received intensity to scintillate on a variety of time scales.
openaire +1 more source
Observations of diffractive interstellar scintillation phenomena
AIP Conference Proceedings, 1988Recent observations of radio source angular broadening and pulsar dynamic spectra are reviewed, with the goal of determining the spectrum of the interstellar density irregularities and the sources which generate the turbulence. Measurements of angular broadening and certain aspects of pulsar dynamic spectra favor ‘‘quasi‐Kolmogoroff’’ density spectra ...
openaire +1 more source
Pulsar scintillation and the local interstellar medium
2000Ever since their discovery, pulsars have been proved to be excellent tools to study the Interstellar Medium. Results from new observations using the Ooty Radio Telescope at 327 MHz are used to investigate the properties of the Local Interstellar Medium; in particular, the distribution of radio wave scattering material and the spatial power spectrum of ...
openaire +1 more source