Results 131 to 140 of about 1,203,998 (246)

The Spheroidal Analog Method for Modeling Irregular Porous Aggregates

The Astrophysical Journal
It is shown that the optical properties of an irregular porous grain with effective radius a _eff  ≲ 3 λ (where λ is the wavelength) can be well approximated by a “spheroidal analog”: a spheroid with appropriate axial ratio and size, with a dielectric ...
B. T. Draine
doaj   +1 more source

Observations of interstellar scattering of six pulsars using Polish LOFAR station PL611 [PDF]

We present the preliminary results of 4 yr of observations of the scattering of pulsar radiation in the interstellar medium using the Low Frequency Array (LOFAR) PL611 station located in Lazy near Krakow.
Chyży, Krzysztof, Lewandowski, Wojciech, Kijak, Jarosław, Błaszkiewicz, Leszek, Filothodoros, Alexandros, Krankowski, Andrzej, Śmierciak, Bartosz   +6 more
core   +2 more sources

Interstellar Scatter [PDF]

Nature, 1973
openaire   +1 more source

Scintillation Bandwidth Measurements from 23 Pulsars from the AO327 Survey

The Astrophysical Journal
A 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, Grayce C. Brown, Jackson MacTaggart, Thomas Nguyen, William D. Fletcher, Brenda L. Jones, Emma Koller, Veronica Petrus, Katie F. Pighini, Gray Rosario, Vincent A. Smedile, Adam T. Stone, Shawn You, Maura A. McLaughlin, Jacob E. Turner, Julia S. Deneva, Michael T. Lam, Brent J. Shapiro-Albert   +17 more
doaj   +1 more source

Simulation of Interstellar Scattering of Pulsar Signals [PDF]

, 2018
I spent the last year simulating the distribution of material in the interstellar medium as a combination of two components, namely a random scattering component in the form of a continuous cloud of material, and coherent sheets of material that cause an
Jussila, Adam
core  

An Anisotropic Plasma Model of the Heliospheric Interface

The Astrophysical Journal
We present a pioneering model of the interaction between the solar wind and the surrounding interstellar medium that includes the possibility of different pressures in directions parallel and perpendicular to the magnetic field.
Vladimir Florinski, Dinshaw S. Balsara, Deepak Bhoriya, Gary P. Zank, Shishir Biswas, Swati Sharma, Sethupathy Subramanian   +6 more
doaj   +1 more source

The Angular Broadening of Radio Sources by Scattering in the Interstellar Medium [PDF]

, 1976
The variation with direction of interstellar scattering at 81·5 MHz has been determined by two independent methods based on interplanetary scintillation measurements at 151·5 MHz, presented here, and at 81·5 MHz, already published.
Duffett-Smith, P. J., Readhead, A. C. S.
core  

Interstellar grain mantles [PDF]

, 1986
Interstellar molecular grain mantles are an important component of the interstellar dust inside dense molecular clouds as evidenced by the detection of absorption bands at 2.97, 3.08, 4.61, 6.0 and 6.8 microns.
Witteborn, F. C., Bregman, J., Tielens, Alexander G. G. M., Allamandola, Louis J.   +3 more
core   +1 more source

Direct Very Long Baseline Interferometry Detection of Interstellar Turbulence Imprint on a Quasar: TXS 2005+403

The Astrophysical Journal Letters
We report the first unambiguous detection of refractive substructure in an active galactic nucleus (AGN) using ground-based very long baseline interferometry (VLBI).
A. V. Plavin, A. B. Pushkarev, Y. Y. Kovalev   +2 more
doaj   +1 more source

Modeling the Optical Colors of Galactic Cirrus Clouds in the Stripe 82 Region

The Astronomical Journal
Observations have shown that the optical colors of Galactic cirrus clouds differ significantly from those of extragalactic sources; thus, they can be used to distinguish Galactic cirrus from extragalactic low surface brightness (LSB) features.
Kwang-Il Seon, Jongwan Ko, Woowon Byun, Jaehyun Lee, Young-Soo Jo   +4 more
doaj   +1 more source