Results 41 to 50 of about 1,203,998 (246)

The intra-hour variable quasar J1819+3845: 13-year evolution, jet polarization structure, and interstellar scattering screen properties [PDF]

open access: yes, 2014
We examine the long-term evolution of the intra-hour variable quasar, J1819+3845, whose variations have been attributed to interstellar scintillation by extremely local turbulent plasma, located only 1-3 pc from Earth.
A. Bruyn, J. Macquart
semanticscholar   +1 more source

Heating of the low-latitude solar wind by dissipation of turbulent magnetic fluctuations [PDF]

open access: yes, 2001
We test a theory presented previously to account for the turbulent transport of magnetic fluctuation energy in the solar wind and the related dissipation and heating of the ambient ion population. This theory accounts for the injection of magnetic energy
Matthaeus, William H.   +5 more
core   +1 more source

TIMING AND INTERSTELLAR SCATTERING OF 35 DISTANT PULSARS DISCOVERED IN THE PALFA SURVEY [PDF]

open access: yes, 2013
We have made extensive observations of 35 distant slow (non-recycled) pulsars discovered in the ongoing Arecibo PALFA pulsar survey. Timing observations of these pulsars over several years at Arecibo Observatory and Jodrell Bank Observatory have yielded ...
D. Nice   +44 more
semanticscholar   +1 more source

Electronic spectroscopy of cold cations in a 22-pole trap by indirect methods [PDF]

open access: yes, 2013
The confining capabilities of a 22-pole ion trap have been employed to mea- sure electronic spectra of cations of astrophysical relevance. The ion trap sits on the head of a closed cycle cryostat, enabling collisional cooling of the confined ions with
Chakrabarty, Satrajit
core   +1 more source

A new analytical scattering phase function for interstellar dust [PDF]

open access: yes, 2022
Context. Properly modelling scattering by interstellar dust grains requires a good characterisation of the scattering phase function. The Henyey-Greenstein phase function has become the standard for describing anisotropic scattering by dust grains, but ...
Camps, Peter   +5 more
core   +1 more source

A Comprehensive Model of Morphologically Realistic Cosmic Dust Particles: An Application to Mimic the Unusual Polarization Properties of the Interstellar Comet 2I/Borisov

open access: yesThe Astrophysical Journal, 2023
The cosmic dust particles found in space are mainly porous aggregates of smaller grains. Theoretically, these aggregates are replicated using fractal geometry, assuming a cluster of spheres.
Prithish Halder, Sujan Sengupta
doaj   +1 more source

Exponential profiles from stellar scattering off of interstellar clumps and holes in dwarf galaxy discs [PDF]

open access: yes, 2017
Holes and clumps in the interstellar gas of dwarf irregular galaxies are gravitational scattering centers that heat field stars and change their radial and vertical distributions.
C. Struck, B. Elmegreen
semanticscholar   +1 more source

Diagnostics from Polarization of Scattered Optical Light from Galactic Infrared Cirrus

open access: yesThe Astrophysical Journal, 2023
We propose polarization of scattered optical light from intermediate Galactic latitude infrared cirrus as a new diagnostic to constrain models of interstellar dust and the anisotropic interstellar radiation field (aISRF).
Shannon K. Bowes, Peter G. Martin
doaj   +1 more source

Probing the interstellar dust towards the Galactic Centre: dust-scattering halo around AX J1745.6−2901 [PDF]

open access: yes, 2017
AX J1745.6-2901 is an X-ray binary located at only 1.45 arcmin from Sgr A*, showcasing a strong X-ray dust scattering halo. We combine Chandra and XMM-Newton observations to study the halo around this X-ray binary.
C. Jin   +3 more
semanticscholar   +1 more source

Characterizing & Mitigating Interstellar Scattering in Radio Observations of Pulsars [PDF]

open access: yes, 2023
Pulsars are rapidly rotating neutron stars that emit concentrated beams of radiation from their magnetic poles. Measuring the arrival of these pulses via pulsar timing is a powerful tool in efforts to detect low frequency gravitational waves (GWs ...
Turner, Jacob E
core   +1 more source

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