Results 101 to 110 of about 39,097 (209)

The interplanetary hydrogen and helium glow and the inferred interstellar gas properties [PDF]

open access: yes, 1983
Observations of the interplanetary hydrogen and helium glow have been obtained by a number of spacecraft and rocket experiments during the past fifteen years.
Judge, D. L.
core   +1 more source

Diffuse Galactic light at high Galactic latitude: nature and interpretation

open access: yes, 2007
The hypothesis of an extended red emission (ERE) in diffuse Galactic light (DGL) has been put forward in 1998 by Gordon, Witt and Friedmann who found that scattered starlight was not enough to explain the amount of DGL in the R band, in some high ...
Boulanger   +34 more
core   +1 more source

The Spectropolarimetric Evolution of V838 Monocerotis [PDF]

open access: yes, 2006
I review photo-polarimetric and spectropolarimetric observations of V838 Mon, which revealed that it had an asymmetrical inner circumstellar envelope following its 2nd photometric outburst.
Wisniewski, John P.
core   +2 more sources

Optical properties of cosmic dust analogs: A review

open access: yes, 2010
Nanometer- and micrometer-sized solid particles play an important role in the evolutionary cycle of stars and interstellar matter. The optical properties of cosmic grains determine the interaction of the radiation field with the solids, thereby ...
Henning, Thomas, Mutschke, Harald
core   +1 more source

Precise Measurements of TeV Halos around Geminga and Monogem Pulsars with HAWC

open access: yesThe Astrophysical Journal
We present the most precise measurements to date for the spatial extension and energy spectrum of the γ -ray region between a pulsar’s wind nebula and the interstellar medium, better known as the halo, present around Geminga and PSR B0656+14 (Monogem ...
A. Albert   +94 more
doaj   +1 more source

Circumstellar dust [PDF]

open access: yes
The presence of dust in the general interstellar medium is inferred from the extinction, polarization, and scattering of starlight; the presence of dark nebulae; interstellar depletions; the observed infrared emission around certain stars and various ...
Dwek, E.
core   +1 more source

Pulsar scintillation studies with LOFAR

open access: yesAstronomy & Astrophysics
Context. The interstellar scintillation observed in radio pulsars arises from interference between electromagnetic waves scattered by electron density fluctuations in the turbulent interstellar plasma, providing a critical tool for probing the small ...
Cai Yanqing   +29 more
doaj   +1 more source

Transient Blurring of the Scintillation Arc of Pulsar B1737+13

open access: yesThe Astrophysical Journal
For many pulsars, the scattering structures responsible for scintillation are typically dominated by a single, thin screen along the line of sight, which persists for years or decades.
Yen-Hua Chen   +4 more
doaj   +1 more source

Scintillation in the Circinus Galaxy water megamasers

open access: yes, 2004
We present observations of the 22 GHz water vapor megamasers in the Circinus galaxy made with the Tidbinbilla 70m telescope. These observations confirm the rapid variability seen earlier by Greenhill et al (1997).
David L. Jauncey   +6 more
core   +1 more source

Interstellar Turbulence II: Implications and Effects

open access: yes, 2004
Interstellar turbulence has implications for the dispersal and mixing of the elements, cloud chemistry, cosmic ray scattering, and radio wave propagation through the ionized medium.
Achterberg A   +54 more
core   +2 more sources

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