Results 51 to 60 of about 1,203,998 (246)
Turbulence Driving by Interstellar Pickup Ions in the Outer Solar Wind
The Astrophysical Journal, 2023 We revisit the question of how the unstable scattering of interstellar pickup ions (PUIs) may drive turbulence in the outer solar wind and why the energy released into fluctuations by this scattering appears to be significantly less than the standard ...
Philip A. Isenberg +2 more
doaj +1 more source
High Radiation Pressure on Interstellar Dust Computed by Light-scattering Simulation on Fluffy Agglomerates of Magnesium-silicate Grains with Metallic-iron Inclusions [PDF]
, 2017 Recent space missions have provided information on the physical and chemical properties of interstellar grains such as the ratio β of radiation pressure to gravity acting on the grains in addition to the composition, structure, and size distribution of ...
H. Kimura
semanticscholar +1 more source
The Astrophysical Journal, 2023 Interstellar neutral (ISN) helium atoms penetrating the heliosphere are used to find the flow velocity and temperature of the very local interstellar medium near the heliosphere.
P. Swaczyna +3 more
doaj +1 more source
Interstellar Scattering: Observations and Interpretations [PDF]
International Astronomical Union Colloquium, 1996 Abstract The successful theory for radio propagation through the interstellar plasma is reviewed, where the density spectrum follows the Kolmogorov model. However, there are also several observations indicating more refraction than expected. A particular model of enhanced refraction is proposed in which isolated regions of the warm ionized medium ...
openaire +1 more source
Speckles in Interstellar Radio-Wave Scattering [PDF]
International Astronomical Union Colloquium, 1991 AbstractObservations of speckles in the scattering disk of the Vela pulsar are presented and speckle techniques for studying and circumventing scattering of radio waves by the turbulent interstellar plasma are discussed. The speckle pattern contains, in a hologrammatic fashion, complete information on the structure of the radio source as well as the ...
K. M. Desai +8 more
openaire +1 more source
The Power of the Rings: The GRB 221009A Soft X-Ray Emission from Its Dust-scattering Halo
The Astrophysical Journal Letters, 2023 GRB 221009A is the brightest gamma-ray burst (GRB) ever detected that has occurred at low Galactic latitude. Owing to this exceptional combination, its prompt X-ray emission could be detected for weeks in the form of expanding X-ray rings produced by ...
Andrea Tiengo +13 more
doaj +1 more source
On Distinguishing Interstellar Objects Like ‘Oumuamua From Products of Solar System Scattering [PDF]
, 2017 Schneider (2018) explored the possibility that 'Oumuamua is a Solar System object, and concluded that if it is, it must have been scattered by "another, yet unknown planet." I provide an extremely conservative upper limit on post-scattering velocities in
J. Wright
semanticscholar +1 more source
Astrophysical Journal, 2019 The leading hypothesis for the origin of the Interstellar Boundary Explorer(IBEX) “ribbon” of enhanced energetic neutral atoms (ENAs) from the outer heliosphere is the secondary ENA mechanism, whereby neutralized solar wind ions escape the heliosphere ...
E. Zirnstein +5 more
semanticscholar +1 more source
The practical application of fractal dimension in water treatment practice-the impact of polymer dosing [PDF]
, 2008 The application of floc fractal dimension has been investigated in this work to determine if this parameter can have operational significance in water treatment.
Jefferson, Bruce +4 more
core +1 more source
Measurements of Interstellar Scattering in the Cygnus Region [PDF]
Symposium - International Astronomical Union, 1988 We report progress on a study of interstellar scattering in the direction of the constellation Cygnus. A high quality, 1663 MHz VLBI image has been obtained of the radio source 2013+370, whose structure at this frequency is dominated by scattering. The visibility function indicates that the spectral index of the interstellar density irregularities is ...
S. Spangler, A. Fey, R. Mutel
openaire +1 more source