Results 1 to 10 of about 4,666 (149)

Chaos in magnetospheric radio emissions [PDF]

Nonlinear Processes in Geophysics, 2002
A three-wave model of auroral radio emissions near the electron plasma frequency was proposed by Chian et al. (1994) involving resonant interactions of Langmuir, whistler and Alfvén waves. Chaos can occur in the nonlinear evolution of this three-wave
A. C.-L. Chian, A. C.-L. Chian, E. L. Rempel, E. L. Rempel, F. A. Borotto, F. A. Borotto, F. A. Borotto   +6 more
doaj   +8 more sources

In situ and remote observations of the ultraviolet footprint of the moon Callisto by the Juno spacecraft [PDF]

Nature Communications
Jupiter exhibits peculiar multiwavelength auroral emissions resulting from the electromagnetic interactions of Io, Europa, and Ganymede with the magnetospheric plasma flow. Characterizing the faint auroral footprint of the fourth Galilean moon, Callisto,
J. Rabia, V. Hue, C. K. Louis, N. André, Q. Nénon, J. R. Szalay, R. Prangé, L. Lamy, P. Zarka, B. Collet, F. Allegrini, R. W. Ebert, T. K. Greathouse, B. Bonfond, G. R. Gladstone, A. H. Sulaiman, W. S. Kurth, J. E. P. Connerney, P. Louarn, E. Penou, A. Kamran, D. Santos-Costa, R. S. Giles, J. A. Kammer, M. H. Versteeg, S. J. Bolton   +25 more
doaj   +2 more sources

Radio emissions reveal Alfvénic activity and electron acceleration prior to substorm onset [PDF]

Nature Communications
Magnetospheric substorms are among the most dynamic phenomena in the Earth’s magnetosphere, yet their triggering mechanisms remain unclear. Ground-based observations have identified wave-like aurora as precursors to substorms.
S. Y. Wu, D. K. Whiter, L. Lamy, M. M. Wang, P. Zarka, C. M. Jackman, S. Y. Ye, J. E. Waters, A. R. Fogg, S. B. Mende, N. Kaweeyanun, Y. Kasaba, S. Kurita, H. Kojima, L. J. Paxton, Y. Kasahara, Y. Miyoshi, A. Shinbori, F. Tsuchiya   +18 more
doaj   +2 more sources

ROME. IV. An Arecibo Search for Substellar Magnetospheric Radio Emissions in Purported Exoplanet-hosting Systems at 5 GHz

The Astrophysical Journal
Plasma flow–obstacle interactions, such as those between an exoplanet’s magnetosphere and the host star’s stellar wind, may lead to detectable radio emissions.
Matthew Route
doaj   +2 more sources

Quantification of magnetosphere–ionosphere coupling timescales using mutual information: response of terrestrial radio emissions and ionospheric–magnetospheric currents [PDF]

Nonlinear Processes in Geophysics
Auroral kilometric radiation (AKR) is a terrestrial radio emission excited by the same accelerated electrons which excite auroral emissions. Although it is well correlated with auroral and geomagnetic activity, the coupling timescales between AKR and ...
A. R. Fogg, C. M. Jackman, S. C. Chapman, S. C. Chapman, S. C. Chapman, J. E. Waters, A. Bergin, L. Lamy, L. Lamy, K. Issautier, B. Cecconi, X. Bonnin   +11 more
doaj   +3 more sources

Periodic Radio Emission from the T8 Dwarf WISE J062309.94–045624.6

The Astrophysical Journal Letters, 2023
We present the detection of rotationally modulated, circularly polarized radio emission from the T8 brown dwarf WISE J062309.94−045624.6 between 0.9 and 2.0 GHz.
Kovi Rose, Joshua Pritchard, Tara Murphy, Manisha Caleb, Dougal Dobie, Laura Driessen, Stefan W. Duchesne, David L. Kaplan, Emil Lenc, Ziteng Wang   +9 more
doaj   +1 more source

MAVEN Observations of Whistler-mode Waves Within the Magnetic Dips in the Martian Ionopause/Ionosphere

The Astronomical Journal, 2023
Whistler-mode waves are natural and common electromagnetic emissions observed both surrounding planets and their moons with and without intrinsic magnetic field.
Jing Wang, Jiang Yu, Zuzheng Chen, Xiaojun Xu, Kun Li, Jun Cui, Jinbin Cao   +6 more
doaj   +1 more source

A model of so-called "Zebra" emissions in solar flare radio burst continua [PDF]

Annales Geophysicae, 2011
A simple mechanism for the generation of electromagnetic "Zebra" pattern emissions is proposed. "Zebra" bursts are regularly spaced narrow-band radio emissions on the otherwise broadband radio continuum emitted by the active solar corona.
R. A. Treumann, R. A. Treumann, R. A. Treumann, R. Nakamura, W. Baumjohann   +4 more
doaj   +1 more source

Modulation of NTC frequencies by Pc5 ULF pulsations : experimental test of the generation mechanism and magnetoseismology of the emitting surface [PDF]

, 2009
Nonthermal continuum (NTC) radiation is believed to be emitted by the conversion of an electrostatic wave into an electromagnetic one, which takes place at the Earth's magnetic equator.
Anderson, Balogh, Bernstein, C. Foullon, Calvert, Canu, Cheng, Christiansen, Denton, Décréau, Décréau, Décréau, Engebretson, Eriksson, Etcheto, G. Le Rouzic, Gough, Gough, Gurnett, Gurnett, Gustafsson, Hudson, Hughes, Kasaba, Kennel, Kurth, Kurth, Loewe, Loto'Aniu, Mager, Mann, Melrose, Morgan, Oya, P. M. E. Décréau, Pierrard, Rönnmark, S. Grimald, Schäfer, Singer, Takahashi, Tsyganenko, X. Suraud, X. Vallières   +43 more
core   +3 more sources

Probing discrete auroral arcs by ionospheric tomography [PDF]

Annales Geophysicae, 1998
Optical observations of 557.7 nm and 630.0 nm emissions from discrete auroral arcs in the post-noon sector have been related to localised field-aligned enhancements in the spatial distribution of E- and F-layer electron density respectively seen in ...
J. Moen, S. T. Berry, L. Kersley, B. Lybekk   +3 more
doaj   +1 more source