Results 1 to 10 of about 4,668 (165)

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   +11 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

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

Nonlinear Processes in Geophysics, 2023
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   +7 more sources

Radio Emission and Electric Gaps in Pulsar Magnetospheres

The Astrophysical Journal Letters, 2023
Abstract The origin of pulsar radio emission is one of the old puzzles in theoretical astrophysics. In this Letter, we present a global kinetic plasma simulation that shows from first principles how and where radio emission can be produced in pulsar magnetospheres.
Ashley Bransgrove, Andrei M. Beloborodov, Yuri Levin   +2 more
openaire   +4 more sources

Radio emission in Mercury magnetosphere [PDF]

Astronomy & Astrophysics, 2016
Context: Active stars possess magnetized wind that has a direct impact on planets that can lead to radio emission. Mercury is a good test case to study the effect of the solar wind and interplanetary magnetic field on radio emission driven in the planet magnetosphere. Such studies could be used as proxies to characterize the magnetic field topology and
Varela, J., Reville, V., Brun, A., Pantellini, F., Zarka, Philippe   +4 more
openaire   +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

Radio emission altitudes in pulsar magnetospheres [PDF]

Monthly Notices of the Royal Astronomical Society, 1997
A geometrical analysis of the pulse-profile widths at 0.43 and 1.42 GHz (Arecibo) as well as at 1.41 GHz (Effelsberg) is presented. We have measured the profile pulse widths at the lowest possible intensity level. An empirical relationship for the pulsar radio emission altitudes is proposed. We argue that for the millisecond pulsars the emission region
J. Kijak, J. Gil
openaire   +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