Results 41 to 50 of about 4,707 (204)

Revealing the Unseen: The Discovery of Long-awaited Radiation from the Intermittent Pulsar PSR B1931+24

The Astrophysical Journal Letters
Pulsars are typically characterized by their stable, highly magnetized, and fast-rotating nature, which underpins their persistent radio emissions. However, the discovery of prolonged radio-quiet (“off”) states in intermittent pulsars, such as PSR B1931 ...
Abdujappar Rusul, Z. G. Wen, J. P. Yuan, Ali Esamdin, X. P. Zheng, Michael Kramer   +5 more
doaj   +1 more source

Locating the source field lines of Jovian decametric radio emissions

Earth and Planetary Physics, 2020
Decametric (DAM) radio emissions are one of the main windows through which one can reveal and understand the Jovian magnetospheric dynamics and its interaction with the moons. DAMs are generated by energetic electrons through cyclotron-maser instability.
YuMing Wang, XianZhe Jia, ChuanBing Wang, Shui Wang, Vratislav Krupar   +4 more
doaj   +1 more source

Cassini observations of narrowband radio emissions in Saturn's magnetosphere [PDF]

Journal of Geophysical Research: Space Physics, 2010
The Radio and Plasma Wave Science instrument (RPWS) on board the Cassini spacecraft has detected numerous narrowband radio emissions in Saturn's magnetosphere from September 2005 to May 2007. Typically, the narrowband radio emissions occur after an intensification of Saturn kilometric radiation (SKR) and last for several days.
Z. Wang, D. A. Gurnett, G. Fischer, S.‐Y. Ye, W. S. Kurth, D. G. Mitchell, J. S. Leisner, C. T. Russell   +7 more
openaire   +1 more source

The Evolution of a Polar Cap Patch Into a Blob in the Nightside Ionosphere: Direct Observations of Multiple Blob Formation Mechanisms Acting Simultaneously on the Same Plasma

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract A polar cap patch was observed to exit the polar cap to become a blob as it entered the auroral oval on the nightside of the Earth under moderately quiet geomagnetic conditions (Kp = 3−). Auroral particle precipitation led to an increase in the electron density of the blob.
S. J. Maguire, A. G. Wood, D. R. Themens, E. M. Henley, S. E. Milan, Y. Soobiah, K. Oksavik, W. J. Miloch, J. C. Coxon, M. G. Johnsen   +9 more
wiley   +1 more source

Gamma-Ray Emissions from Pulsars: Spectra of the TEV Fluxes from Outer-Gap Accelerators

, 2000
We study the gamma-ray emissions from an outer-magnetospheric potential gap around a rotating neutron star. Migratory electrons and positrons are accelerated by the electric field in the gap to radiate copious gamma-rays via curvature process.
Aschenbach B., Becker W., Bowden C. C. G., Caswell J. L., Daishido T., Edwards P. G., El-Gowhari A., Gil J. A., Hirotani K., Hirotani K., K. Hirotani, Kanbach G., Krause-Polstoff J., Krause-Polstoff J., Kurt V. G., Manchester R. N., Miyazaki J., Nolan P. L., Ochelkov Yu. P., Ochelkov Yu. P., Pavlov G. G., Shearer A., Shibanov Yu. A., Zavlin V. E., Zavlin V. E., Zavlin V. E.   +25 more
core   +1 more source

JWST/NIRSpec Reveals the Atmospheric Driver of Saturn's Variable Magnetospheric Rotation Rate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Past measurements of Saturn's upper atmosphere have allowed only a broad scale view of the temperature and ion density structures within the auroral region. However, Saturn's auroral currents include a planetary period current component that is produced by neutral atmospheric flows.
Tom S. Stallard, Luke Moore, Henrik Melin, Chris G. A. Smith, Omakshi Agiwal, M. Nahid Chowdhury, Rosie E. Johnson, Katie L. Knowles, Emma M. Thomas, Paola I. Tiranti, James O’Donoghue, Khalid Mohamed, Ingo Mueller‐Wodarg, John C. Coxon, Sarah V. Badman, Joe A. Caggiano   +15 more
wiley   +1 more source

The Saturnian Kilometric Radiation before the Cassini Grand Finale

, 2017
The Saturnian Kilometric Radiation (SKR) is radiated from the auroral regions surrounding the kronian magnetic poles, above the ionosphere up to a few planetary radii.
Lamy, Laurent
core   +2 more sources

Towards a theory of extremely intermittent pulsars II: Asteroids at a close distance [PDF]

, 2013
We investigate whether there may be one or many companions orbiting at close distance to the light cylinder around the extremely intermittent pulsars PSR B1931+24 and PSR J1841-0500.
Bonazzola, Silvano, Heyvaerts, Jean, Mottez, Fabrice   +2 more
core   +3 more sources

Frequency Extensions of Auroral Kilometric Radiation: The Key to Unlocking Earth's Radio Response to Substorms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Auroral kilometric radiation (AKR) provides a sensitive probe of magnetospheric dynamics during substorms. We analyze an extended data set of AKR bursts observed by the WIND spacecraft to investigate how the frequency structure of AKR responds to substorm onset and evolution.
Simon James Walker, Caitríona M. Jackman, Alexandra R. Fogg, Siyuan Wu, James E. Waters   +4 more
wiley   +1 more source

ACTIVITY REPORT : Section 7. Magnetospheric Radio Emissions

ACTIVITY REPORT : Section 7. Magnetospheric Radio Emissions
  +12 more sources