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Related papers: The Saturnian Kilometric Radiation before the Cass…

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On 17 October 2008, the Cassini spacecraft crossed the southern sources of Saturn kilometric radiation (SKR), while flying along high-latitude nightside magnetic field lines. In situ measurements allowed us to characterize for the first…

Earth and Planetary Astrophysics · Physics 2011-01-21 L. Lamy , P. Schippers , P. Zarka , B. Cecconi , C. Arridge , M. K. Dougherty , P. Louarn , N. Andre , W. S. Kurth , R. L. Mutel , D. A. Gurnett , A. J. Coates

The Cassini mission crossed the source region of the Saturn kilometric radiation (SKR) on 17 October 2008. On this occasion, the Radio and Plasma Wave Science (RPWS) experiment detected both local and distant radio sources, while plasma…

Earth and Planetary Astrophysics · Physics 2015-03-25 L. Lamy , B. Cecconi , P. Zarka , P. Canu , P. Schippers , W. S. Kurth , R. L. Mutel , D. A. Gurnett , J. D. Menietti , P. Louarn

The Saturn Kilometric Radiation (SKR) was observed for the first time during the flyby of Saturn by the Voyager spacecraft in 1980. These radio emissions, in the range of a few kHz to 1 MHz, are emitted by electrons travelling around…

Earth and Planetary Astrophysics · Physics 2022-03-18 Baptiste Cecconi , Olivier Witasse , Caitriona M. Jackman , Beatriz Sánchez-Cano , M. Leila Mays

From the 27th to the 28th January 2009, the Cassini spacecraft remotely acquired combined observations of Saturns southern aurorae at radio, ultraviolet and infrared wavelengths, while monitoring ion injections in the middle magnetosphere…

Earth and Planetary Astrophysics · Physics 2015-03-25 L. Lamy , R. Prangé , W. Pryor , J. Gustin , S. V. Badman , H. Melin , T. Stallard , D. G. Mitchell , P. C. Brandt

Among the persistent questions raised by the existence of a rotational modulation of the Saturn Kilometric Radiation (SKR), the origin of the variability of the 10.8 hours SKR period at a 1% level over weeks to years remains intriguing.…

Earth and Planetary Astrophysics · Physics 2011-02-16 Laurent Lamy

Throughout 2017, the Hubble Space Telescope (HST) observed the northern far-ultraviolet aurorae of Saturn at northern solstice, during the Cassini Grand Finale. These conditions provided a complete viewing of the northern auroral region…

Earth and Planetary Astrophysics · Physics 2018-08-27 L. Lamy , R. Prangé , C. Tao , T. Kim , S. V. Badman , P. Zarka , B. Cecconi , W. S. Kurth , W. Pryor , E. Bunce , A. Radioti

Auroral kilometric radiation (AKR) is the paradigm of intense radio emission from planetary magnetospheres. Being close to the electron gyro frequency and/or its lower harmonics, its observation indicates the non-thermal state of the source…

Space Physics · Physics 2023-02-07 W. Baumjohann , R. A. Treumann

Saturn's magnetic field is remarkably axisymmetric. Its dipole axis is inclined by less than 0.2 deg with respect to its rotation axis. Rotationally driven convection of magnetospheric plasma breaks the axisymmetry of its external magnetic…

Astrophysics · Physics 2015-06-24 Peter Goldreich , Alison J. Farmer

The last 22.5 orbits of the Cassini mission brought the spacecraft to less than 3000 km from Saturn's 1-bar surface. These close encounters offered an unprecedented view of Saturn's magnetic field, including contributions from the internal…

The first observations of Saturn's visible-wavelength aurora were made by the Cassini camera. The aurora was observed between 2006 and 2013 in the northern and southern hemispheres. The color of the aurora changes from pink at a few hundred…

Earth and Planetary Astrophysics · Physics 2015-10-28 Ulyana A. Dyudina , Andrew P. Ingersoll , Shawn P. Ewald , Danika Wellington

The observed disparity between the radial dependence of the ion and electron densities measured by the Cassini plasma and radio science instruments are used to show that the region between the outer edge of Saturn's main rings and its…

Space Physics · Physics 2017-01-11 Robert E Johnson , Wei-Lin Tseng , Meredith K Elrod , Ann M Persoon

The aurorae of Uranus were recently detected in the far ultraviolet with the Hubble Space Telescope (HST) providing a new, so far unique, means to remotely study the asymmetric Uranian magnetosphere from Earth. We analyze here two new HST…

Earth and Planetary Astrophysics · Physics 2017-03-07 L. Lamy , R. Prangé , K. C. Hansen , C. Tao , S. W. H. Cowley , T. Stallard , H. Melin , N. Achilleos , P. Guio , S. V. Badman , T. Kim , N. Pogorelov

Bodies such as planets, moons, and asteroids in our solar system are the brightest objects in the low-frequency radio astronomy at $\lesssim$ 10 GHz. The low-frequency radio emissions from our solar system bodies exhibit various observed…

Earth and Planetary Astrophysics · Physics 2023-03-15 Tomoki Kimura , Yuka Fujii , Hajime Kita , Fuminori Tsuchiya , Hideo Sagawa , the SKA-Japan Planetary Science Team

Solar radio bursts (SRBs) are intense emissions observed in radio wavelengths most frequently during solar transients, such as coronal mass ejections (CMEs) and flares. SRBs are direct signatures of accelerated electrons in the solar…

Radio synchrotron emission, its polarization and its Faraday rotation are powerful tools to study the strength and structure of interstellar magnetic fields. In the Milky Way, Faraday rotation of the polarized emission from pulsars and…

Instrumentation and Methods for Astrophysics · Physics 2010-08-24 R. Beck

Temperatures of the outer planet thermospheres exceed those predicted by solar heating alone by several hundred degrees. Enough energy is deposited at auroral regions to heat the entire thermosphere, but models predict that equatorward…

Earth and Planetary Astrophysics · Physics 2021-02-24 Zarah Brown , Tommi Koskinen , Ingo Mueller-Wodarg , Robert West , Alain Jouchoux , Larry Esposito

Every 19 years, Saturn passes through Jupiter's 'flapping' magnetotail. Here, we report Chandra X-ray observations of Saturn planned to coincide with this rare planetary alignment and to analyse Saturn's magnetospheric response when…

Earth and Planetary Astrophysics · Physics 2021-07-14 D. M. Weigt , W. R. Dunn , C. M. Jackman , R. Kraft , G. Branduardi-Raymont , J. D. Nichols , A. D. Wibisono , M. F. Vogt , G. R. Gladstone

Using the Advanced CCD Imaging Spectrometer (ACIS), the Chandra X-ray Observatory (CXO) observed the Saturnian system for one rotation of the planet (~37 ks) on 20 January, 2004, and again on 26-27 January, 2004. In this letter we report…

The era of outer planet orbiters (Galileo, Juno and Cassini) is advancing our understanding of how the radiation belts of Jupiter and Saturn are structured, form and evolve well beyond what had been possible during the age of flyby missions…

Earth and Planetary Astrophysics · Physics 2021-09-15 Elias Roussos , Peter Kollmann

Nearly everything we know about extrasolar planets to date comes from optical astronomy. While exoplanetary aurorae are predicted to be bright at low radio frequencies (< 1 GHz), we consider the effect of an exoplanet transit on radio…

Earth and Planetary Astrophysics · Physics 2019-01-16 Benjamin J. S. Pope , Paul Withers , Joseph R. Callingham , Marissa F. Vogt
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