Browsing by Author "Lamy, L."
Now showing items 1-15 of 15
-
A particular form of Saturn kilometric radiation at the low end of its spectrum
Fischer, G.; Taubenschuss, U.; Pisa, D.; Lamy, L.; Wu, S.; Ye, S.-Y.; Jackman, C. M.; O'Dwyer, E. (2023)We studied the spectral morphology of Saturn kilometric radiation (SKR) with the Cassini RPWS (Radio and Plasma Wave Science) instrument and found a particular structure at very low frequencies which we nicknamed "caterpillar" ... -
Auroral emissions and inner magnetospheric dynamics during Earth's response to the 28th October 2021 Coronal Mass Ejection
Waters, J. E.; Jackman, C. M.; Whiter, D. K.; Fogg, A. R.; Lamy, L.; Carter, J. A.; Coxon, J. C.; Fryer, L.; Louis, C. K.; Paxton, L. J.; Briand, C.; Cecconi, B.; Issautier, K.; Bonnin, X.; Gallagher, P. (Dublin Institute for Advanced Studies, 2023)On 28th October 2021 the Sun released a large Coronal Mass Ejection (CME) in Earth's direction. An X1.0 class solar flare and a rare ground level enhancement (GLE) were observed, along with bright solar radio bursts. Here ... -
Characterization of Jovian hectometric sources with Juno: statistical position and generation by shell-type electrons
Collet, B.; Lamy, L.; Louis, C. K.; Zarka, P.; Prangé, P.; Louarn, P.; Sulaiman, A.; Kurth, W. S. K. (2023)The Juno orbiter has been exploring the polar magnetosphere of Jupiter since mid-2016. Thanks to its unique polar trajectory, it has crossed regularly the north- ern and southern sources of auroral hectometric radiation, ... -
Comparative visibility of planetary auroral radio emissions and implications for the search for exoplanets
Lamy, L.; Waters, J. E.; Louis, C. K. (2023)The auroral regions of the so-called radio planets are the source of powerful, non-thermal, radio emissions amplified by an electron-wave resonant instability. These emissions are produced near the planetary magnetic poles ... -
A consolidated catalogue of jovian decametric radio observations observed in Nançay from January 1978 to December 1990
Cecconi, B.; Debisshop, L.; Lamy, L.; Genova, F. (2023)A series of five Jovian decametric radio emission catalogues covering 13 years of observations (1978 to 1990) and published between 1981 and 1993 has been compiled after a digitisation process. The new catalogue has been ... -
First Analysis of the Effect of the Jovicentric Declination of the Earth on the Observation of Jovian Decametric Radio Emissions
Jácome, H. R. P.; Marques, M. S.; Zarka, P.; Echer, E.; Lamy, L.; Louis, C. K. (2023)Through analysis of the extensive catalog of the Nan cay Decameter Array, from 1978 to 2020, we demonstrate that the effect of the variation of the Jovicentric declination of the Earth on the visibility of Jovian decametric ... -
Follow-up radio observations of the τ Boötis exoplanetary system: preliminary results from NenuFAR
Turner, J. D.; Zarka, P.; Grießmeier, J.-M.; Mauduit, E.; Lamy, L.; Girard, J. N.; Kimura, T.; Cecconi, B.; Koopmans, L. V. E. (2023)Studying the magnetic fields of exoplanets will provide valuable information about their interior structures, atmospheric properties (escape and dynamics), and potential habitability. One of the most promising methods to ... -
Localisation of the main HOM source in the dusk side of the Jovian magnetosphere
Boudouma, A.; Zarka, P.; Magalhães, F. P.; Marques, M. S.; Louis, C. K.; Echer, E.; Lamy, L.; Prangé R. (2023)It was suggested in Zarka et al. (2021) that the most intense Jovian hectometric emissions (HOM) originate from the dusk side of the Jovian magnetosphere. These authors showed that the distribution of the main HOM observed ... -
A method for the automatic detection of solar type III radio bursts with Wind/Waves
Waters, J. E.; Jackman, C. M.; Fogg, A. R.; Louis, C.; Lamy, L.; Briand, C.; Bonnin, X.; Maksimovic, M.; Murphy, P. C.; Cecconi, B.; Issautier, K.; Whiter, D. K. (2023)Solar type III radio bursts have a characteristic signature in frequency-time dynamic spectrograms and provide important insight into the dynamics of the Sun and solar wind. Direct physical inferences of the source electrons ... -
Predictions for Uranus-moons radio emissions and comparison with Voyager 2/PRA observations
Jackman, C. M.; Cecconi, B.; Hess, S. L. G.; Louis, C. K.; Lamy, L. (2023)Jupiter's and Saturn's moons are known to induce auroral emission in the Ultraviolet wavelengths. At Jupiter, the moons Io, Europa and Ganymede are also responsible for powerful decametric radio emissions, driven by the ... -
Probing Jupiter-satellite interactions from the beaming of their decametric emissions: the case of Europa and Ganymede
Lamy, L.; Duchêne, A.; Mauduit, E.; Zarka, P.; Yerin, S.; Louis, C.; Griessmeier, J.-M.; Girard, J.; Theureau, G. (2023)In a recent study, we accurately measured the beaming of Io-Jupiter decametric emissions, whose uncertainty is controlled by that on the position of the active Io ux tube (IFT) hosting the radiosources. The active IFT was ... -
Re-exploring the radio spectrum of Uranus in orbit: science case and digital high-frequency receiver
Lamy, L.; Cecconi, B.; Dekkali, M.; Zarka, P.; Briand, C.; Moncuquet, M.; Pantellini, F.; Griton, L.; Boudouma, A.; Bonnin, X.; Astier, P.-L.; Dias, D.; Gamage, V.; Collet, B.; Louis, C. (2023)Among the known planetary magnetospheres, those of Uranus and Neptune display very similar radio environments so that they were referred to as radio twins. Their pioneering exploration by the Voyager 2 Planetary Radio ... -
Selection of low frequency extensions of Saturn kilometric radiation
O'Dwyer, E. P.; Jackman, C. M.; Domijan, K.; Lamy, L.; Louis, C. K. (2023)Saturn's Kilometric Radiation is an auroral emission that occurs between a few kHz to 1.2 MHz, and peaks in the frequency range 100-400 kHz (Kaiser et al., 1984). It was detected quasi-continuously by Cassini from its ... -
The peak frequency source of Saturn's kilometric radiation
Lamy, L.; Prangé, P.; Morooka, M.; Kurth, W. S.; Taubenschuss, U. (2023)In 2016-2017, the Cassini spacecraft explored the source regions of Saturn0s Kilometric Radiation (SKR) within the kronian polar magnetosphere before ultimately plunging into the upper atmosphere of the planet. This powerful, ... -
Using crossings of Saturn's magnetospheric boundaries to explore the link between upstream conditions and radio emission
Jackman, C. M.; O'Dwyer, E. P.; Louis, C. K.; Fogg, A. R.; Waters, J. E.; Lamy, L. (2023)Saturn has several components to its radio emission which can change in response to varying solar wind and magnetospheric conditions. These radio components include the Saturn Kilometric Radiation (SKR), a cyclotron maser ...