Discovery of rapid whistlers close to Jupiter implying lightning rates similar to those on Earth

Kód výsledku v IS VaVaI

RIV/00216208:11320/18:10389441 - isvavai.cz

Nalezeny alternativní kódy

RIV/68378289:_____/18:00490176

Výsledek na webu

https://doi.org/10.1038/s41550-018-0442-z

DOI - Digital Object Identifier

10.1038/s41550-018-0442-z

Jazyk výsledku

angličtina

Název v původním jazyce

Discovery of rapid whistlers close to Jupiter implying lightning rates similar to those on Earth

Popis výsledku v původním jazyce

Electrical currents in atmospheric lightning strokes generate impulsive radio waves in a broad range of frequencies, called atmospherics. These waves can be modified by their passage through the plasma environment of a planet into the form of dispersed whistlers(1). In the Io plasma torus around Jupiter, Voyager 1 detected whistlers as several-seconds-long slowly falling tones at audible frequencies(2). These measurements were the first evidence of lightning at Jupiter. Subsequently, Jovian lightning was observed by optical cameras on board several spacecraft in the form of localized flashes of light(3-7). Here, we show measurements by the Waves instrument(8) on board the Juno spacecraft(9-11) that indicate observations of Jovian rapid whistlers: a form of dispersed atmospherics at extremely short timescales of several milliseconds to several tens of milliseconds. On the basis of these measurements, we report over 1,600 lightning detections, the largest set obtained to date. The data were acquired during close approaches to Jupiter between August 2016 and September 2017, at radial distances below 5 Jovian radii. We detected up to four lightning strokes per second, similar to rates in thunderstorms on Earth(12) and six times the peak rates from the Voyager 1 observations(13).

Název v anglickém jazyce

Discovery of rapid whistlers close to Jupiter implying lightning rates similar to those on Earth

Popis výsledku anglicky

Electrical currents in atmospheric lightning strokes generate impulsive radio waves in a broad range of frequencies, called atmospherics. These waves can be modified by their passage through the plasma environment of a planet into the form of dispersed whistlers(1). In the Io plasma torus around Jupiter, Voyager 1 detected whistlers as several-seconds-long slowly falling tones at audible frequencies(2). These measurements were the first evidence of lightning at Jupiter. Subsequently, Jovian lightning was observed by optical cameras on board several spacecraft in the form of localized flashes of light(3-7). Here, we show measurements by the Waves instrument(8) on board the Juno spacecraft(9-11) that indicate observations of Jovian rapid whistlers: a form of dispersed atmospherics at extremely short timescales of several milliseconds to several tens of milliseconds. On the basis of these measurements, we report over 1,600 lightning detections, the largest set obtained to date. The data were acquired during close approaches to Jupiter between August 2016 and September 2017, at radial distances below 5 Jovian radii. We detected up to four lightning strokes per second, similar to rates in thunderstorms on Earth(12) and six times the peak rates from the Voyager 1 observations(13).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

LTAUSA17070: Elektromagnetické vlny v planetárních ionosférách a magnetosférách

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature Astronomy

ISSN

2397-3366

e-ISSN

—

Svazek periodika

2

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

544-548

Kód UT WoS článku

000437959800016

EID výsledku v databázi Scopus

2-s2.0-85048235667