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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004192naa a2200397 4500
001oai:DiVA.org:kth-234638
003SwePub
008180912s2018 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2346382 URI
0247 a https://doi.org/10.1029/2018JA0253432 DOI
040 a (SwePub)kth
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Giagkiozis, Stefanosu Univ Sheffield, Automat Control & Syst Engn, Sheffield, S Yorkshire, England.4 aut
2451 0a Statistical Study of the Properties of Magnetosheath Lion Roars
264 1b American Geophysical Union (AGU),c 2018
338 a print2 rdacarrier
500 a QC 20180912
520 a Lion roars are narrowband whistler wave emissions that have been observed in several environments, such as planetary magnetosheaths, the Earth's magnetosphere, the solar wind, downstream of interplanetary shocks, and the cusp region. We present measurements of more than 30,000 such emissions observed by the Magnetospheric Multiscale spacecraft with high-cadence (8,192 samples/s) search coil magnetometer data. A semiautomatic algorithm was used to identify the emissions, and an adaptive interval algorithm in conjunction with minimum variance analysis was used to determine their wave vector. The properties of the waves are determined in both the spacecraft and plasma rest frame. The mean wave normal angle, with respect to the background magnetic field (B-0), plasma bulk flow velocity (V-b), and the coplanarity plane (V-b x B-0) are 23 degrees, 56 degrees, and 0 degrees, respectively. The average peak frequencies were similar to 31% of the electron gyrofrequency (omega(ce)) observed in the spacecraft frame and similar to 18% of omega(ce) in the plasma rest frame. In the spacecraft frame, similar to 99% of the emissions had a frequency < omega(ce), while 98% had a peak frequency < 0.72 omega(ce) in the plasma rest frame. None of the waves had frequencies lower than the lower hybrid frequency, omega. From the probability density function of the electron plasma beta(e), the ratio between the electron thermal and magnetic pressure, similar to 99.6% of the waves were observed with beta(e) < 4 with a large narrow peak at 0.07 and two smaller, but wider, peaks at 1.26 and 2.28, while the average value was similar to 1.25.
650 7a NATURVETENSKAPx Fysikx Fusion, plasma och rymdfysik0 (SwePub)103032 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Fusion, Plasma and Space Physics0 (SwePub)103032 hsv//eng
7001 a Wilson, Lynn B.u NASA, Goddard Space Flight Ctr, Heliophys Sci Div, Greenbelt, MD USA.4 aut
7001 a Burch, James L.u Southwest Res Inst, San Antonio, TX USA.4 aut
7001 a Le Contel, Olivieru Univ Paris Sud, Sorbonne Univ, CNRS, Lab Phys Plasmas,UMR7648,Ecole Polytech,Observ Pa, Paris, France.4 aut
7001 a Ergun, Robert E.u Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA.4 aut
7001 a Gershman, Daniel J.u NASA, Goddard Space Flight Ctr, Fields & Particles, Greenbelt, MD USA.;Univ Maryland, Dept Astron, College Pk, MD 20742 USA.4 aut
7001 a Lindqvist, Per-Arneu KTH,Rymd- och plasmafysik4 aut0 (Swepub:kth)u1yukyk9
7001 a Mirioni, Laurentu Sorbonne Univ UPMC Paris Sud 11, LPP, CNRS, Ecole Polytech, Palaiseau, France.4 aut
7001 a Moore, Thomas E.u NASA, Goddard Space Flight Ctr, Heliophys Sci Div, Greenbelt, MD USA.4 aut
7001 a Strangeway, Robert J.u Univ Calif Los Angeles, Dept Geophys & Planetary Phys, Los Angeles, CA 90024 USA.;Univ Calif Los Angeles, Earth & Space Sci, Los Angeles, CA USA.4 aut
7102 a Univ Sheffield, Automat Control & Syst Engn, Sheffield, S Yorkshire, England.b NASA, Goddard Space Flight Ctr, Heliophys Sci Div, Greenbelt, MD USA.4 org
7730 t Journal of Geophysical Research - Space Physicsd : American Geophysical Union (AGU)g 123:7, s. 5435-5451q 123:7<5435-5451x 2169-9380x 2169-9402
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-234638
8564 8u https://doi.org/10.1029/2018JA025343

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