Τίτλος:
A shock associated (SA) radio event and related phenomena observed from the base of the solar corona to 1 AU
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
We present for the first time an almost complete frequency coverage of a Shock Associated (SA) radio event and related phenomena observed on May 6, 1996 at 9:27 UT. It is observed from the base of the solar corona up to almost 1 Astronomical Unit (AU) from the Sun by the following radio astronomical instruments: the Ondřejov spectrometer operating between 4.5 GHz and 1 GHz (radiation produced near the chromosphere); the Thermopyles Artemis-IV spectrograph operating between 600 MHz and 110 MHz (distance range about 1.1-1.4 R⊙ from sun center); the Nançay Decameter Array operating between 75 and 25 MHz (distance range about 1.4-2 R⊙); and the RAD2 and RAD1 radio receivers on the WIND spacecraft covering the range from 14 MHz to about 20 kHz (distance range between 3 R⊙ and about 1 AU). Observations at the Nançay Decameter Array clearly show that the SA event starts from a coronal type II radio burst which traces the progression of a shock wave through the corona above 1.8 R⊙-2 R⊙ from the sun center. This SA event has no associated radio emission in the decimetric-metric range, thus there is no evidence for electron injection in the low/middle corona. Copyright 1998 by the American Geophysical Union.
Συγγραφείς:
Bougeret, J.-L.
Zarka, P.
Caroubalos, G.
Karlický, M.
Leblanc, Y.
Maroulis, D.
Hillaris, A.
Moussas, X.
Alissandrakis, G.E.
Dumas, G.
Perche, C.
Περιοδικό:
GEOPHYSICAL RESEARCH LETTERS
Εκδότης:
Wiley-Blackwell Publishing Ltd
Λέξεις-κλειδιά:
Shock waves; Sodium compounds; Solar radiation; Space optics; Electromagnetic wave emission; Electrons; Frequencies; Radio astronomy; Radio receivers; Shock waves; Spacecraft observatories; Spectrographs; Spectrometers; Sun, Astronomical instrument; Astronomical units; Distance ranges; Radio bursts; Radio emission; Solar corona; Type II; Wind spacecraft, Solar system; Astrophysics, Nancay decameter array; Shock associated radio event; Solar corona
