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Band-splitting of coronal and interplanetary type II bursts. I. Basic properties


Vršnak, Bojan; Aurass, Henry; Magdalenić, Jasmina; Gopalswamy, Nat
Band-splitting of coronal and interplanetary type II bursts. I. Basic properties // Astronomy and Astrophysics, 377 (2001), 321-329 (međunarodna recenzija, članak, znanstveni)


Naslov
Band-splitting of coronal and interplanetary type II bursts. I. Basic properties

Autori
Vršnak, Bojan ; Aurass, Henry ; Magdalenić, Jasmina ; Gopalswamy, Nat

Izvornik
Astronomy and Astrophysics 377 (2001); 321-329

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
SUN: RADIO RADIATION; MHD; SHOCK WAVES; SUN: CORONA; INTERPLANETARY MEDIUM

Sažetak
Patterns analogous to the band-splitting of metric type II bursts are found in a number of type II bursts observed in the dekameter-kilometer wavelength range. A similarity of morphological and frequency-time characteristics of two emission components are indicative of a common source. Relative frequency splits span in the range Delta f/f=0.05{-}0.6. At radial distances between 2 and 4 Rsun only small splits around 0.1 can be found. In the interplanetary space the relative split on average increases with the radial distance, whereas the inferred shock velocity decreases. In three events extrapolations of the split components point to the base and the peak of the jump in the local plasma frequency caused by the associated shock passage at 1 AU. This is suggestive of the plasma radiation from the regions upstream and downstream of the shock. Adopting this interpretation, one finds that the drop of Delta f/f at 2-4 Rsun is congruent with the Alfvén velocity maximum expected there. The split increase and the velocity decrease at larger distances can be explained as a consequence of declining Alfvén speed in the interplanetary space.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007004

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Jasmina Magdalenić (autor)

Avatar Url Bojan Vršnak (autor)

Citiraj ovu publikaciju

Vršnak, Bojan; Aurass, Henry; Magdalenić, Jasmina; Gopalswamy, Nat
Band-splitting of coronal and interplanetary type II bursts. I. Basic properties // Astronomy and Astrophysics, 377 (2001), 321-329 (međunarodna recenzija, članak, znanstveni)
Vršnak, B., Aurass, H., Magdalenić, J. & Gopalswamy, N. (2001) Band-splitting of coronal and interplanetary type II bursts. I. Basic properties. Astronomy and Astrophysics, 377, 321-329.
@article{article, year = {2001}, pages = {321-329}, keywords = {SUN: RADIO RADIATION, MHD, SHOCK WAVES, SUN: CORONA, INTERPLANETARY MEDIUM}, journal = {Astronomy and Astrophysics}, volume = {377}, title = {Band-splitting of coronal and interplanetary type II bursts. I. Basic properties}, keyword = {SUN: RADIO RADIATION, MHD, SHOCK WAVES, SUN: CORONA, INTERPLANETARY MEDIUM} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI


Uključenost u ostale bibliografske baze podataka:


  • NASA Astrophysical Data System