Napredna pretraga

Pregled bibliografske jedinice broj: 47171

Formation of coronal MHD shock waves - II. The pressure pulse mechanism


Vršnak, Bojan; Lulić, Slaven
Formation of coronal MHD shock waves - II. The pressure pulse mechanism // Solar Physics, 196 (2000), 1; 181-197 doi:10.1023/A:1005288310697 (međunarodna recenzija, članak, znanstveni)


Naslov
Formation of coronal MHD shock waves - II. The pressure pulse mechanism

Autori
Vršnak, Bojan ; Lulić, Slaven

Izvornik
Solar Physics (0038-0938) 196 (2000), 1; 181-197

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

Sažetak
The ignition of coronal shock waves by flares is investigated. It is assumed that an expolosive expansion of the source-region caused by impulsive heating generates a fast mode MHD blast wave which subsequently transforms into a shock wave. The solutions of 1-D MHD equations for the flaring region and for the external region are matched at their boundary. The obtained results show under what conditions flares can ignite shock waves that excite the metric type II bursts. The heat input rate per unit mass has to be sufficiently high and the preflare value of the plasma parameter beta in the flaring region has to be larger than beta_0^{;crit};. The critical values dependon the flare dimensions and impulsiveness. Larger and more impulsive flares are more effective in generating type II bursts. Shock waves of a higher Mach number require a higher preflare value of beta and a more powerful heating per unit mass. The results demonstrate why only a small fraction of flares is associated with type II bursts and why the association rate increases with the flare importance.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007004

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Slaven Lulić (autor)

Avatar Url Bojan Vršnak (autor)

Citiraj ovu publikaciju

Vršnak, Bojan; Lulić, Slaven
Formation of coronal MHD shock waves - II. The pressure pulse mechanism // Solar Physics, 196 (2000), 1; 181-197 doi:10.1023/A:1005288310697 (međunarodna recenzija, članak, znanstveni)
Vršnak, B. & Lulić, S. (2000) Formation of coronal MHD shock waves - II. The pressure pulse mechanism. Solar Physics, 196 (1), 181-197 doi:10.1023/A:1005288310697.
@article{article, year = {2000}, pages = {181-197}, DOI = {10.1023/A:1005288310697}, keywords = {}, journal = {Solar Physics}, doi = {10.1023/A:1005288310697}, volume = {196}, number = {1}, issn = {0038-0938}, title = {Formation of coronal MHD shock waves - II. The pressure pulse mechanism}, keyword = {} }

Časopis indeksira:


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


Uključenost u ostale bibliografske baze podataka:


  • Adstronomy and Astrophysics Abstracts


Citati