Pregled bibliografske jedinice broj: 1075892
Evolution of Coronal Mass Ejections and the Corresponding Forbush Decreases: Modeling vs. Multi-Spacecraft Observations
Evolution of Coronal Mass Ejections and the Corresponding Forbush Decreases: Modeling vs. Multi-Spacecraft Observations // Solar physics, 295 (2020), 7; article id.104, 33 doi:10.1007/s11207-020-01671-7 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1075892 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Evolution of Coronal Mass Ejections and the Corresponding Forbush
Decreases: Modeling vs. Multi-Spacecraft Observations
Autori
Dumbović, Mateja ; Vršnak, Bojan ; Guo, Jingnan ; Heber, Bernd ; Dissauer, Karin ; Carcaboso, Fernando ; Temmer, Manuela ; Veronig, Astrid ; Podladchikova, Tatiana ; Möstl, Christian ; Amerstorfer, Tanja ; Kirin, Anamarija
Izvornik
Solar physics (0038-0938) 295
(2020), 7;
Article id.104, 33
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Coronal mass ejections ; interplanetary ; Cosmic rays ; galactic ; Astrophysics - Solar and Stellar Astrophysics
Sažetak
One of the very common in situ signatures of interplanetary coronal mass ejections (ICMEs), as well as other interplanetary transients, are Forbush decreases (FDs), i.e. short-term reductions in the galactic cosmic ray (GCR) flux. A two-step FD is often regarded as a textbook example, which presumably owes its specific morphology to the fact that the measuring instrument passed through the ICME head on, encountering first the shock front (if developed), then the sheath, and finally the CME magnetic structure. The interaction of GCRs and the shock/sheath region, as well as the CME magnetic structure, occurs all the way from Sun to Earth, therefore, FDs are expected to reflect the evolutionary properties of CMEs and their sheaths. We apply modeling to different ICME regions in order to obtain a generic two-step FD profile, which qualitatively agrees with our current observation-based understanding of FDs. We next adapt the models for energy dependence to enable comparison with different GCR measurement instruments (as they measure in different particle energy ranges). We test these modeling efforts against a set of multi- spacecraft observations of the same event, using the Forbush decrease model for the expanding flux rope (ForbMod). We find a reasonable agreement of the ForbMod model for the GCR depression in the CME magnetic structure with multi-spacecraft measurements, indicating that modeled FDs reflect well the CME evolution.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
HRZZ-IP-2018-01-7549 - Milimetarska i submilimetarska opažanja Sunčeve kromosfere pomoću ALMA-e (MSOC) (Brajša, Roman, HRZZ - 2018-01) ( CroRIS)
Ustanove:
Geodetski fakultet, Zagreb,
Veleučilište u Karlovcu
