Počet záznamů: 1
Flare Expansion to a Magnetic Rope Accompanied by Rare Radio Bursts
- 1.
SYSNO ASEP 0537303 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Flare Expansion to a Magnetic Rope Accompanied by Rare Radio Bursts Tvůrce(i) Zemanová, Alena (ASU-R) ORCID, RID
Karlický, Marian (ASU-R) RID, ORCID
Kašparová, Jana (ASU-R) RID, ORCID
Dudík, Jaroslav (ASU-R) RID, ORCIDČíslo článku 111 Zdroj.dok. Astrophysical Journal - ISSN 0004-637X
Roč. 905, č. 2 (2020)Poč.str. 13 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova solar-flares ; model ; reconnection Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA18-09072S GA ČR - Grantová agentura ČR GA19-09489S GA ČR - Grantová agentura ČR GA20-07908S GA ČR - Grantová agentura ČR GC20-09922J GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora ASU-R - RVO:67985815 UT WOS 000600081900001 EID SCOPUS 85098882615 DOI 10.3847/1538-4357/abc424 Anotace We present multispectral analysis (radio, H alpha, ultraviolet (UV)/extreme ultraviolet (EUV), and hard X-ray) of a confined flare from 2015 March 12. This flare started within the active region NOAA 12 297 and then it expanded into a large preexisting magnetic rope embedded with a cold filament. The expansion started with several brightenings located along the rope. This process was accompanied by a group of slowly positively drifting bursts in the 0.8-2 GHz range. The frequency drift of these bursts was 45-100 MHz s(-1). One of the bursts had an S-like form. During the brightening of the rope we observed a unique bright EUV structure transverse to the rope axis. The structure was observed in a broad range of temperatures and it moved along the rope with the velocity of about 240 km s(-1). When the structure dissipated, we saw a plasma further following twisted threads in the rope. The observed slowly positively drifting bursts were interpreted considering particle beams and we show that one with the S-like form could be explained by the beam propagating through the helical structure of the magnetic rope. The bright structure transverse to the rope axis was interpreted considering line-of-sight effects and the dissipation-spreading process, which we found to be more likely. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2021 Elektronická adresa https://doi.org/10.3847/1538-4357/abc424
Počet záznamů: 1