Počet záznamů: 1
The first coronal mass ejection observed in both visible-light and UV H I Ly-alpha channels of the Metis coronagraph on board Solar Orbiter
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SYSNO ASEP 0552536 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The first coronal mass ejection observed in both visible-light and UV H I Ly-alpha channels of the Metis coronagraph on board Solar Orbiter Tvůrce(i) Andretta, V. (IT)
Bemporad, A. (IT)
De Leo, Y. (DE)
Heinzel, Petr (ASU-R) RID, ORCIDCelkový počet autorů 71 Číslo článku L14 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 656, December (2021)Poč.str. 10 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Sun ; atmosphere ; corona Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) Způsob publikování Open access s časovým embargem (01.01.2023) Institucionální podpora ASU-R - RVO:67985815 UT WOS 000730246400058 EID SCOPUS 85121615319 DOI 10.1051/0004-6361/202142407 Anotace We show the first Metis observations of a CME, obtained on 16 and 17 January 2021. The event was also observed by the EUI/FSI imager on board Solar Orbiter, as well as by other space-based coronagraphs, such as STEREO-A/COR2 and SOHO/LASCO/C2, whose images are combined here with Metis data. Different images are analysed here to reconstruct the 3D orientation of the expanding CME flux rope using the graduated cylindrical shell model. This also allows us to identify the possible location of the source region. Measurements of the CME kinematics allow us to quantify the expected Doppler dimming in the Ly-alpha channel. Observations show that most CME features seen in the visible-light images are also seen in the Ly-alpha images, although some features in the latter channel appear more structured than their visible-light counterparts. We estimated the expansion velocity of this event to be below 140 km s(-1). Hence, these observations can be understood by assuming that Doppler dimming effects do not strongly reduce the Ly-alpha emission from the CME. These velocities are comparable with or smaller than the radial velocities inferred from the same data in a similar coronal structure on the east side of the Sun. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2022 Elektronická adresa https://doi.org/10.1051/0004-6361/202142407
Počet záznamů: 1