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SUMMARY:Evidence of external reconnection between an erupting mini-filamen
 t and ambient loops observed by Solar Orbiter/EUI
DTSTART;VALUE=DATE-TIME:20230509T151000Z
DTEND;VALUE=DATE-TIME:20230509T152500Z
DTSTAMP;VALUE=DATE-TIME:20240704T115653Z
UID:indico-contribution-320@meetings.aip.de
DESCRIPTION:Speakers: Zhuofei Li (MPS)\nMini-filament eruptions are one of
  the most common small-scale transients in the solar atmosphere. They are 
 small-scale analogs to solar filaments. They are associated with coronal j
 ets that represent transient\, collimated plasma ejections along open fiel
 ds or far-reaching coronal loops. One particular type is blowout jets. The
 se often come along with erupting loops or twisted filaments at the base o
 f the jets. Consequently they have a more dynamic base and also often a wi
 der spire than standart jets. Recently\, a mini-filament eruption model ha
 s been put forward\, in which a successful mini-filament eruption drives a
  blowout jet\, while a partial or failed mini-filament eruption causes a s
 tandard jet. During blowout jets\, many blobs have been observed and drawn
  much attention as they could provide evidence of the magnetic reconnectio
 n process\, because these blobs are odten identified with plasmaoids in th
 e current sheet. However\, it is still difficult to observationally clarif
 y the relation between the moving plasma blobs and magnetic reconnection. 
 The clarification is mainly limited by the low spatio-temporal resolution 
 of previous data. Here\, with a combination of 174 Å images at high spati
 al resolution and high cadence taken by the Extreme Ultraviolet Imager on 
 board Solar Orbiter and images of the Atmospheric Imaging Assembly on boar
 d Solar Dynamics Observatory\, we investigate in detail an erupting mini-f
 ilament over a weak magnetic field region on 2022 March 4. During the erup
 tion\, two bright ribbons clearly appeared underneath the erupting mini-fi
 lament as it quickly ascended. Subsequently\, some dark materials blew out
  when the erupting mini-filament interacted with the outer ambient loops\,
  thus forming a blowout jet characterized by a widening spire. At the same
  time\, a chain of small bright blobs with diameters of 1–2 Mm are inter
 mittently expelled from the interaction region between the erupting mini-f
 ilament and ambient loops and propagated along the post-eruption loops tow
 ard the footpoints of the erupting fluxes at a speed of ~ 100 km/s. They h
 ave short lifetimes\, varying from 30 s to 90 s. They also caused a semi-c
 ircular brightening structure. We suggest that these fast-moving blobs are
  evidence for magnetic reconnection. We performed a differential emission 
 measure (DEM) analysis and found that various brightenings show plasma tha
 t is heated during the mini-filament eruption\, e.g. two bright ribbons\, 
 footpoints of the ambient loops\, and the interaction region. Based on the
  features aforementioned\, we suggest that the mini-filament eruption firs
 t experiences internal reconnection that occurs underneath the erupting mi
 ni-filament and then external reconnection between the mini-filament and t
 he ambient loops. The transfer of mass and magnetic flux from the erupting
  mini-filament to the ambient corona is mainly due to the external reconne
 ction.\n\nhttps://meetings.aip.de/event/24/contributions/320/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/320/
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