22–27 Sept 2025
INAF, Osservatorio Astronomico di Roma
Europe/Rome timezone

Coronal Density Fluctuations in the Middle Corona Observed by Metis

26 Sept 2025, 09:00
25m
Aula Gratton (INAF, Osservatorio Astronomico di Roma)

Aula Gratton

INAF, Osservatorio Astronomico di Roma

Via Frascati, 33, 00078 Monteporzio Catone (RM)
Invited Talk Invited Talk

Speaker

Vincenzo Andretta (Istituto Nazionale di Astrofisica (INAF))

Description

The Metis coronagraph on board Solar Orbiter allows observations of the middle solar corona at spatial resolutions that can rival or surpass those attained by other operating coronagraphs over a field of view going from 1.6 to 3.4 degrees, corresponding to the range 1.7 - 3.6 solar radii at perihelion. The instrument is also capable to observe the corona at high temporal cadences - down to 20 s - for extended observing runs, or down to 1 s for a few minutes.
Since the beginning of the mission nominal science phase in 2022, these capabilities have been utilized to obtain observations that are opening a new window on the dynamics of the solar corona in a range of previously unexplored parameters. I present and discuss, in particular, the detection of density fluctuations in the corona above 2 solar radii with characteristic periods in the range 3-5 minutes.

Sessions Wave generation, energy transport, dissipation and heating

Author

Vincenzo Andretta (Istituto Nazionale di Astrofisica (INAF))

Presentation materials

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