Fredagskollokvium: On the nature of small-scale bright features in solar ALMA observations

Juan Camilo Guevara Gomez, PhD student of Rosseland Centre for Solar Physics (RoCS), Institute of Theoretical Astrophysics, UiO.

portrettbildet av en ung smilende man med briller og svart hår
Juan Camillo Guevara Gomez, solar physicist of RoCS. Photo credits: ITA/UiO.

Observations of the Sun with ALMA have become a big asset to study the dynamic of the solar chromosphere. In this talk, I will describe the main characteristics of small-scale bright features detected in ALMA Bands 3 (~100 GHz) and 6 (240 GHz) that appear to be associated with MHD modes, one of the phenomena that are thought to significantly contribute to the heating of the solar atmosphere.
Additionally, the height difference between 2 pairs of ALMA sub-bands is also shown and thereafter used to estimate the propagation of waves through the solar chromosphere.
Finally, a first attempt to estimate energy fluxes due to MHD waves with ALMA observations is described.


bildet av solflekker på solaatmosfæren

This Friday colloquium will be hybrid. Attendees can therefore participate either in-person or via Zoom. Please join via Zoom at

Meeting ID: 690 0104 3754

Passcode: PeiseStua3

Attendees will be muted during the colloquium, but will have the opportunity to ask questions at the end by clicking on the "raise hand” button (or send a request via chat).

Emneord: fredagskollokvium, institute seminar, Solfysikk, ALMA, radio astronomy
Publisert 24. aug. 2022 17:36 - Sist endret 24. aug. 2022 17:37