[Astronomy seminar] Astronomy Seminar 18th of September: 10:30 zoom: João da Silva Santos

Mon Sep 14 10:43:13 CEST 2020

Dear all,

On Friday September 18, 10:30, we will have the PhD seminar remotely via zoom.

Our speaker is João da Silva Santos from Stockholm University and he will speak about:

Title: Probing the solar chromosphere with millimeter interferometry

Abstract: The landscape of active regions in the solar atmosphere is marked by extended, bright patches named plage regions as well as loop-like structures which trace magnetic field lines that confine plasma several megameters above the solar surface. Within these environments, it is also common to observe different types of small-scale, short-lived optical and ultraviolet brightenings, which have been linked to magnetic reconnection processes in the low atmosphere. Therefore, solar active regions can be regarded as plasma laboratories for the study of the interplay between gas dynamics and magnetic fields. However, progress has been somewhat hampered partly due to the difficulty in interpreting the most widely used spectral diagnostics.

In this seminar I will discuss how a new observing window opened by the Atacama Large Millimeter/submillimeter Array (ALMA) can be used to address many unsettled questions in solar physics and, particularly, I will show some of the first results of solar active region studies with ALMA. The diagnostic capabilities of the millimeter continuum for both hot and cold regions and for persistent heating in plage and transient phenomena in flux emergence regions will be highlighted. I will also explore the synergy between ALMA and other facilities observing at different wavelengths.

We will have the colloquium using zoom. You will find the invitation at the end of this email.

Some guidelines:

1) Join the session with your microphone muted.

2) When you have a question, press the “raise hand button” and wait till you are asked to ask your question.

3) The session will be online from 10:20, please join at least a few minutes early as we would like to start 10:30 sharp.

We hope to see all of you there!

Arjan & Janet

Upcoming events:

25/9: Freeke van der Voort (Cardiff, UK)
2/10: Ernest Alsina (Locarno, Switserland)
9/10: Enric Palle (IAC, Spain)
16/10: Charlotte Angus (DARK, Denmark)

===========================================

Janet Ting-Wan Chen is inviting you to a scheduled Zoom meeting.

Topic: Astronomy Seminar João Santos
Time: Sep 18, 2020 10:30 AM Stockholm

Join Zoom Meeting
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Meeting ID: 625 5998 0654
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---------------------------
Dr. Janet Ting-Wan Chen
Marie Skłodowska-Curie Fellow
The Oskar Klein Centre, Department of Astronomy,
AlbaNova, SE-106 91 Stockholm, Sweden
phone:+46 76 697 7965

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