[IGPP Everyone] SPACE SCIENCE SEMINAR - WINTER QUARTER - Friday January 17, 2020 - Geology 6704 - 3:30 pm
Marjorie Sowmendran
margie at igpp.ucla.edu
Tue Jan 14 09:01:29 PST 2020
Seminar on Friday January 17, 2020
SPACE PHYSICS SEMINAR
DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES
DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES
UNIVERSITY OF CALIFORNIA, LOS ANGELES
(AOS M275B, EPSS M288B)
Probing Solar Chromospheric Temperatures and Dynamics with ALMA and IBIS
Kevin Reardon
National Solar Observatory, Boulder, CO
ABSTRACT
Even after decades of detailed study, many mysteries about the solar chromosphere remain. Making progress on these questions will be a key focus of solar physics in the coming years. In this talk, I will show recent work in this area combining imaging spectroscopy in the optical using the Interferometric Bidimensional Spectrometer (IBIS) and millimeter diagnostics from the Atacama Large Millimeter Array (ALMA). Using these instruments, we can probe the chromospheric temperature structure and dynamics on time scales of tens of seconds and at spatial scales of a few 100 km. We find evidence that spectral-line parameters of H-alpha and Ca II are closely correlated with the ALMA brightness temperatures. I will discuss how this changes our understanding of chromospheric dynamics and the interpretation of the observed spectral intensities. Finally, I will provide an overview of advances we expect on these questions from the soon-to-be-operational DKI Solar Telescope (DKIST).
Friday, January 17, 2020
Room 6704 Geology
3:30 - 5:00 PM
In-Charge: C. T. Russell
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