News & Events

HEPL / KIPAC Seminar

Wednesday, SEptember 7, 2016

M. Cristina Rabello Soares

University of Minas Gerais (Brazil)

Analysis of Acoustic Waves Near and Around Solar Active Regions

Abstract: The properties of solar acoustic waves change as they propagate through a magnetically active region. These variations have beenextensively studied with the aims of studying the effects of magnetic fields on wave propagation, generation, and absorption, and also of inferring the subsurface structure of sunspots.

I will discuss our recent results on how the acoustic waves propagating in a quiet region are affected by a nearby active region. Our analysis is based on ring diagram analysis of all active regions observed by HMI (SDO) during almost five years. I will also discuss how local changes could be responsible for the global variation observed over a solar cycle. Finally, I will give an overview on possible detection of mode frequencies due to magnetic cycle on other stars by Kepler and Corot satellites.

Bio: Not Available.

Time: 1:30 – 2:30pm

Location: Physics/Astrophysics Bldg., Kistler Conference Rooms 102/103 (Map)

(Light refreshments at1:15pm; Presentation begins at 1:30pm)

Open to All