HR: 09:15h
AN: SH11C-03    [Abstracts]
TI: Tracing Coronal Waves Back to the Photosphere
AU: * De Pontieu, B
EM: bdp@lmsal.com
AF: Lockheed Martin Solar & Astrophysics Lab, 3251 Hanover Street Org. ADBS, Bldg. 252, Palo Alto, CA 94304 United States
AU: Erdelyi, R
EM: robertus@sheffield.ac.uk
AF: Solar Physics & upper-Atmosphere Research Group, University of Sheffield, Hicks Building Hounsfield Road, Sheffield, S3 7RH United Kingdom
AU: De Moortel, I
EM: ineke@mcs.st-and.ac.uk
AF: School of Mathematics and Statistics, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS United Kingdom
AU: Metcalf, T
EM: metcalf@lmsal.com
AF: Lockheed Martin Solar & Astrophysics Lab, 3251 Hanover Street Org. ADBS, Bldg. 252, Palo Alto, CA 94304 United States
AB: There are now many observations of waves with periods around 5 minutes in the outer atmosphere of the Sun. We provide an observational overview of 5 minute periodicity in chromospheric spicules in active region plage, upper transition region moss and the low legs of coronal loops. Using a numerical model, we show that all of these phenomena are connected: normally evanescent photospheric oscillations can propagate into the low atmosphere as long as they are guided along magnetic field lines that are inclined away from the vertical. The leaked photospheric oscillations develop into shocks and lead to periodic upward chromospheric flows, which we have identified as active region spicules. These shocks continue upwards and enter into the corona. We suggest that TRACE observations of propagating acoustic waves in the corona are shocked and tunneled photospheric oscillations. Using SOHO/MDI, TRACE and Imaging Vector Magnetograph (Hawaii) data we explore how these coronal waves can be exploited to determine the connectivity between photosphere and corona,and thus allow seismology of the lower solar atmosphere.
DE: 7507 Chromosphere
DE: 7509 Corona
DE: 7524 Magnetic fields
DE: 7529 Photosphere
DE: 7546 Transition region
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly