caa a22 4500 445346760 CHVBK 20180317142831.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s11207-010-9696-z doi (NATIONALLICENCE)springer-10.1007/s11207-010-9696-z Imaging Spectroscopy of a White-Light Solar Flare [Elektronische Daten] [J. Martínez Oliveros, S. Couvidat, J. Schou, S. Krucker, C. Lindsey, H. Hudson, P. Scherrer] We report observations of a white-light solar flare (SOL2010-06-12T00:57, M2.0) observed by the Helioseismic Magnetic Imager (HMI) on the Solar Dynamics Observatory (SDO) and the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). The HMI data give us the first space-based high-resolution imaging spectroscopy of a white-light flare, including continuum, Doppler, and magnetic signatures for the photospheric Fei line at 6173.34Åand its neighboring continuum. In the impulsive phase of the flare, abright white-light kernel appears in each of the two magnetic footpoints. When the flare occurred, the spectral coverage of the HMI filtergrams (six equidistant samples spanning ±172mÅaround nominal line center) encompassed the line core and the blue continuum sufficiently far from the core to eliminate significant Doppler crosstalk in the latter, which is otherwise a possibility for the extreme conditions in a white-light flare. RHESSI obtained complete hard X-ray and γ-ray spectra (this was the first γ-ray flare of Cycle24). The Fei line appears to be shifted to the blue during the flare but does not go into emission; the contrast is nearly constant across the line profile. We did not detect a seismic wave from this event. The HMI data suggest stepwise changes of the line-of-sight magnetic field in the white-light footpoints. The Author(s), 2011 Chromospheric heating nationallicence Flares nationallicence Particle acceleration nationallicence Solar Dynamics Observatory nationallicence Martínez Oliveros J. Space Sciences Laboratory, University of California, Berkeley, CA, USA aut Couvidat S. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, USA aut Schou J. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, USA aut Krucker S. Space Sciences Laboratory, University of California, Berkeley, CA, USA aut Lindsey C. North West Research Associates, CORA Division, Boulder, CO, USA aut Hudson H. Space Sciences Laboratory, University of California, Berkeley, CA, USA aut Scherrer P. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, USA aut Solar Physics Springer Netherlands 269/2(2011-04-01), 269-281 0038-0938 269:2<269 2011 269 11207 https://doi.org/10.1007/s11207-010-9696-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9696-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Martínez Oliveros J. Space Sciences Laboratory, University of California, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Couvidat S. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, USA aut NATIONALLICENCE 700 1- Schou J. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, USA aut NATIONALLICENCE 700 1- Krucker S. Space Sciences Laboratory, University of California, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Lindsey C. North West Research Associates, CORA Division, Boulder, CO, USA aut NATIONALLICENCE 700 1- Hudson H. Space Sciences Laboratory, University of California, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Scherrer P. W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA, USA aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 269/2(2011-04-01), 269-281 0038-0938 269:2<269 2011 269 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer