caa a22 4500 44534718X CHVBK 20180317142832.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s11207-011-9833-3 doi (NATIONALLICENCE)springer-10.1007/s11207-011-9833-3 Ning Zongjun Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, 210008, Nanjing, China aut Speed Distributions of Merging X-Ray Sources During Chromospheric Evaporation in Solar Flares [Elektronische Daten] [Zongjun Ning] We explore the speed distributions of X-ray source motions after the start of chromospheric evaporation in two Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) flares. First, we make CLEAN images at 15 energy bands with a 12 second integration window; then, we outline a flaring loop geometry to cover the looptop and footpoint sources as much as possible. Consistent with the previous steps, we find converging motion of the double footpoint sources along the flaring loop in these two events. This motion is dependent on the energy band and time and is typically seen at 3 - 25keV, indicating a chromospheric evaporation origin. The speed distributions at various energy bands are measured for the 10 September 2002 flare, which exhibits a separation-to-mergence motion pattern well correlated with the rising-to-decay phases at 50 - 100keV. Springer Science+Business Media B.V., 2011 Flares nationallicence X-ray bursts, hard nationallicence Solar Physics Springer Netherlands 273/1(2011-10-01), 81-92 0038-0938 273:1<81 2011 273 11207 https://doi.org/10.1007/s11207-011-9833-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9833-3 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ning Zongjun Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, 210008, Nanjing, China aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 273/1(2011-10-01), 81-92 0038-0938 273:1<81 2011 273 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer