Study of a Coronal Mass Ejection with SOHO/UVCS and STEREO data |
| |
Authors: | Roberto Susino Alessandro Bemporad Sergio Dolei Angelos Vourlidas |
| |
Institution: | 1. INAF – Osservatorio Astrofisico di Torino, via Osservatorio 20, I-10025 Pino Torinese (TO), Italy;2. INAF – Osservatorio Astrofisico di Catania, via S. Sofia 78, I-95123 Catania, Italy;3. Space Sciences Division, Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, DC 20375, United States |
| |
Abstract: | We study the 3-D kinematics of a Coronal Mass Ejection (CME) using data acquired by the LASCO C2 and UVCS instruments on board SOHO, and the COR1 coronagraphs and EUVI telescopes on board STEREO. The event, which occurred on May 20, 2007, was a partial-halo CME associated with a prominence eruption. This is the first CME studied with UVCS data that occurred in the STEREO era. The longitudinal angle between the STEREO spacecrafts was ∼7.7° at that time, and this allowed us to reconstruct via triangulation technique the 3-D trajectory of the erupting prominence observed by STEREO/EUVI. Information on the 3-D expansion of the CME provided by STEREO/COR1 data have been combined with spectroscopic observations by SOHO/UVCS. First results presented here show that line-of-sight velocities derived from spectroscopic data are not fully in agreement with those previously derived via triangulation technique, thus pointing out possible limitations of this technique. |
| |
Keywords: | Corona Coronal Mass Ejection UV radiation |
本文献已被 ScienceDirect 等数据库收录! |
|