J/ApJ/893/78ivo://CDS.VizieR/J/ApJ/893/78doi:10.26093/cds/vizier.18930078CDSDecraemer B.Zhukov A.N.Van Doorsselaere T.2021-12-03T12:46:01Z2021-10-04T08:01:27ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frthe-sunTransverse waves are sometimes observed in solar helmet streamers, typically after the passage of a coronal mass ejection (CME). The CME-driven shock wave moves the streamer sideways, and a decaying oscillation of the streamer is observed after the CME passage. Previous works generally reported observations of streamer oscillations taken from a single vantage point (typically the Solar and Heliospheric Observatory (SOHO) spacecraft). We conduct a data survey searching for streamer wave events observed by the COR2 coronagraphs on board the STEREO spacecraft. For the first time, we report observations of streamer wave events from multiple vantage points by using the COR2 instrument on both STEREO A and B, as well as the SOHO/LASCO C2+C3 coronagraphs. We investigate the properties of streamer waves by comparing the different events and performing a statistical analysis. Common observational features give us additional insight on the physical nature of streamer wave events. The most important conclusion is that there appears to be no relation between the speed of the CME and the phase speed of the resulting streamer wave, indicating that the streamer wave speed is determined by the physical properties of the streamer rather than the properties of the CME. This result makes streamer wave events excellent candidates for coronal seismology studies. From a comparison between the measured phase speeds and the phase speeds calculated from the measured periods and wavelengths, we could determine that the speed of the postshock solar wind flow in our streamers is around 300km/s.2020ApJ...893...78Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/893/78CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/422/337 : Solar EUV Post-Eruptive Arcades (Tripathi+, 2004)J/A+A/440/373 : Earthbound interplanetary shocks (Howard+, 2005)J/ApJ/709/1238 : Solar Coronal Mass Ejection (Yeates+, 2010)J/ApJ/721/901 : Solar quiescent filament channels (Su+, 2010)J/ApJ/831/105 : Global energetics of solar flares. IV. CME (Aschwanden, 2016)J/MNRAS/456/1542 : Predicting CMEs transit times (Sudar+, 2016)J/ApJ/891/54 : Solar flares & associated CME speeds & widths (Ling+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/893/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/893/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/893/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/893/78https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/893/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/893/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/893/78/table1Summary of the physical parameters measured for the 22 streamer wave events identified with STEREO/COR2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEvent[1/22] Event numbermeta.id;meta.mainintObs[2008/2017] Year of Event starting datestime.epochInstObserving coronagraph(s) (1)meta.id;instrcharPA[0/325] Position angle, solar north at 0degpos.posAngintPer[120/480] Oscillation periodmintime.periodintlambda[2.86/8.55] Oscillation wavelengthsolRadem.wlfloatSpeed[360/740] Phase Speedkm/sphys.veloc;time.phaseintCMEHour of CME starting time, UTtime.epochPA-CME[37/330] Central position angle of CMEdegpos.posAngintWidth-CME[21/360] Width of CMEdegphys.angSize;srcintSpeed-CME[210/2030] Speed of CMEkm/sphys.velocint