CMEs in the Heliosphere : I. A Statistical Analysis of the Observational Properties of CMEs Detected in the Heliosphere from 2007 to 2017 by STEREO/HI-1

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dc.contributor.author Harrison, R. A.
dc.contributor.author Davies, J. A.
dc.contributor.author Barnes, D.
dc.contributor.author Byrne, J. P.
dc.contributor.author Perry, C. H.
dc.contributor.author Bothmer, V.
dc.contributor.author Eastwood, J. P.
dc.contributor.author Gallagher, P. T.
dc.contributor.author Kilpua, E. K. J.
dc.contributor.author Möstl, C.
dc.contributor.author Rodriguez, L.
dc.contributor.author Rouillard, A. P.
dc.contributor.author Odstril, D.
dc.date.accessioned 2018-05-31T13:31:01Z
dc.date.available 2018-05-31T13:31:01Z
dc.date.issued 2018-05
dc.identifier.citation Harrison , R A , Davies , J A , Barnes , D , Byrne , J P , Perry , C H , Bothmer , V , Eastwood , J P , Gallagher , P T , Kilpua , E K J , Möstl , C , Rodriguez , L , Rouillard , A P & Odstril , D 2018 , ' CMEs in the Heliosphere : I. A Statistical Analysis of the Observational Properties of CMEs Detected in the Heliosphere from 2007 to 2017 by STEREO/HI-1 ' , Solar Physics , vol. 293 , no. 5 , 77 .
dc.identifier.other PURE: 107170339
dc.identifier.other PURE UUID: 0196ccbf-5ceb-43ba-8d79-128841e857fe
dc.identifier.other WOS: 000431959700007
dc.identifier.other Scopus: 85046246883
dc.identifier.other ORCID: /0000-0002-4489-8073/work/45438311
dc.identifier.uri http://hdl.handle.net/10138/235474
dc.description.abstract We present a statistical analysis of coronal mass ejections (CMEs) imaged by the Heliospheric Imager (HI) instruments on board NASA's twin-spacecraft STEREO mission between April 2007 and August 2017 for STEREO-A and between April 2007 and September 2014 for STEREO-B. The analysis exploits a catalogue that was generated within the FP7 HELCATS project. Here, we focus on the observational characteristics of CMEs imaged in the heliosphere by the inner (HI-1) cameras, while following papers will present analyses of CME propagation through the entire HI fields of view. More specifically, in this paper we present distributions of the basic observational parameters - namely occurrence frequency, central position angle (PA) and PA span - derived from nearly 2000 detections of CMEs in the heliosphere by HI-1 on STEREO-A or STEREO-B from the minimum between Solar Cycles 23 and 24 to the maximum of Cycle 24; STEREO-A analysis includes a further 158 CME detections from the descending phase of Cycle 24, by which time communication with STEREO-B had been lost. We compare heliospheric CME characteristics with properties of CMEs observed at coronal altitudes, and with sunspot number. As expected, heliospheric CME rates correlate with sunspot number, and are not inconsistent with coronal rates once instrumental factors/differences in cataloguing philosophy are considered. As well as being more abundant, heliospheric CMEs, like their coronal counterparts, tend to be wider during solar maximum. Our results confirm previous coronagraph analyses suggesting that CME launch sites do not simply migrate to higher latitudes with increasing solar activity. At solar minimum, CMEs tend to be launched from equatorial latitudes, while at maximum, CMEs appear to be launched over a much wider latitude range; this has implications for understanding the CME/solar source association. Our analysis provides some supporting evidence for the systematic dragging of CMEs to lower latitude as they propagate outwards. en
dc.format.extent 28
dc.language.iso eng
dc.relation.ispartof Solar Physics
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Coronal mass ejections
dc.subject Heliosphere
dc.subject Space weather
dc.subject CORONAL MASS EJECTIONS
dc.subject SOLAR-WIND
dc.subject MISSION
dc.subject SUN
dc.subject PROPAGATION
dc.subject EARTH
dc.subject SPACECRAFT
dc.subject LASCO
dc.subject 115 Astronomy, Space science
dc.title CMEs in the Heliosphere : I. A Statistical Analysis of the Observational Properties of CMEs Detected in the Heliosphere from 2007 to 2017 by STEREO/HI-1 en
dc.type Article
dc.contributor.organization Department of Physics
dc.contributor.organization Space Physics Research Group
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0038-0938
dc.rights.accesslevel openAccess
dc.type.version publishedVersion
dc.identifier.url https://link.springer.com/article/10.1007/s11207-018-1297-2

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