Large and small solar coronal mass ejections
The large and small Coronal Mass Ejections (CMEs) and mini-CMEs are observed by the Extreme Ultra Violet Imager (EUVI) on the Solar Terrestrial Relation Observatory (STEREO). These eruption events are usually associated with dimming and wave-like brightenings. Here, the images of the full sun on 26...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2012-06-01
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| Series: | Iranian Journal of Physics Research |
| Subjects: | |
| Online Access: | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-562&slc_lang=en&sid=1 |
| _version_ | 1818063438637694976 |
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| author | N Alipour Rad H Safari |
| author_facet | N Alipour Rad H Safari |
| author_sort | N Alipour Rad |
| collection | DOAJ |
| description | The large and small Coronal Mass Ejections (CMEs) and mini-CMEs are observed by the Extreme Ultra Violet Imager (EUVI) on the Solar Terrestrial Relation Observatory (STEREO). These eruption events are usually associated with dimming and wave-like brightenings. Here, the images of the full sun on 26 Apr 2008 with STEREO spacecraft (behind) with the cadences of 10 minutes and 150 seconds and pixel size of 1.59 arcsecond in pass band 195 and 171 Å were analyzed. The velocities of the large and small wave-like brightening were 221 km.s-1 and 6 km.s-1, respectively. The zernike moments of events and non-events were computed and these features were fed to the Support Vector Machine (SVM) classifier. Using this method, 697 mini-CMEs on three different regions of solar corona were detected. The number of mini-CMEs was increased when the CMEs occurred. The average velocity of mini-dimmings was 13.8 km.s-1. |
| first_indexed | 2024-12-10T14:20:07Z |
| format | Article |
| id | doaj.art-606e5cdde47f4c08ac3a00924e05a46e |
| institution | Directory Open Access Journal |
| issn | 1682-6957 |
| language | English |
| last_indexed | 2024-12-10T14:20:07Z |
| publishDate | 2012-06-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Iranian Journal of Physics Research |
| spelling | doaj.art-606e5cdde47f4c08ac3a00924e05a46e2022-12-22T01:45:13ZengIsfahan University of TechnologyIranian Journal of Physics Research1682-69572012-06-011212936Large and small solar coronal mass ejectionsN Alipour RadH SafariThe large and small Coronal Mass Ejections (CMEs) and mini-CMEs are observed by the Extreme Ultra Violet Imager (EUVI) on the Solar Terrestrial Relation Observatory (STEREO). These eruption events are usually associated with dimming and wave-like brightenings. Here, the images of the full sun on 26 Apr 2008 with STEREO spacecraft (behind) with the cadences of 10 minutes and 150 seconds and pixel size of 1.59 arcsecond in pass band 195 and 171 Å were analyzed. The velocities of the large and small wave-like brightening were 221 km.s-1 and 6 km.s-1, respectively. The zernike moments of events and non-events were computed and these features were fed to the Support Vector Machine (SVM) classifier. Using this method, 697 mini-CMEs on three different regions of solar corona were detected. The number of mini-CMEs was increased when the CMEs occurred. The average velocity of mini-dimmings was 13.8 km.s-1.http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-562&slc_lang=en&sid=1sunCMEsmall scale events |
| spellingShingle | N Alipour Rad H Safari Large and small solar coronal mass ejections Iranian Journal of Physics Research sun CME small scale events |
| title | Large and small solar coronal mass ejections |
| title_full | Large and small solar coronal mass ejections |
| title_fullStr | Large and small solar coronal mass ejections |
| title_full_unstemmed | Large and small solar coronal mass ejections |
| title_short | Large and small solar coronal mass ejections |
| title_sort | large and small solar coronal mass ejections |
| topic | sun CME small scale events |
| url | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-562&slc_lang=en&sid=1 |
| work_keys_str_mv | AT nalipourrad largeandsmallsolarcoronalmassejections AT hsafari largeandsmallsolarcoronalmassejections |