Observational features of equatorial coronal hole jets
Collimated ejections of plasma called "coronal hole jets" are commonly observed in polar coronal holes. However, such coronal jets are not only a specific features of polar coronal holes but they can also be found in coronal holes appearing at lower heliographic latitudes. In this paper...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2010-03-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/28/687/2010/angeo-28-687-2010.pdf |
| _version_ | 1819103048922824704 |
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| author | G. Nisticò V. Bothmer S. Patsourakos G. Zimbardo |
| author_facet | G. Nisticò V. Bothmer S. Patsourakos G. Zimbardo |
| author_sort | G. Nisticò |
| collection | DOAJ |
| description | Collimated ejections of plasma called "coronal hole jets" are commonly
observed in polar coronal holes. However, such coronal jets are not only a
specific features of polar coronal holes but they can also be found in
coronal holes appearing at lower heliographic latitudes. In this paper we
present some observations of "equatorial coronal hole jets" made up with
data provided by the STEREO/SECCHI instruments during a period comprising
March 2007 and December 2007. The jet events are selected by requiring at
least some visibility in both COR1 and EUVI instruments. We report 15 jet
events, and we discuss their main features. For one event, the uplift
velocity has been determined as about 200 km s<sup>−1</sup>, while the deceleration
rate appears to be about 0.11 km s<sup>−2</sup>, less than solar gravity. The
average jet visibility time is about 30 min, consistent with jet observed
in polar regions. On the basis of the present dataset, we provisionally
conclude that there are not substantial physical differences between polar
and equatorial coronal hole jets. |
| first_indexed | 2024-12-22T01:44:16Z |
| format | Article |
| id | doaj.art-918ffc539fbc412d88f5c219ad1179e0 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-22T01:44:16Z |
| publishDate | 2010-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-918ffc539fbc412d88f5c219ad1179e02022-12-21T18:43:08ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762010-03-012868769610.5194/angeo-28-687-2010Observational features of equatorial coronal hole jetsG. Nisticò0V. Bothmer1S. Patsourakos2G. Zimbardo3Dipartimento di Fisica, University of Calabria, Ponte P. Bucci Cubo 31C, 87036 Rende, ItalyInstitut für Astrophysik, Goettingen University, Friedrich-Hund Platz 1, 37077 Goettingen, GermanyDept. Physics-Section Astrogeophysics,University of Ioannina, 45110 Ioannina, GreeceDipartimento di Fisica, University of Calabria, Ponte P. Bucci Cubo 31C, 87036 Rende, ItalyCollimated ejections of plasma called "coronal hole jets" are commonly observed in polar coronal holes. However, such coronal jets are not only a specific features of polar coronal holes but they can also be found in coronal holes appearing at lower heliographic latitudes. In this paper we present some observations of "equatorial coronal hole jets" made up with data provided by the STEREO/SECCHI instruments during a period comprising March 2007 and December 2007. The jet events are selected by requiring at least some visibility in both COR1 and EUVI instruments. We report 15 jet events, and we discuss their main features. For one event, the uplift velocity has been determined as about 200 km s<sup>−1</sup>, while the deceleration rate appears to be about 0.11 km s<sup>−2</sup>, less than solar gravity. The average jet visibility time is about 30 min, consistent with jet observed in polar regions. On the basis of the present dataset, we provisionally conclude that there are not substantial physical differences between polar and equatorial coronal hole jets.https://www.ann-geophys.net/28/687/2010/angeo-28-687-2010.pdf |
| spellingShingle | G. Nisticò V. Bothmer S. Patsourakos G. Zimbardo Observational features of equatorial coronal hole jets Annales Geophysicae |
| title | Observational features of equatorial coronal hole jets |
| title_full | Observational features of equatorial coronal hole jets |
| title_fullStr | Observational features of equatorial coronal hole jets |
| title_full_unstemmed | Observational features of equatorial coronal hole jets |
| title_short | Observational features of equatorial coronal hole jets |
| title_sort | observational features of equatorial coronal hole jets |
| url | https://www.ann-geophys.net/28/687/2010/angeo-28-687-2010.pdf |
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