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| Titel |
Observational features of equatorial coronal hole jets |
| VerfasserIn |
G. Nisticò, V. Bothmer, S. Patsourakos, G. Zimbardo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 3 ; Nr. 28, no. 3 (2010-03-01), S.687-696 |
| Datensatznummer |
250016794
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| Publikation (Nr.) |
 copernicus.org/angeo-28-687-2010.pdf |
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| Zusammenfassung |
| 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−1, while the deceleration
rate appears to be about 0.11 km s−2, 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. |
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