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Fibrillar Chromospheric Spicule-Like Counterparts to an EUV and Soft X-Ray Blowout Coronal JetWe observe an erupting jet feature in a solar polar coronal hole, using data from Hinode/SOT, EIS, and XRT, with supplemental data from STEREO/EUVI. From EUV and soft X-ray (SXR) images we identify the erupting feature as a blowout coronal jet: in SXRs it is a jet with bright base, and in EUV it appears as an eruption of relatively cool (approximately 50,000 K) material of horizontal size scale approximately 30" originating from the base of the SXR jet. In SOT Ca II H images the most pronounced analog is a pair of thin (approximately 1") ejections, at the locations of either of the two legs of the erupting EUV jet. These Ca II features eventually rise beyond 45", leaving the SOT field of view, and have an appearance similar to standard spicules except that they are much taller. They have velocities similar to that of "type II" spicules, approximately 100 kilometers per second, and they appear to have spicule-like substructures splitting off from them with horizontal velocity approximately 50 kilometers per second, similar to the velocities of splitting spicules measured by Sterling et al. (2010). Motions of splitting features and of other substructures suggest that the macroscopic EUV jet is spinning or unwinding as it is ejected. This and earlier work suggests that a sub-population of Ca II type II spicules are the Ca II manifestation of portions of larger-scale erupting magnetic jets. A different sub-population of type II spicules could be blowout jets occurring on a much smaller horizontal size scale than the event we observe here.
Document ID
20100042281
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Sterling, Alphonse C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Harra, Louise K. (Mullard Space Science Lab. Dorking, United Kingdom)
Moore, Ronald L. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 25, 2013
Publication Date
October 11, 2010
Subject Category
Solar Physics
Report/Patent Number
M10-0910
M11-0039
Meeting Information
Meeting: Hinode-4: Unsolved Problems and Recent Insights
Location: Palermo, Italy
Country: Italy
Start Date: October 11, 2010
End Date: October 15, 2010
Sponsors: University of Palermo
Distribution Limits
Public
Copyright
Public Use Permitted.

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