Other
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.7906c&link_type=abstract
American Astronomical Society, 194th AAS Meeting, #79.06; Bulletin of the American Astronomical Society, Vol. 31, p.963
Other
Scientific paper
We analyzed simultaneous EUV data from the Transition Region And Coronal Explorer (TRACE) and Hα data from Big Bear Solar Observatory (BBSO). In the active region studied, we found several EUV jets that repeatedly occurred where pre-existing magnetic flux was canceled by newly emerging flux of opposite polarity. The jets look like, but are usually smaller and shorter lived than Yohkoh soft X-ray jets. The EUV jets have a typical size of 4000-10,000 km, a transverse velocity of 50-100 km s(-1) , and a lifetime of 2-4 minutes. Each of the jets was ejected from a loop-like bright EUV emission patch at the moment when the patch reached its peak emission. We also found dark Hα surges that are correlated with these jets. A careful comparison, however, revealed that the Hα jets are not cospatial with the EUV jets. Instead, the EUV jets are are identified with bright jetlike features in the Hα line center, which are distinct from dark surges. Our results support a picture in which Hα surges and EUV jets represent different kinds of plasma ejection --- cool and hot plasma ejections along different field lines --- which must be dynamically connected to each other. We emphasize the importance of observed flux cancellation and a small erupting filament in understanding the acceleration mechanisms of EUV jets and Hα surges. This work is partially supported by NSF under grant ATM-97-14796 and NASA under grants NAG5-4919, NAG5-7349, and NAG5-7350 to BBSO.
Chae Jongchul
Goode Philip. R.
Qiu Jianwei
Wang Hai-Hong
No associations
LandOfFree
Extreme-Ultraviolet Jets and Hα Surges in Solar Microflares does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extreme-Ultraviolet Jets and Hα Surges in Solar Microflares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extreme-Ultraviolet Jets and Hα Surges in Solar Microflares will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1121776