NDLI: Investigation of recurrent EUV jets from highly dynamic magnetic field region

Content Provider	Springer Nature Link
Author	Joshi, Navin Chandra Chandra, Ramesh Guo, Yang Magara, Tetsuya Zhelyazkov, Ivan Moon, Young Jae Uddin, Wahab
Copyright Year	2016
Abstract	In this work, we present observations and interpretations of recurrent extreme ultraviolet (EUV) jets that occurred between 2012 July 1 21:00 UT and 2012 July 2 10:00 UT from the western edge of the NOAA active region 11513. Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA), SDO/Helioseismic and Magnetic Imager (SDO/HMI) and Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) observations have been used for the present study. Observations as well as potential-field source-surface (PFSS) extrapolation suggest an open field configuration in the vicinity of the jet activity area. 18 EUV jets were observed from the western edge of the active region along the open field channel. All the jet events appeared to be non-homologous and show different morphological properties and evolution. Some of the jets were small and narrow in size while the others were huge and wide. The average speed of these jets ranges from ${\sim}47\mbox{ to }{\sim}308~\mbox{km}\,\mbox{s}^{-1}$ . SDO/AIA 171 Å intensity profiles at the base of these jets show bumps corresponding to each jet, which is an evidence of recurrent magnetic reconnections. The magnetic field observation at the foot points of the jets revealed a very complex and dynamic magnetic activity which includes flux emergence, flux cancellation, dynamic motions, merging, separation, etc. We suggest that the recurrent jets are the result of recurrent magnetic reconnections among the various emerging bipolar fields themselves as well as with the open fields.
Starting Page	1
Ending Page	14
Page Count	14
File Format	PDF
ISSN	0004640X
Journal	Astrophysics and Space Science
Volume Number	362
Issue Number	1
e-ISSN	1572946X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-12-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sun: flares Sun: magnetic fields Sun: general Astrophysics and Astroparticles Astronomy, Observations and Techniques Cosmology Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) Astrobiology
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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