NDLI: An analysis of photospheric vector magnetograms, Hα images and soft X-ray images in a superactive region NOAA 7321

Content Provider	Springer Nature Link
Author	Liu, Yang Akioka, Maki Yan, Yihua Ai, Guoxiang
Copyright Year	1998
Abstract	Based on the photospheric vector magnetograms taken at Huairou Solar Observing Station (HSOS), Hα images taken at Hiraiso Solar Terrestrial Research Center of Communication Research Laboratory, soft X-ray images taken by Yohkoh and an extrapolation method, the magnetic field structures and some active phenomena of the active region AR 7321 around 04:12 UT on 27 October 1992 are analyzed in this paper. A divergence of the transverse magnetic field, located at a newly formed spot, was found. At least four highly sheared magnetic field systems separately spread from this divergence to four other sites around this divergence. Vertical current concentrations are upward in this region and downward in the other four sites, and the corresponding Hα bright patches and soft X-ray bright loops coincide with these structures, confirming the existence of these four systems. The extrapolated magnetic force lines reconstructed by the Boundary Element Method (BEM), force-free field assumption, and boundary condition of observed photospheric vector magnetic field, coincide in space with the Hα bright patches and soft X-ray bright loops, showing that this extrapolation method is very effective and suggesting that the Hα bright patches and soft X-ray bright loops in this case represent the magnetic field structures in the upper atmosphere of the Sun.The bright structures in the Hα images and the soft X-ray images have a close correlation with the non-potential characteristics of the magnetic fields.
Starting Page	395
Ending Page	410
Page Count	16
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	177
Issue Number	1-2
e-ISSN	1573093X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1998-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astrophysics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

EVIDENCE OF MAGNETIC RECONNECTION FROM Hα, SOFT X-RAY AND PHOTOSPHERIC MAGNETIC FIELD OBSERVATIONS

Magnetic field gradient and flare: study of a small flare in NOAA 8038

Precise determination of cooling times of post-flare loops from the detailed comparison between Hα and soft X-ray images

A comparison between photospheric and chromospheric quiet-Sun magnetograms

Magnetic Helicity of Solar Active Regions as Revealed by Vector Magnetograms and Coronal X-Ray Images

Similarities between chromospheric and photospheric quiet-Sun magnetograms

Can We Improve the Preprocessing of Photospheric Vector Magnetograms by the Inclusion of Chromospheric Observations?

3D Coronal magnetic field from vector magnetograms: non-constant-α force-free configuration of the active region NOAA 8151

Photospheric, chromospheric and helioseismic signatures of a large flare in super-active region NOAA 10486

An analysis of photospheric vector magnetograms, Hα images and soft X-ray images in a superactive region NOAA 7321

Similar Documents

EVIDENCE OF MAGNETIC RECONNECTION FROM Hα, SOFT X-RAY AND PHOTOSPHERIC MAGNETIC FIELD OBSERVATIONS

Magnetic field gradient and flare: study of a small flare in NOAA 8038

Precise determination of cooling times of post-flare loops from the detailed comparison between Hα and soft X-ray images

A comparison between photospheric and chromospheric quiet-Sun magnetograms

Magnetic Helicity of Solar Active Regions as Revealed by Vector Magnetograms and Coronal X-Ray Images

Similarities between chromospheric and photospheric quiet-Sun magnetograms

Can We Improve the Preprocessing of Photospheric Vector Magnetograms by the Inclusion of Chromospheric Observations?

3D Coronal magnetic field from vector magnetograms: non-constant-α force-free configuration of the active region NOAA 8151

Photospheric, chromospheric and helioseismic signatures of a large flare in super-active region NOAA 10486

An analysis of photospheric vector magnetograms, Hα images and soft X-ray images in a superactive region NOAA 7321