NDLI: MHD simulations of sunspot rotation and the coronal consequences

Content Provider	Springer Nature Link
Author	Gerrard, C.L. Brown, D.S. Mellor, C. Arber, T.D. Hood, A.W.
Copyright Year	2003
Abstract	A simplified magnetic configuration is used to model some aspects of observations of a rotating sunspot and its overlying coronal loops. In the observations a large sunspot rotates over a few days and two smaller pores spiral into it. The coronal loops become sigmoidal in shape and flares are seen in Yohkoh/SXT and GOES. We have modeled the sunspot, one of the pores and the loops connecting these to a diffuse region of plasma of the opposite polarity. Two sets of MHD simulations are considered: (i) rotation of the sunspot and pore alone and (ii) rotation of the sunspot with inflow of the pore. Rotation alone can trigger the ideal kink instability in the loops but only for a rotation that is much greater than the observed value. There is no build-up of current which is needed for magnetic reconnection to occur. However, when inflow is included a strong build-up of current is seen as the pore merges with the sunspot. Comparing these results from the simulations with the observations, we find that the observed merging of the pores coincides with the timing of the flare. Therefore, we suggest that the merging of the pores with the large sunspot may be responsible for the flaring.
Starting Page	39
Ending Page	54
Page Count	16
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	213
Issue Number	1
e-ISSN	1573093X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2003-01-01
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

Synthesis of CME-Associated Moreton and EIT Wave Features from MHD Simulations

Short Quasi-Periodic MHD Waves in Coronal Structures

Coronal Loops Above a Sunspot Region

MHD Waves and Heating in Coronal Holes

THE CORRELATION BETWEEN SUNSPOT AND CORONAL HOLE CYCLES AND A FORECAST OF THE MAXIMUM OF SUNSPOT CYCLE 23

Study of Multiple Coronal Mass Ejections at Solar Minimum Conditions

Periodicities in the coronal rotation and sunspot numbers

Initiation of Coronal Mass Ejections by Sunspot Rotation

LASCO observations of the coronal rotation

MHD simulations of sunspot rotation and the coronal consequences

Similar Documents

Synthesis of CME-Associated Moreton and EIT Wave Features from MHD Simulations

Short Quasi-Periodic MHD Waves in Coronal Structures

Coronal Loops Above a Sunspot Region

MHD Waves and Heating in Coronal Holes

THE CORRELATION BETWEEN SUNSPOT AND CORONAL HOLE CYCLES AND A FORECAST OF THE MAXIMUM OF SUNSPOT CYCLE 23

Study of Multiple Coronal Mass Ejections at Solar Minimum Conditions

Periodicities in the coronal rotation and sunspot numbers

Initiation of Coronal Mass Ejections by Sunspot Rotation

LASCO observations of the coronal rotation

MHD simulations of sunspot rotation and the coronal consequences