NDLI: Dynamics of magnetic tubes during the formation of a large sunspot

Content Provider	Springer Nature Link
Author	Grigor’ev, V. M. Ermakova, L. V. Khlystova, A. I.
Copyright Year	2012
Abstract	The emergence of new magnetic flux in the powerful active region NOAA 10488 on the Sun and the formation of a leading spot is studied using SOHO/MDI data. Magnetograms of the longitudinal magnetic field and radial-velocity data obtained with a temporal resolution of 1 min are analyzed. The analysis begins several hours before the appearance of the top of a rising buoyant loop-like tube of magnetic field in the photosphere and finishes two days later, when the leading spot has formed. The emerging arches of magnetic field had a complex, multi-layered structure. Their apparent concentration can be explained by the emergence of the leading base of an ascending Ω tube. The new magnetic flux emerged in the inner parts of the active region throughout the formation of the leading sunspot, and was accompanied by the development of a penumbra and the appearance of the Evershed effect in the southwest sector of the sunspot. Simultaneous with the development of Evershed flows, the outer parts of the longitudinal magnetic field were gradually separated from the sunspot in the radial direction. As a result, a moat and a quasi-annular structure were formed in the magnetic field. The formation of a “moat” cell is part of the unified large-scale formation of the sunspot and the entire active region. The formation of an active region and of its structures is a manifestation of large-scale processes taking place in subphotospheric layers.
Starting Page	878
Ending Page	886
Page Count	9
File Format	PDF
ISSN	10637729
Journal	Astronomy Reports
Volume Number	56
Issue Number	11
e-ISSN	15626881
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2012-11-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astronomy, Observations and Techniques
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

Mass upflows and magnetic-field dynamics in a forming sunspot penumbra

The role of rising magnetic tubes in the formation of impulsive coronal mass ejections

The Maunder minimum: North-south asymmetry in sunspot formation, mean sunspot latitudes, and the butterfly diagram

Turbulent effects of sunspot magnetic field reconstruction

Large-Scale Structure of the Sunspot Activity and the Background Magnetic Field Formation

Radial profile of sunspot magnetic field on the SDO data

Latitude characteristics of the sunspot formation zone and the 11-year solar activity cycle

The microwave radiation of the corona above a large single sunspot in right- and left-circular polarization

Measurement of the formation heights of UV and EUV emission above sunspot umbrae from observations of three-minute oscillations

Dynamics of magnetic tubes during the formation of a large sunspot

Similar Documents

Mass upflows and magnetic-field dynamics in a forming sunspot penumbra

The role of rising magnetic tubes in the formation of impulsive coronal mass ejections

The Maunder minimum: North-south asymmetry in sunspot formation, mean sunspot latitudes, and the butterfly diagram

Turbulent effects of sunspot magnetic field reconstruction

Large-Scale Structure of the Sunspot Activity and the Background Magnetic Field Formation

Radial profile of sunspot magnetic field on the SDO data

Latitude characteristics of the sunspot formation zone and the 11-year solar activity cycle

The microwave radiation of the corona above a large single sunspot in right- and left-circular polarization

Measurement of the formation heights of UV and EUV emission above sunspot umbrae from observations of three-minute oscillations

Dynamics of magnetic tubes during the formation of a large sunspot