NDLI: Internal rotation of the Sun as inferred from GONG observations

Content Provider	Springer Nature Link
Author	Gavryuseva, E. A. Gavryusev, V. G. Mauro, M. P.
Copyright Year	2000
Abstract	Helioseismology is a direct and most informative method of studying the structure and dynamics of the Sun. Determining the internal differential rotation of the Sun requires that the frequencies of its eigentones be estimated with a high accuracy, which is possible only on the basis of continuous long-term observations. The longest quasi-continuous series of data have been obtained by the Global Oscillation Network Group (GONG). The parameters of each individual mode of solar acoustic oscillations with low spherical degrees l=0, 1, 2, 3, 4, 5, 6 are determined by using 1260-day-long series of GONG observations. The mean frequency splitting by rotation for the modes of each radial order n is calculated by using all possible combinations between the eigenfrequencies in multiplets. As a result, it has become possible to statistically estimate the splitting and its measurement errors for the modes of each radial order. The mean splitting for each given degree l=1–6 is presented under the assumption of its independence of oscillation frequency, which holds for the achieved accuracy. The frequencies and splittings for the modes with low spherical degrees l, together with the MDI group results for higher degrees l, are used to invert the radial profile of solar angular velocity. Using the SOLA method to solve the inverse problem of restoring the rotation profile has yielded solutions sensitive to the deepest stellar interiors. Our results indicate that the solar core rotates faster than the surface, and there may be a local minimum in angular velocity at its boundary.
Starting Page	261
Ending Page	267
Page Count	7
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	26
Issue Number	4
e-ISSN	15626873
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2000-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	solar oscillations solar differential rotation Astronomy 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

Rotation of the solar core from BiSON and LOWL frequency observations

Acoustic Radius Measurements from MDI and GONG

Seismic view of the solar interior

A joined model for solar dynamo and differential rotation

Lowering of Asymmetry

Helioseismology

22-year variations of the solar rotation and solar activity cycles

Variations in solar sub-surface rotation from GONG data 1995–1998

Perspectives on the interior of the Sun

Internal rotation of the Sun as inferred from GONG observations

Similar Documents

Rotation of the solar core from BiSON and LOWL frequency observations

Acoustic Radius Measurements from MDI and GONG

Seismic view of the solar interior

A joined model for solar dynamo and differential rotation

Lowering of Asymmetry

Helioseismology

22-year variations of the solar rotation and solar activity cycles

Variations in solar sub-surface rotation from GONG data 1995–1998

Perspectives on the interior of the Sun

Internal rotation of the Sun as inferred from GONG observations