English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Measurements of Solar Differential Rotation Using the Century Long Kodaikanal Sunspot Data

Jha, B. K., Priyadarshi, A., Mandal, S., Chatterjee, S., & Banerjee, D. (2021). Measurements of Solar Differential Rotation Using the Century Long Kodaikanal Sunspot Data. Solar Physics, 296: 25. doi:10.1007/s11207-021-01767-8.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Jha, Bibhuti Kumar, Author
Priyadarshi, Aditya, Author
Mandal, Sudip1, Author
Chatterjee, Subhamoy , Author
Banerjee, Dipankar, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1832289              

Content

show
hide
Free keywords: -
 Abstract: The rotational profile of the Sun is considered to be one of the key inputs in a solar dynamo model. Hence, precise and long-term measurements of this quantity is important for our understanding of solar magnetism and its variability. In this study, we use the newly digitised, white-light sunspot data (1923 – 2011) from Kodaikanal Solar Observatory (KoSO) to derive the solar rotation profile. An automated correlation-based sunspot tracking algorithm is implemented to measure the rotation parameters, A, the equatorial rotation rate, and B, the latitudinal gradient. Our measurements of A=14.381±0.004 deg/day and B=−2.72±0.04 deg/day compare well with previous studies. In our analysis, we find that the bigger sunspots (with area > 400 μHem) rotate slower than the smaller ones. At the same time, we do not find any variation in the rotation rates between activity extremes, i.e. solar maxima and minima. Lastly, we employ our tracking algorithm on the Michelson Doppler Imager (MDI) data and compare the MDI results with our KoSO values.

Details

show
hide
Language(s): eng - English
 Dates: 2021
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1007/s11207-021-01767-8
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Solar Physics
  Other : Sol. Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Dordrecht, Holland : Kluwer, etc.
Pages: - Volume / Issue: 296 Sequence Number: 25 Start / End Page: - Identifier: ISSN: 0038-0938
CoNE: https://pure.mpg.de/cone/journals/resource/954925445694