Detail publikace

Measuring Solar Differential Rotation with an Iterative Phase Correlation Method

HRAZDÍRA, Z. DRUCKMÜLLER, M. HABBAL, S.

Originální název

Measuring Solar Differential Rotation with an Iterative Phase Correlation Method

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

A reliable inference of the differential rotation rate of the solar photosphere is essential for models of the solar interior. The work presented here is based on a novel iterative phase correlation technique, which relies on the measurement of the local shift, at the central meridian, between two images separated by a given time interval. Consequently, it does not require any specific reference features, such as sunspots or supergranules, nor extended observations spanning several months. The reliability of the method is demonstrated by applying it to high spatial and temporal resolution continuum images of the solar photosphere, at 6173 A, acquired by the Solar Dynamics Observatory Helioseismic and Magnetic Imager over one complete Carrington rotation. The data selected covers the time period of 2020 January 1 to February 2. The method was applied to one day, and to the full time interval. The differential rotation rate derived using this feature-independent technique yields values that fall in the middle of the range of those published to date. Most importantly, the method is suited for the production of detailed rotation maps of the solar photosphere. It also enables the visual and quantitative identification of the north-south asymmetry in the solar differential rotation rate, when present.

Klíčová slova

Solar rotation; Solar differential rotation; Astronomical techniques; Astronomical models; Analytical mathematics; Computational methods; Direct imaging; Astrometry; Astronomical methods; Astronomy software; Astronomy data analysis; Astronomy data visualization

Autoři

HRAZDÍRA, Z.; DRUCKMÜLLER, M.; HABBAL, S.

Vydáno

23. 12. 2020

Nakladatel

IOP PUBLISHING LTD

Místo

BRISTOL

ISSN

0067-0049

Periodikum

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

Ročník

252

Číslo

1

Stát

Spojené státy americké

Strany od

1

Strany do

8

Strany počet

8

URL

https://doi.org/10.3847/1538-4365/abc702

BibTex

@article{BUT167723,
  author="Zdeněk {Hrazdíra} and Miloslav {Druckmüller} and Shadia Rifai {Habbal}",
  title="Measuring Solar Differential Rotation with an Iterative Phase Correlation Method",
  journal="ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES",
  year="2020",
  volume="252",
  number="1",
  pages="1--8",
  doi="10.3847/1538-4365/abc702",
  issn="0067-0049",
  url="https://doi.org/10.3847/1538-4365/abc702"
}