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Configuration of Magnetic Fields in a Quiet Photosphere as Revealed by Comparing the Values of the Longitudinal Field Measured by the COG Method for Two Lines
- Authors: Mozharovsky S.G.1
-
Affiliations:
- Institute of Applied Astronomy RAS
- Issue: Vol 65, No 7 (2025)
- Pages: 1073–1082
- Section: Articles
- URL: https://journals.rcsi.science/0016-7940/article/view/376077
- DOI: https://doi.org/10.7868/S3034502225070128
- ID: 376077
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Abstract
The estimate of the longitudinal magnetic field obtained from the Hinode spectropolarimeter data will be different if it is determined in different ways. In particular, the values obtained by the Centers Of Gravity (COG) method for the Fe I λ 6301 and 6302 Å lines do not coincide. Some of the differences are due to the different inaccuracies of the COG method for each of the two lines. However, some of the differences can be explained by the fact that the response functions of these lines to changes in the magnetic field are formed at different heights. This should be accompanied by a certain morphological picture of magnetic fields. It consists in the fact that most of the magnetic configurations of the quiet photosphere are similar to each other. To a rough approximation, their structure can be compared with the structure of a sunspot — there is a central region with the strongest field, close to vertical, and slopes — an analog of penumbra, where the field weakens and / or turns to horizontal. This turn occurs at the heights of the greatest response of the Fe I λ 6301 and 6302 Å lines to changes in the magnetic field with a reversal length of about tens of kilometers.
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About the authors
S. G. Mozharovsky
Institute of Applied Astronomy RAS
Email: mozharovskys@mail.ru
Saint Petersburg, Russia
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