ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION

We study the evolution of the photospheric magnetic field at the early stage of active region development. We use data on longitudinal component of the magnetic field and line-of-sight velocities from SOHO/MDI and SDO/HMI. The visual inspection of 48 cases of birth of active regions and the detailed...

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Main Authors:	V.M. Grigoryev, L.V. Ermakova, A.I. Khlystova
Format:	Article
Language:	English
Published:	INFRA-M 2020-12-01
Series:	Solar-Terrestrial Physics
Subjects:	magnetic field active regions
Online Access:	https://naukaru.ru/en/nauka/article/41320/view

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record_format	Article
spelling	doaj-13ab13ca8cd147d988917426f6b2cb0b2020-12-28T02:39:53ZengINFRA-M Solar-Terrestrial Physics2500-05352020-12-01643910.12737/stp-64202001ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATIONV.M. Grigoryev0L.V. Ermakova1A.I. Khlystova2Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, RussiaInstitute of Solar-Terrestrial Physics SB RAS, Irkutsk, RussiaInstitute of Solar-Terrestrial Physics SB RAS, Irkutsk, RussiaWe study the evolution of the photospheric magnetic field at the early stage of active region development. We use data on longitudinal component of the magnetic field and line-of-sight velocities from SOHO/MDI and SDO/HMI. The visual inspection of 48 cases of birth of active regions and the detailed analysis of the magnetic flux dynamics in 4 active regions have shown that at the time of emergence of a new magnetic field, the field of the following polarity is the first to be detected in the photosphere. The flux asymmetry of the leading and following polarities persists for several tens of minutes. The observed asymmetry of magnetic fluxes supports the results of the numerical simulation of emergence of the active region magnetic field in the upper layers of the convective zone, which has been carried out by Rempel and Cheung [2014].https://naukaru.ru/en/nauka/article/41320/viewmagnetic fieldactive regions
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	V.M. Grigoryev L.V. Ermakova A.I. Khlystova
spellingShingle	V.M. Grigoryev L.V. Ermakova A.I. Khlystova ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION Solar-Terrestrial Physics magnetic field active regions
author_facet	V.M. Grigoryev L.V. Ermakova A.I. Khlystova
author_sort	V.M. Grigoryev
title	ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION
title_short	ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION
title_full	ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION
title_fullStr	ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION
title_full_unstemmed	ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION
title_sort	asymmetry in occurrence of the leading and following polarities in the photospheric magnetic field at the early stage of active region formation
publisher	INFRA-M
series	Solar-Terrestrial Physics
issn	2500-0535
publishDate	2020-12-01
description	We study the evolution of the photospheric magnetic field at the early stage of active region development. We use data on longitudinal component of the magnetic field and line-of-sight velocities from SOHO/MDI and SDO/HMI. The visual inspection of 48 cases of birth of active regions and the detailed analysis of the magnetic flux dynamics in 4 active regions have shown that at the time of emergence of a new magnetic field, the field of the following polarity is the first to be detected in the photosphere. The flux asymmetry of the leading and following polarities persists for several tens of minutes. The observed asymmetry of magnetic fluxes supports the results of the numerical simulation of emergence of the active region magnetic field in the upper layers of the convective zone, which has been carried out by Rempel and Cheung [2014].
topic	magnetic field active regions
url	https://naukaru.ru/en/nauka/article/41320/view
work_keys_str_mv	AT vmgrigoryev asymmetryinoccurrenceoftheleadingandfollowingpolaritiesinthephotosphericmagneticfieldattheearlystageofactiveregionformation AT lvermakova asymmetryinoccurrenceoftheleadingandfollowingpolaritiesinthephotosphericmagneticfieldattheearlystageofactiveregionformation AT aikhlystova asymmetryinoccurrenceoftheleadingandfollowingpolaritiesinthephotosphericmagneticfieldattheearlystageofactiveregionformation
_version_	1724368903078936576

ASYMMETRY IN OCCURRENCE OF THE LEADING AND FOLLOWING POLARITIES IN THE PHOTOSPHERIC MAGNETIC FIELD AT THE EARLY STAGE OF ACTIVE REGION FORMATION

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