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AutoTAB: Automatic Tracking Algorithm for Bipolar Magnetic Regions

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dc.contributor.author Sreedevi, Anu
dc.contributor.author Jha, Bibhuti K
dc.contributor.author Karak, Bidya Binay
dc.contributor.author Banerjee, D
dc.date.accessioned 2024-01-04T05:18:52Z
dc.date.available 2024-01-04T05:18:52Z
dc.date.issued 2023-10
dc.identifier.citation The Astrophysical Journal Supplement Series, Vol. 268, No. 2, 58 en_US
dc.identifier.issn 0067-0049
dc.identifier.uri http://hdl.handle.net/2248/8303
dc.description Open Access en_US
dc.description Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
dc.description.abstract Bipolar magnetic regions (BMRs) provide crucial information about solar magnetism. They exhibit varying morphology and magnetic properties throughout their lifetime, and studying these properties can provide valuable insights into the workings of the solar dynamo. The majority of previous studies have counted every detected BMR as a new one and have not been able to study the full life history of each BMR. To address this issue, we have developed Automatic Tracking Algorithm for BMRs (AutoTAB) that tracks the BMRs for their entire lifetime or throughout their disk passage. AutoTAB uses the binary maps of detected BMRs and their overlapping criterion to automatically track the regions. In this first article of this project, we provide a detailed description of the working of the algorithm and evaluate its strengths and weaknesses by comparing it with existing algorithms. AutoTAB excels in tracking even for the small BMRs (with a flux of ∼1020 Mx), and it has successfully tracked 9152 BMRs over the last two solar cycles (1996–2020), providing a comprehensive data set that depicts the evolution of various properties for each BMR. The tracked BMRs exhibit the well-known butterfly diagram and 11 yr solar cycle variation, except for small BMRs, which appear at all phases of the solar cycle and show a weak latitudinal dependence. Finally, we discuss the possibility of adapting our algorithm to other data sets and expanding the technique to track other solar features in the future. en_US
dc.language.iso en en_US
dc.publisher American Astronomical Society en_US
dc.relation.uri https://doi.org/10.3847/1538-4365/acec47
dc.rights © 2023. The Author(s)
dc.subject Solar magnetic fields en_US
dc.subject Solar active regions en_US
dc.subject Sunspots en_US
dc.subject Bipolar sunspot groups en_US
dc.subject Solar cycle en_US
dc.subject Solar magnetic flux emergence en_US
dc.subject Sunspot groups en_US
dc.subject Sunspot cycle en_US
dc.title AutoTAB: Automatic Tracking Algorithm for Bipolar Magnetic Regions en_US
dc.type Article en_US


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