Results 1 to 10 of about 105 (95)
Large-scale horizontal flows in the solar photosphere [PDF]
Astronomy and Astrophysics, 2009 11 pages, 9 figures, 1 table; accepted in Astronomy & ...
Michal Švanda, M Sobotka
exaly +5 more sources
Superstrong Magnetic Fields in Sunspot Bipolar Light Bridges
Astrophysical Journal LettersRecent solar observations of bipolar light bridges (BLBs) in sunspots have, in a few individual cases, revealed magnetic fields up to 8.2 kG, which is at least twice as strong as typical values measured in sunspot umbrae.
J S Castellanos Duran +2 more
exaly +3 more sources
A new dynamo pattern revealed by the tilt angle of bipolar sunspot groups [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 10 pages, 16 figures.
E A Illarionov, V V Pipin
exaly +3 more sources
AutoTAB: Automatic Tracking Algorithm for Bipolar Magnetic Regions
The Astrophysical Journal Supplement Series, 2023 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 ...
Anu Sreedevi +3 more
doaj +1 more source
The Growth and Decay of Individual Sunspots and Pores
The Astrophysical JournalAn analysis of the photometric growth and decay rates of sunspots and pores was carried out. According to the Solar Dynamics Observatory/Helioseismic and Magnetic Imager data for the period 2010 May–2025 March, ≈3.5 × 10 ^5 sunspots and pores were ...
Andrei G. Tlatov
doaj +1 more source
Low-latitude Sunspot Group Tilt Angles in 15–24 Activity Cycles
The Astrophysical JournalAn analysis of the tilt angles of the active regions in 15–24 activity cycles was performed. We used data from measurements of magnetic fields in the sunspot umbra in the period 1918–2019 at the Mount Wilson Observatory, as well as the tilt angles of ...
Andrey G. Tlatov
doaj +1 more source
Differential Rotation of Individual Sunspots and Pores
The Astrophysical JournalThe analysis of the rotation rate of individual sunspots and pores was performed according to the data from the processing of observations by the Solar Dynamics Observatory/Helioseismic and Magnetic Imager in the period 2010–2024.
Andrey G. Tlatov, Kseniya A. Tlatova
doaj +1 more source
Observed Joy’s Law of Bipolar Magnetic Region Tilts at Emergence Supports the Thin Flux Tube Model
The Astrophysical Journal LettersBipolar sunspots, or more generally, bipolar magnetic regions (BMRs), are the dynamic magnetic regions that appear on the solar surface and are central to solar activity. One striking feature of these regions is that they are often tilted with respect to
Anu Sreedevi +4 more
doaj +1 more source
The Astrophysical JournalBipolar magnetic regions (BMRs) that appear on the solar photosphere are surface manifestations of the Sun’s internal magnetic field. With modern observations and continuous data streams, the study of BMRs has moved from manual sunspot catalogs to ...
Anu Sreedevi +4 more
doaj +1 more source
The Astrophysical JournalThe historical reconstruction of the Sun’s surface magnetic field remains a persistent challenge, limiting our ability to investigate the long-term global properties of the Sun, including the evolution of the large-scale magnetic field, solar cycle ...
Bibhuti Kumar Jha +3 more
doaj +1 more source