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Browsing by Author "Jha, Bibhuti K"

Browsing by Author "Jha, Bibhuti K"

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  • AutoTAB: Automatic Tracking Algorithm for Bipolar Magnetic Regions 
    Sreedevi, Anu; Jha, Bibhuti K; Karak, Bidya Binay; Banerjee, D (American Astronomical Society, 2023-10)
    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 ...
  • Delving into the Historical Ca II K Archive from the Kodaikanal Observatory: The Potential of the Most Recent Digitized Series 
    Chatzistergos, Theodosios; Ermolli, Ilaria; Solanki, Sami K; Krivova, Natalie A; Banerjee, D; Jha, Bibhuti K; Chatterjee, Subhamoy (Springer, 2019-10)
    Full-disc Ca II K photographic observations of the Sun carry direct information as regards the evolution of solar-plage regions for more than a century and are therefore a unique dataset for solar-activity studies. For a ...
  • Differential Rotation of the Solar Chromosphere: A Century-long Perspective from Kodaikanal Solar Observatory Ca II K Data 
    Mishra, Dibya Kirti; Routh, Srinjana; Jha, Bibhuti K; Chatzistergos, Theodosios; Basu, Judhajeet; Chatterjee, Subhamoy; Banerjee, D; Ermolli, Ilaria (American Astronomical Society, 2024-01-20)
    Chromospheric differential rotation is a key component in comprehending the atmospheric coupling between the chromosphere and the photosphere at different phases of the solar cycle. In this study, we therefore utilize the ...
  • Extending the sunspot area series from Kodaikanal Solar Observatory 
    Jha, Bibhuti K; Hegde, M; Priyadarshi, Aditya; Mandal, Sudip; Ravindra, B; Banerjee, D (Frontiers, 2022-10)
    Kodaikanal Solar Observatory (KoSO) possesses one of world's longest and homogeneous records of sunspot observations that span more than a century (1904–2017). Interestingly, these observations (originally recorded in ...
  • Measurements of solar differential rotation using the century long kodaikanal sunspot data 
    Jha, Bibhuti K; Priyadarshi, Aditya; Mandal, Sudip; Chatterjee, Subhamoy; Banerjee, D (Springer, 2021-01)
    The rotational profile of the Sun is considered to be one of the key inputs in a solar dynamo model. Hence, precise and long-term measurements of this quantity is important for our understanding of solar magnetism and its ...
  • A theoretical model of the near-surface shear layer of the Sun 
    Jha, Bibhuti K; Choudhuri, A. R (Oxford University Press on behalf of the Royal Astronomical Society, 2021-09)
    The Sun has a near-surface shear layer (NSSL), within which the angular velocity decreases rapidly with radius. We provide an explanation of this layer based on the thermal wind balance equation. Since convective motions ...

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