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Browsing by Author "Bertello, L"

Browsing by Author "Bertello, L"

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  • An Interpretation of the Differences in the Solar Differential Rotation during Even and Odd Sunspot Cycles 
    Javaraiah, J; Bertello, L; Ulrich, R. K (The American Astronomical Society, 2005-06)
    Using the data on sunspot groups during the period 1879-2004, we have found that the solar equatorial rotation rate during the odd-numbered sunspot cycles is well correlated with the equatorial rotation rate of the preceding ...
  • Long-Term Variations in Solar Differential Rotation and Sunspot Activity 
    Javaraiah, J; Bertello, L; Ulrich, R. K (Springer, 2005-12)
    The solar equatorial rotation rate, determined from sunspot group data during the period 1879 2004, decreased over the last century, whereas the level of activity has increased considerably. The latitude gradient term of ...
  • Search for short-term periodicities in the sun's surface rotation: a revisit 
    Javaraiah, J; Ulrich, R. K; Bertello, L; Boyden, J. E (Springer Netherlands, 2009-06)
    We have used the daily values of the equatorial rotation rate determined from the Mt. Wilson daily Doppler-velocity measurements during the period 3 December 1985 – 5 March 2007 to search for periodicities in the solar ...
  • Signature of extended solar cycles as detected from Ca ii K synoptic maps of Kodaikanal and Mount Wilson Observatory 
    Chatterjee, Subhamoy; Banerjee, D; McIntosh, S.W; Leamon, Robert J; Dikpati, Mausumi; Srivastava, Abhishek K; Bertello, L (IOP Publishing, 2019-03-20)
    In recent years there has been a resurgence of the study of extended solar cycles (ESCs) through observational proxies mainly in extreme ultraviolet. But most of them are limited only to the space-based era covering only ...
  • The solar cycle 
    Javaraiah, J; Rozelot, J. P; Bertello, L (Hindawi Publishing Corporation, 2012-06)
    The Sun provides variable energetic and magnetic field input to the conditions in the heliosphere which directly affect the magnetosphere. In particular, the Sun's variable magnetic fields constitute a rich source for ...

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