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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/036/03/0355-0374

    • Keywords

       

      Sun: coronal hole—Sun: solar wind.

    • Abstract

       

      Present study probes temporal changes in the area and radiative flux of near equatorial coronal hole associated with solar wind parameters such as wind speed, density, magnetic field and temperature. Using high temporal resolution data from SDO/AIA for the two wave-lengths 193 Å and 211 Å, area and radiative flux of coronal holes are extracted and are examined for the association with high speed solar wind parameters. We find a strong association between different parameters of coronal hole and solar wind. For both the wavelength bands, we also compute coronal hole radiative energy near the earth and it is found to be of similar order as that of solar wind energy. However, for the wavelength 193 Å, owing to almost similar magnitudes of energy emitted by coronal hole and energy due to solar wind, it is conjectured that solar wind might have originated around the same height where 193 Å line is formed in the corona.

    • Author Affiliations

       

      M. Hegde1 2 K. M. Hiremath1 Vijayakumar H. Doddamani2 Shashanka R. Gurumath3

      1. Indian Institute of Astrophysics, Bengaluru 560 034, India.
      2. Department of Physics, Bangalore University, Bengaluru 560 056, India.
      3. School of Advanced Studies, VIT University, Vellore 632 014, India.
    • Dates

       
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