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VLA Observations of Angular Broadening Close to the Sun

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Abstract

We present synthesis imaging of scatter-broadening of radio sources carried out using the Very Large Array (VLA) at six radio frequencies during the period of solar minimum. Three compact radio sources were observed from 2 to 16 solar radii around the sun. The data indicate highly anisotropic scattering. The scatter-broadening was estimated from the area of the scattered image and was found to be factor of two lower and orientation of magnetic fields was closer to the radial direction. Present observations confirm the variation of scatter-broadening with solar elongation.

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Authors and Affiliations

  1. NCRA, TIFR, Pune, 411007, India

    Pradeep Gothoskar & A.P. Rao

  2. RRI, Bangalore, 560080, India

    K.R. Anantharamahaia

  3. NRAO, U.S.A

    Ketan Desai

Authors
  1. Pradeep Gothoskar
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  2. K.R. Anantharamahaia
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  3. Ketan Desai
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  4. A.P. Rao
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Gothoskar, P., Anantharamahaia, K., Desai, K. et al. VLA Observations of Angular Broadening Close to the Sun. Astrophysics and Space Science 278, 193–196 (2001). https://doi.org/10.1023/A:1013110930964

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  • DOI: https://doi.org/10.1023/A:1013110930964

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