Visible Emission Line Coronagraph

Source:  New Indian Express

 Context: Scientists from the Indian Institute of Astrophysics (IIA) in Bengaluru have reported initial significant observations from the Visible Emission Line Coronagraph (VELC) onboard ADITYA-L1, India’s first solar mission launched by ISRO.

About Recent Observation:

  • The VELC on ADITYA-L1 successfully captured and precisely estimated the onset time of a Coronal Mass Ejection (CME) that erupted from the Sun on July 16, marking the first scientific result from India’s solar mission.
  • The VELC’s unique capabilities allowed scientists to observe the CME close to the Sun’s surface, a breakthrough as such observations are typically visible only at a greater distance from the Sun.

About Visible Emission Line Coronagraph (VELC) on ADITYA-L1:

  • Purpose: To observe the solar corona and study Coronal Mass Ejections (CMEs) and the solar wind.
  • Structure: Comprises a coronagraph, spectrograph, polarimetry module, and detectors with auxiliary optics.
  • Capabilities: Enables simultaneous imaging, spectroscopy, and spectro-polarimetry near the Sun’s surface.
  • Built by: Indian Institute of Astrophysics (IIA), CREST campus, Hosakote, Karnataka, in collaboration with ISRO.
  • Functionality: Offers continuous monitoring of the solar corona, providing critical data for understanding solar activities and modeling CMEs, especially as the Sun reaches the peak of Solar Cycle 25.

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