Which South Indian poet and composer has a school of music where Sooryakantam  is called Chāyāvati ?
Suryakantam Suryakantam or Sooryakantam (pronounced sūryakāntam) is a rāgam in Carnatic music (musical scale of South Indian classical music). It is the 17th "melakarta" rāgam (parent scale) in the 72 "melakarta" rāgam system of Carnatic music. It is called Chāyāvati in Muthuswami Dikshitar school of Carnatic music.
Jhankaradhvani Jhankaradhvani or Jhankaradhwani (pronounced jhankāradhvani) is a rāgam in Carnatic music (musical scale of South Indian classical music). It is the 19th "Melakarta" rāgam in the 72 "melakarta" rāgam system of Carnatic music.