Bounding greybody and deflection angle of improved Schwarzschild black hole

Wajiha Javed, Muhammad Aqib, Ali Övgün

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this paper, we study the weak deflection angle in the spacetime of improved Schwarzschild black hole using the method derived by Gibbons and Werner. To do so, we derive the optical curvature from the optical metric and calculate deflection angle in weak field limits by using the Gauss–Bonnet theorem. Moreover, we study the effect of the plasma medium on the weak gravitational lensing using the Gauss–Bonnet theorem. Furthermore, we also study the graphical analysis of the deflection angle in both the plasma and non-plasma mediums. Moreover, we obtain the bound on greybody for improved Schwarzschild black hole.

Original languageEnglish
Article number101827
JournalNew Astronomy
StatePublished - Oct 2022
Externally publishedYes


  • Gauss–Bonnet theorem
  • General relativity
  • Greybody factor
  • Improved Schwarzschild black hole
  • Plasma medium


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