34th Annual Report (2021-22)

172 Workshops/Schoolsorganized An International Conference on Cosmology & Gravity (CosmoGrav22) was successfully organized during 22-23 March 2022. The conference was inaugurated by Prof. Ajit Khembhavi. The following speakers has delivered the invited lectures during the conference: (I) Prof. Emilio Tejeda (Mexico): Choked accretion: from Bondi accretion to bipolar outflows. (ii) Dr. Umananda Dev Goswami (India): Gravitational wave physics in the light of ATGs. (iii) Prof. Phillipe Jetzer (Switzerland): Tests of GRwith LISA and ACES. (iv) Dr. Sandipan Sen Gupta (India): Extra dimension(s) of vanishing proper length: A non-Einsteinian phase in gravity and the implications for the 'darkmatter' problem. (v) Dr. Farruh Atamurotov (Uzbekistan): Black hole shadows and gravitational lensing. (vi) Prof. Alfredo Herrera Aguilar (Mexico): Black Hole rotation curves for astrophysical systems. (vii) DR. Amare Abebe (South-Africa): Linearized perturbations of a darkfluid-dominated universe. (viii) Prof. Rituparno Goswami (South- Africa): Tidal forces and Gravitational waves. (ix) Prof. Eva Hackmann (Germany): Shapiro and Frame dragging delays in pulsar timing.’ Around two hundred participants were present in this conference and twenty-five contributory papers were also presented by the young participants (mainly the Ph.D. students working in different universities in India and abroad). Some of the glimpses of this conference are mentioned in few photographs below. List of publications using ICARD facilities 1. Farruh Atamurotov, Uma Papnoi, Kimet Jusufi, Shadow and deflection angle of charged rotating black hole surrounded by perfect fluid dark matter. Class. Quantum Grav. 39 (2022) 025014 (20pp). 2. Uma Papnoi, Farruh Atamurotov, Rotating charged black hole in 4D Einstein–Gauss–Bonnet gravity: Photon motion and its shadow. Physics of Dark Universe 35 (2022), 100916. 3. Prateek Sharma, Hemwati Nandan, Uma P a p n o i , A r i n d am K uma r Chatterjee, Optical and Thermodynamic properties of a rotating dyonic black hole spacetime in N = 2 U(1)2 gauged supergravity. Eur. Phys. J. C (2021) 81:429. 4. Shubham Kala, Hemwati Nandan, Prateek Sharma, Maye Elmardi, Geodesic and Bending of Light Around a BTZ Black Hole Surrounded by Quintessential Matter Modern Physics Letters A, Vol. 36, No. 31 (2021) 2150224. 5. Shobhit Giri, Hemwati Nandan, Lokesh Kumar Joshi and Sunil D. Maharaj, Stability analysis of circular orbits around a traversable wormhole with massless conformally coupled scalar field, The European Physical Journal C 82:298, (2022). 6. Pradeep Singh, Hemwati Nandan, Lokesh Kumar Joshi, Nidhi Handa and Shobhit Giri, Stability of circular geodesics in equatorial plane of Kerr spacetime, The European Physical Journal Plus 137:263, (2022). 7. Prateek Sharma, Hemwati Nandan, Gamal G. L. Nashed, Shobhit Giri and Amare Abebe, Geodesics of a Static Charged Black Hole Spacetime in f(R) Gravity Symmetry, 14, 309; (2022). 8. Shobhit Giri, Hemwati Nandan, Lokesh Kumar Joshi and Sunil D. Maharaj, Geodesic stability and quasinormal m o d e s o f n o n - c o mm u t a t i v e Schwarzschild black hole employing Lyapunov exponent The European Physical Journal Plus 137:181, (2022). 9. Shobhit Giri, Hemwati Nandan, Lokesh Kumar Joshi and Sunil D. Maharaj, Stability analysis of circular orbits around a charged BTZ black hole s p a c e t i m e i n a n o n l i n e a r electrodynamics model via Lyapunov exponents, Modern Physics Letters A 36, 2150220, (2021). 10. Shobhit Giri and Hemwati Nandan, Stability analysis of geodesics and quasinormal modes of a dual stringy black hole via Lyapunov exponents, General Relativity and Gravitation 53 (8), (2021).