34th Annual Report (2021-22)

169 Physics Department, North Bengal University, Siliguri, West Bengal Coordinator: Professor B. C. Paul ResearchArea DATACentreActivities Relativistic Astrophysics, Cosmology, Compact Objects, DATA analysis of X-ray Sources, Pulsar, Non-linear Dynamics Research Scholars are engaged to Analyse X-ray Data of NASA to investigate Different Pulsars. At present Six Research Scholars are engaged in doing research using the facilities of theDATA centre. It is proposed to use ASTROSAT-data from IUCAA in coming days. ICARD organized the following webinar during pandemic 1. International Seminar on Astrophysics andCosmology (March03, 2022) The I n t e r na t i ona l Semi na r on Astrophysics and Cosmology is the first one day international seminar organized by ICARD at Physics Department, North Bengal University (NBU). The eminent cosmologists Prof. Mark Trodden (USA) delivered on “The many Incarnation of Dark Energy”, Prof. K. K. Nandi (Russia) “Gravitational Time advancement”, and from IUCAA Pune Prof. Dipankar Bhattacharyya “Science from ASTROSAT : New Results on Compact Objects”, Dr. Kanak Saha “Probing Early Galaxy Formation using ASTROSAT UV Deep Field”. The International seminar was inaugurated by Vice- Chancellor of NBU, Dr. Subires Bhattacharyya, Dean of Science Faculty Dr. Subhash Chandra Roy, Coordinator ICARD, NBU Prof. B. C. Paul, and Head, Department of Physics, Dr. P. Mali. About 192 motivated B. Sc. and M. Sc students from different universities and colleges attended the program in addition to research scholars and faculties showed interest. The ICARD made an arrangement for accommodating all via google meet as well as live you tube streaming platforms. It will give a good exposure of ¬ Seminar/Symposiums our students, Research Scholar and teachers with the active scientists. Dr. B. C. Paul coordinated the seminar with Research Fellows of the Department Sagar Dey and Anirban Chanda as secretary. 2. Prof. S. G. Ghosh, CTP Jamia Miiia University, New Delhi delivered Lecture on Shadow of Black holes (Mar 22, 2021). It was organized online and attended by students and visitors of ICARD, NBU. 3. Recent Advances in Astrophysics and Cosmology (Mar, 24-25, 2021) : There are more than 150 participants. We have arranged online platform as well as you tube live streaming so that all are accommodated in the Program. The seminar was inaugurated by the Director of IUCAA, Prof. Somak Raychaudhury and delivered a Keynote address. The invited speakers were Dr. Kanak Saha, Dr. Farook Rahaman. Profs. Murli M. Verma of Lucknow University and P. K. Sahaoo of BITS Pilani Hyderabad Campus chaired the sessions. 1. Skyrme Fluid in Anisotropic Universes with a Cosmological Constant - B. C. Paul, R. Sengupta, P. Paul and S. Ray, accepted in Pramana, A Journal of Physics (2022) 2. Cosmology in $f(R,T)$ gravity with a varying deceleration parameter, A. Chanda and B. C. Paul, IJGMMP-D-20- 00551 (2020) 3. Late time cosmology in f (R, G)-gravity with interacting fluids - B. C. Paul, A Chanda, SMaharaj, A Beesham, Class. & QuantumGrav. (2022) accepted 4. Bianchi-I anisotropic universe with Barrow holographic dark energy - B. C. Paul, B. C. Roy, A. Saha, The European Physical Journal C82, 1-7 (2022) Publicationsusing ICARDfacilities 5. Wormholes in f(R, T) – gravity with density dependent $B$ parameter in SQM – R. Deb, P. Mandal, B. C. Paul, Euro Physics J Plus (2022) 6. R\'enyi Holographic Dark Energy Models In Multidimensional Universe - A. Saha, A. Chanda, S. Dey, S. Ghosh, B C Paul, IJGMMP, 19, 2250043 (2022) 7. R e c o n s t r u c t i o n o f m o d i f i e d Gauss–Bonnet gravity for emergent universe - BC Paul, SD Maharaj, A Beesham, Int. Journal of Modern Physics D, 2250045 (2022) 8. Asymptotic linear nonlinear duality, indeterminism and mathematical intelligence - Dhurjati Prasad Datta, Chaos, Solitons and Fractals, 152 (2021) 111457 9. Renyi holographic dark energy in higher dimension Cosmology - A. Saha, S. Ghose, A. Chanda, B. C. Paul, Annals of Physics, 426, 168403 (2021) 10. Traversable wormholes in the galactic halo with MOND and non-linear equation of state - B. C. Paul, Classical and Quantum Gravity 38 (14), 145022 (2021) 11. Emergent Universe in D  4 dimensions with Dynamical Wormholes - Bikash Chandra Paul, Euro Phys. J C, 81, 776 (2021) 12. Accelerating Universe in Higher D ime n s i o n a l Sp a c e T ime - a n alternative approach - Dibyendu Panigrahi, Bikash Chandra Paul, Sujit Kumar Chatterjee, 13. Cosmological models in $R^2$ gravity with hybrid expansion law - P S Debnath and B C Paul, 14. Existence of traversable wormholes with modified gravity and non-linear equation of state - Bikash Chandra Eur. Phys. J. Plus (2021) 136:771 International Journal of Geometric Methods in Modern Physics. 18, No. 09, 2150143 (2021)