34th Annual Report (2021-22)

170 Department of Physics, DDU Gorakhpur University, Gorakhpur During April 1, 2021 to March 31, 2022 Coordinator: Dr. Shantanu Rastogi done by Alka Mishra, LU. Analysis of Astrosat observations by Sanjay Pandey, LBS Gonda. Continuous monitoring of atmospheric aerosols at Gorakhpur and study of satellite data on atmospheric trace gases is being carried out by Prabhunath Prasad and ShantanuRastogi, DDUGU. 1. Special Lecture (online) on Time & Frequency Standards by Ashish Agarwal, NPL, Delhi, on the occasion of World Standards Day (14 Oct) on 20-Oct-2021 (jointly in collaborationwith Institution of Engineers, Gorakhpur Chapter). 2. Special Lecture (online) on Observations from Space by Prakash Chauhan, Director, IIRS (ISRO), Dehradun, on 8- Dec-2021. 1. ab-Initio and DFT study of HCN: Role of temperature for the formation of HCN molecule in the interstellar medium; M. Yadav, Shivani, A. Ahamad, K. K. Singh, R. Singh, A. Misra , P. Tandon; J. Mol. Struc., 1248, 2022. Lectures Publicationsusing ICARDfacilities Areaof research ¬ ¬ ¬ ¬ ¬ ¬ Infrared observations of stars Circumstellar and Interstellar Medium Molecules of Astrophysical importance Star clusters Atmospheric aerosols gases in planetary atmospheres etc. The ICARD members at Gorakhpur and surrounding areas including Varanasi and Lucknowmainlywork in the areas – Infrared observations of stars, Circumstellar and Interstellar Medium, Molecules of Astrophysical importance, Star clusters, Atmospheric aerosols, Trace gases in planetaryatmospheres etc. Amit Pathak, BHU and Shantanu Rastogi, DDUGU have studied various aspects of astrophysical infrared emission features and their possible carrier polycyclic aromatic hydrocarbon (PAH) molecules. Study of Globular Clusters is being carried out in collaboration with ARIES, Nainital by Apara Tripathi, DDUGU. Theoretical studies on chemistry of formation of pre-biotic molecules in interstellar medium are being Trace 2. Formation of aminomethanol in ammonia-water interstellar ice; K. K. Singh, P. Tandon, R. Kumar, A. Misra , Shivani, M. Yadav, A. Ahmad, M. K. Chaudhary; MNRAS, 506 (2), 2059 – 2065, 2021. 3. Theoretical study of infrared spectra of interstellar PAH molecules with N, NH, and NH2 incorporation; A, Vats, A. Pathak , T, Onaka, M. Buragohain, I. Sakon, I. Endo; Publications of the Astronomical Society of Japan, 74(1), 161–174, 2022. 4. Evidence for Coronal Temperature Variation in Seyfert 2 ESO 103–035 Using NuSTAR Observations; S. Barua, V. Jithesh, R. Misra, G. C. Dewangan, R. Sarma, A. Pathak , B. J. Medhi; ApJ, 921, 46, 2021. 5. Chemical Complexity of Phosphorous- bearing Species in Various Regions of the Interstellar Medium; M. Sil, S. Srivastav, B. Bhat, S. K. Mondal, P. Gorai, R. Ghosh, T. Shimonishi, S. K. Chakrabarti, B. Sivaraman, A. Pathak , N. Nakatani, K. Furuya, A. Das; The Astronomical Journal, 162(3), 39, 2021. 6. Conformational and vibrational spectroscopic investigation of N- Paul, Class. Quantum Grav. 38 145022 (2021) 15. Timing and spectral properties of Be/Xray pulsar 4U 1901+03 during 2019 outburst – Binay Rai and B C. Paul, Astrophysics and Space Sci., 366, 84 (2021) 16. Study of Gravastars in Rastall gravity-S. Ghosh, S. Dey, A. Das, A. Chanda, B. C. Paul Accepted in JCAP07, 004 (2021). 17. Morris-Thorne Wormholes in the modified f(R, T) gravity -Anirban Chanda, Sagar Dey, Bikash Chandra Paul, General Relativity and Gravitation , 53, 782021) 18. Comprehensive broadband study of accreting neutron stars with Suzaku Is there a bi-modality in the X-ray spectrum ? - P. Pradhan (MIT, USA), B. Paul, E. Bozzo (Univ. of Geneva), C. Maitra (Germany), B. C. Paul, Mon. Notice Royal Astronomical Society (MNRAS) 502, 1163-1190 (2021) 19. Compacy Objects in f(R,T) gravity in Finch-Skea geometry - S. Dey, A. Chanda, B. C. Paul, Euro. Phys. J Plus, 136, 228 (2021) 20. Bouncing scenario with causal cosmology - P S Debnath and B C Paul, Astrophysics and Space Science, 366, 32 (2021) 21. Gravitational collapse of Anisotropic star - S. Das, B. C. Paul, R. Sharma, Indian Journal of Physics 95 (12), 2873- 2883 (2021) 22. Existence of Traversable Wormholes with Modified Gravity and Non-linear Equation of State – B. C. Paul, Class. QuantumGrav. 38 145022 (2021). 23. Gravitational collapse of Anisotropic star - S. Das, B. C. Paul, R. Sharma, Indian Journal of Physics 95 (12), 2873- 2883 (2021)