Khagol 120

No. 120 - October 2019 Ramkishor Sharma, who has completed BSc from the University of Delhi in 2012, MSc from Jawaharlal Nehru University, New Delhi in 2014, and PhD from the University of Delhi in 2019. He has joined IUCAA as a Post-doctoral Fellow in September 2019. His research interest lies in the general area of early universe cosmology, and he is interested in studying the primordial origin of magnetic fields and gravitational waves of cosmological origin. During his PhD, he has worked on inflationary generation of magnetic fields: both helical and non- helical, particle production via Schwinger mechanism in de Sitter spacetime. Currently, he is working on the generation of gravitational waves in the context of primordial magnetic fields generated in themodel. Ramkishor Sharma Welcome to ... Nishant K. Singh Nishant K. Singh, who has joined IUCAAin September 2019, asAssistant Professor, obtained his PhD in 2012 under the aegis of the Joint Astronomy Programme of the Indian Institute of Science, Bengaluru, and carried out the thesis work at the Raman Research Institute under the supervision of S. Sridhar. Singh did post-doctoral works at IUCAA (2012 - 2013), Nordic Institute for Theoretical Physics in Stockholm (2013 - 2016), and at the Max Planck Institute for Solar System Research in Goettingen, where he was a Max-Planck-Princeton-Center Fellow (2017 - 2019). He works in the areas of magneto-hydrodynamics, and astrophysical fluid dynamics. His current research includes, dynamo theory to understand the origin of cosmic magnetic fields; some aspects of solar physics, especially the sunspot formation and helio-seismology; and turbulent convection. He is also interested in the warm dark matter paradigmof galaxy formation. Tek Prasad Adhikari Tek Prasad Adhikari, who has completed MSc in Theoretical Physics from the Tribhuvan University, Kathmandu, Nepal in 2011. He obtained PhD degree with distinction from the Nicolaus CopernicusAstronomical Center of the PolishAcademy of Sciences (NCAC PAS) in Warsaw, Poland in 2018. During his PhD research, he was mainly involved in the study of the emission and absorption gas present in the vicinity of the super-massive black hole in the Active Galactic Nuclei (AGNs). In particular, his works have provided constraints on the density and ionization properties of emission and absorption matter in theAGN environment. Recently, his PhD thesis has been awarded with “Springer Thesis Award” by the Springer Nature Publication, Switzerland, and published as a book. After obtaining PhD, he continued working as a Post doctoral Fellow (PDF) for a year at the NCAC PAS before joining IUCAAin August 2019 as a PDF. In IUCAA, he is continuing research onAGN emission and absorption gas by using numerical techniques to model the process of photoionization operating in emitting/absorbing regions in AGN. He is interested to test his models using X-ray observations performed with instruments on board in X-ray satellites. Apart from the regular scientific works, he is also interested in studying the history of scientific developments and its popularization among the general public. 6