Khagol_117

| KHAG L | No. 117 - JANUARY 2019 | 02 Farewell to . . . J.N.H.S. Aditya, Post-doctoral Fellow, who left IUCAAat the end of his tenure. Bhooshan Gadre, Research Scholar, who has joined the Max-Planck Institute for Gravitational Physics, Postdam-Golm, Germany, as a Post-doctoral Fellow. LabaniMallick, Research Scholar, who has joined the Pennsylvania StateUniversity as a Post-doctoral Fellow. Welcome to . . . BariMaqbool Bhat, who has done BSc (2008), MSc (2010), MPhil (2012), and PhD (2017) degrees, all from the University of Kashmir, Srinagar. After PhD, he joined the Indian Institute of Astrophysics, Bengaluru, as a Post-doctoral Fellow (PDF) for a brief period before joining IUCAAas a PDF in October 2018. During PhD, his primary research interest was to study the X-ray irradiated accretion disc by using theoretical modelling and numerical calculations. This included studying the effects of X-ray irradiation on the outer regions of the accretion disc in low mass X-ray binaries and understanding the long term variability observed in X-ray binaries. Presently, his research interest is to study the energy dependent rapid temporal behaviour of black hole systems using theAstroSat data. Surhud More, who has joined IUCAA in July 2018 as anAssociate Professor. He obtained his PhD from the Max Planck Institute for Astronomy at the University of Heidelberg in 2009, and did post-doctoral work at the Kavli Institute for Cosmological Physics at the University of Chicago (2009 - 2012), and at the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) at the University of Tokyo (2012 - 2014). He was an Assistant Professor at Kavli IPMU during 2014 - 2018, and an Associate Professor from February 2018, before moving to IUCAA. His research focuses on cosmology, and formation and evolution of galaxies, both observationally and theoretically. Astronomical observations in the last couple of decades indicate that a large portion (~ 96%) of the energy density of the Universe is made up of two mysterious and poorly understood components: dark matter and dark energy. His research work has helped to understand the connection between the observable properties of galaxies and the dark matter clumps in which galaxies live. This has allowed the use of galaxies as shining beacons to explore the parameters that describe the dark Universe. He is a member of the Subaru Hyper Suprime-Cam Survey as well as the upcoming Large Synoptic Survey Telescope project, two ambitious projects which aim to map out dark matter in the Universe andunderstanddark energy. Professor Shetye also emphasized that these modifications have features that were not found elsewhere in the world and occur, at least in part, due to the interaction between the atmosphere and the North Indian Ocean. The structure of mountains in the lands surrounding the ocean also plays a role in influencing the interaction and determining the monsoon. Thus, the atmosphere, ocean, and land topography play a role, among other factors, in making the Indian monsoon phenomenon unlike anywhere else on the planet. The lecture endedwith a question-and-answer sessionwith the audience. After a brief historical overview of early (and incorrect) notions regarding the causes of the monsoon, he described the currently accepted theory. Themonsoons arise due to seasonal and latitudinal (with the Sun) migration of the tropical rain- bearing belt (the doldrums) that encircles the tropics year around. During the winter, the belt lies well to the south of the region covering the Indian subcontinent and the seas around it. During the summer, the belt migrates to this region. The extent of thismigration is rather large as compared to that seen over other tropical areas and is accompanied by local modifications of the rain-bearing belt.