Research Interests: Star Formation, Stellar Evolution, Galaxy Evolution, Space Astronomy, Big Data Analysis in Astronomy
Samyaday Choudhury earned his PhD degree from the Indian Institute of Science, Bengaluru, in 2016 under the Joint Astronomy Programme. He had carried out his PhD thesis work at the Indian Institute of Astrophysics, Bengaluru. After completing his PhD, he was a 'Lee Wonchul Postdoctoral Fellow' at Yonsei University Observatory, South Korea, and a Postdoctoral Research Fellow at Macquarie University, Australia. Prior to joining Ahmedabad University, Professor Choudhury was an ‘Evolved Star Postdoctoral Fellow’ at the Space Telescope Science Institute, USA, the operation centre for prominent NASA space observatories like the Hubble Telescope and the James Webb Space Telescope.
What is it about
As the human race continues its quest to unveil the grandeur of the Universe, answers to several fundamental questions about the evolution of galaxies and the formation of stars in them remain elusive. As a cosmic detective, Professor Choudhury proactively hunts for answers by studying galaxies in our nearby Universe, i.e. those in the vicinity of the Milky Way and in our local neighbourhood. These grand structures and celestial bodies near us are simply fossil records of the various physical processes involved in their formation and evolution events since the early phases of the Universe. Professor Choudhury is particularly interested in star forming dwarf galaxies, whose chemical and physical environments are vital proxies to star formation and galaxy evolution events in the nascent phase of the Universe. He uses multi-wavelength (ultraviolet to near-infrared) data from Big Sky Surveys and targeted observations from prominent space-based telescopes (e.g. India's AstroSat, NASA’s Hubble Telescope) and ground-based optical telescopes of the world to carry out these studies. He employs image analysis techniques, mathematical and statistical techniques, and algorithms to analyse these data, and uses physical models to interpret the associated astrophysical phenomena involved in the above processes. He has published several articles in the above domains in international journals of Astronomy and Astrophysics. Professor Choudhury leads his research projects in collaboration with some prolific research groups based in India, the USA, Europe, Australia, and South Korea.
By developing smart, robust, and versatile data analysis techniques, he has deciphered some of the global properties, like chemical enrichment maps and cluster formation history, of the most massive satellite galaxies of our Milky Way, called the Magellanic Clouds. The estimation of these properties are crucial in the context of understanding the secular evolution of these satellites and their gravitational interaction history with the Milky Way. The results have implications on our understanding of star formation history, mass accumulation, and interaction history of similar systems in our Universe (minor galaxy merger events).
Professor Choudhury aims to carry out cutting-edge research in the field of Astronomy and Astrophysics, which is in synergy with the long-term goals of the international astronomy community and relevant in the era of Mega-telescope projects (e.g. the Thirty Meter Telescope). In this fascinating era of Big Data resulting from Big Sky Surveys (e.g. Gaia survey, surveys by upcoming Large Synoptic Survey Telescope and Roman Space Telescope), next-generation space telescopes by India, and international agencies like NASA and ESA, future studies in this field necessitate problem-solving abilities from interdisciplinary fields (e.g. Big Data Analysis). He is interested in opportunities to collaborate and apply big data analysis techniques to Astronomy.
Short term and PhD projects available: To be updated soon. Please check out the personal webpage of Professor Choudhury.
Winter Semester – Foundation Programme: Module 3 of Democracy and Justice studies.