Ramanath Cowsik is an Indian astrophysicist and the James S. McDonnell Professor of Space Sciences at Washington University in St. Louis. He is considered by many as the father of astroparticle physics. A recipient of the Shanti Swarup Bhatnagar Prize, Cowsik was honored by the Government of India, in 2002, with the fourth highest Indian civilian award of Padma Shri
Biography
Ramanath Cowsik was born in 1940 in Nagpur, in the Western Indian state of Maharashtra. He did his schooling in Karnataka which he completed before turning 14 and graduated from Mysore University in 1958, with physics, chemistry and biology as the optional subjects, at the age of 17. He continued his master's studies at the Karnatak university in Dharwar, to secure the degree in physics in 1960, aged 19 and joined the Atomic Energy Establishment Training School, present day Homi Bhabha National Institute, Trombay where he did a post graduate course. He started his career as a member of faculty of the Tata Institute of Fundamental Research (TIFR) in 1961, simultaneously pursuing his doctoral studies to secure a PhD from Bombay University in 1968, researching under the guidance of Professor Yash Pal. He taught at TIFR for over forty years, growing over the years as a fellow, a reader, an associate professor, a professor, a senior professor, and reaching the status of a distinguished professor of the institute. He also worked as the Director of the Indian Institute of Astrophysics on deputation from TIFR, during the period from 1992 to 2003, where he has been a Vainu Bappu Distinguished Professor. On invitation from P. Buford Price, Cowsik also worked as an assistant professor at the University of California, Berkeley from 1970 to 1973.
In December 2002, he moved to Washington University in St. Louis and serves at the McDonnell Centre for the Space Sciences as the Professor of Physics and Director. He is the James S. McDonnell Professor of Space Sciences of the institute since 2013. A former research fellow of the University of Chicago, Cowsik is a visiting professor at the University of California and a visiting fellow at the Max Planck Institute for Physics and Astrophysics, Munich. He has also served as a member of the governing council of the Commission on Cosmic Rays of the International Union of Pure and Applied Physics. He is a member of the International Society for Science and Religion and sits in the board of advisors of Forgiveness Research, a community of forgiveness.
Cowsik, who is known to be proficient in languages such as Tamil, Hindi, Kannada, Sanskrit, English, German and French, is married to Sudha, a research instructor and a doctoral degree (PhD) holder, associated with the Department of Biochemistry and Molecular Biophysics of the Washington University in St. Louis. Cowsik has two sons, Sasha and Aditya, and resides in the city of St. Louis.
Legacy
Ramanath Cowsik is known for his theories related to the Big Bang origin of the universe. He argued that, post the Big Bang, gravitationally dominant relicts were formed from the particles with finite rest mass, resulting in the formation of halos of dark matter with galaxies embedded within. He postulated that this would limit the sums of masses of neutrinos, a phenomenon known in the scientific world as the Cowsik-McClelland bound. These theories are said to have explained the velocity dispersion of particles of dark matter and reproduced the luminosity profiles and ratified the rotation curves of galaxies.
Cowsik is credited with the invention of leaky box and nested leaky box models for the observation of optical and infrared wavelength bands of cosmic rays and employing these models, he is known to have established an observatory for optical astronomy in Hanle, Ladakh, at an altitude of 15,000 feet, reported to be the highest observatory in the world. The observatory is controlled remotely from Bangalore and is operational year round. He is involved in experiments related to Grand Unified Theory and attempts to probe violations of the inverse square law of gravity at sub-millimeter scales. His scientific paper on the role of neutrinos was included by the American Physical Society and the Physics Review magazine, in their selection of 1000 most important scientific papers of the century.