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Subramanyan Chandrasekar - Scientist

By DhanaLakshmi

Location : Chennai

E-mail : behindw@behindwoods.com

Subramanyan Chandrasekar, a Nobel Laureate in Physics and one of the greatest astrophysicists of modern times was born on October 19, 1910 in Lahore (Now in Pakistan) to the proud parents Chandrasekhara Subrahmanya Ayya (a Civil Servant) and Sita Balakrishnan. Being the nephew of the great C.V. Raman, a Nobel Prize winner in

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Physics, the young Chandrasekar’s interest in the subject came naturally to him.

In 1930, at the age of 19, he completed his degree in Physics from Presidency College, Chennai and flew to England for post graduation studies at the Cambridge University. He was noted for his work in Stellar Evolution, and in the early 1930’s he was the first to theorize that a collapsing massive star would become an object so dense that not even light would escape it. Now called "Black hole". He demonstrated that there is an upper limit (known as Chandrasekar Limit) to the mass of a White Dwarf Star.

His theory challenged the common scientific notion of the 1930’s that all stars, after burning up their fuel, becomes to faint, a planet sized remnants known as white dwarfs. Eventually today, the extremely dense neutron starts and black holes implied by Chandrasekar’s early work are a central part of the field of Astrophysics.

Initially his theory was rejected by peers and professional journals in England. The distinguished astronomer Sir Arthur Eddington publicly ridiculed his suggestion that stars could collapse into such objects (Black holes). Being disappointed and reluctant to engage in public debate, Chandrasekar moved to America and 1937 joined the faculty as an Assistant Professor of Astrophysics at the University of Chicago and remained there till his death.

At Chicago, he immersed himself in a personalized style of research and teaching i.e., tackling first on field of Astrophysics and then another in grater depth. He wrote books describing the result of his investigations. More than 100,000 copies of his highly technical books have been sold. He also served as an editor of the Astrophysical Journal, - the field’s leading journal for nearly 20 years. He presided over a thousand colloquia; and supervised Ph.D research for more than 50 students.

Chandrasekhar was a creative, prolific genius whose ability to combine mathematical precision with physical insight changed humanity view of Stellar Physics. 1968 in addition to his work on star degeneration, he has contributed significantly to many disparate branches of physics which includes rotational figures of equilibrium, Stellar interiors, radiative transfer of energy through the atmospheres of starts, hydro magnetic stability and many others. He won the Nobel Prize in 1983 and received 20 honorary degrees; was elected to 21 learned societies and received numerous awards. In addition to the Nobel Prize; including the Gold Medal of the Royal Astronomical Society of London. The National Medal of Science, the Rumford Medical of the American Academy of Arts and Sciences; and the Henry Draper Medal of the National Academy of Sciences.

Nasa’s premier x-ray observatory was named the Chandra X-ray observatory in his honour. Himself and his wife became American citizens in 1953. The genius passed away on August 21, 1995 in Chicago, Illinois, USA.