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S. Chandrasekhar

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description S. Chandrasekhar Overview

Subrahmanyan Chandrasekhar was a twentieth-century astrophysicist whose mathematical work transformed understanding of stellar structure and evolution. His best-known result, the Chandrasekhar limit, describes the maximum mass of a white dwarf supported by electron degeneracy pressure, the quantum effect that resists compression in these dense stars. Beyond that limit, this form of support cannot maintain a stable white dwarf. His research extended to black holes and the mathematical treatment of gravitation, linking the behavior of stars to the compact objects they can leave behind.

The limit remains essential to understanding stellar remnants, although exceeding it does not prescribe a single outcome in every situation. Chandrasekhar's work is relevant to astronomers and physicists studying stellar lifecycles, and to readers interested in how theoretical calculations reveal the limits of physical systems.

help S. Chandrasekhar FAQ

What is the Chandrasekhar limit?

The Chandrasekhar limit, calculated by S. Chandrasekhar in 1930, is the maximum mass (about 1.4 times the mass of our Sun) that a stable white dwarf star can have. If a star's remaining core exceeds this mass limit, it cannot support itself against gravitational collapse and will explode in a supernova or collapse into a neutron star or black hole. This principle is crucial for understanding the life cycle and death of stars.

Did S. Chandrasekhar win a Nobel Prize?

Yes, Subrahmanyan Chandrasekhar was awarded the 1983 Nobel Prize in Physics alongside William A. Fowler. The Nobel Committee honored him for his theoretical studies of the physical processes of importance to the structure and evolution of the stars. Much of the work cited by the committee was documented in his comprehensive 1939 book, "An Introduction to the Study of Stellar Structure."

Where did S. Chandrasekhar conduct most of his research?

After leaving India, Chandrasekhar spent the vast majority of his academic career at the University of Chicago. He joined the faculty in 1937 and remained there for nearly 60 years until his death in 1995. He also worked closely with the Yerkes Observatory in Wisconsin, where he made significant contributions to astrophysics.

Was there a controversy surrounding Chandrasekhar's work?

Yes, in 1935, Chandrasekhar's findings on the white dwarf mass limit were publicly mocked by the prominent British astrophysicist Sir Arthur Eddington. Eddington dismissed the idea that stars could collapse into black holes, a concept implied by the Chandrasekhar limit. This severe professional rejection delayed the acceptance of Chandrasekhar's theory for decades, though his math was eventually proven completely correct.