Subrahmanyan Chandrasekhar, an Indian-American astrophysicist, made significant contributions to the study of black holes and gravitational waves. His work laid the foundation for understanding the behavior of matter under extreme conditions and the formation of black holes.

The Chandrasekhar Limit, named after Subrahmanyan Chandrasekhar, is the critical mass limit for a white dwarf star. If the mass of a white dwarf exceeds this limit, it collapses under its own gravity to form a black hole.

C. V. Vishveshwara, an Indian physicist and astronomer, made significant contributions to the theory of gravitational waves. His work focused on the generation and propagation of gravitational waves in various astrophysical scenarios.

Astrosat, also known as the Indian Space Observatory, is the first Indian-led satellite mission dedicated to the study of black holes, neutron stars, and other compact objects. It carries a suite of instruments designed to observe X-rays and ultraviolet radiation from these cosmic sources.

Biman B. Nath, an Indian astrophysicist, made significant contributions to the understanding of the accretion disk around black holes. His work focused on the physics of accretion disks and the emission of radiation from these regions.

The Aryabhatta Research Institute of Observational Sciences (ARIES) is an Indian astronomical observatory located in the Himalayas. It has made significant contributions to black hole research, including the study of active galactic nuclei and the detection of gravitational waves.

B. S. Sathyaprakash, an Indian astrophysicist, played a key role in the analysis of data from the Laser Interferometer Gravitational-Wave Observatory (LIGO), which led to the first direct detection of gravitational waves in 2015.

Vijay Varma, an Indian-American astrophysicist, made significant contributions to the study of black hole mergers and the formation of gravitational waves. His work focused on understanding the dynamics and radiation emitted during these cosmic events.

Alok Laddha, an Indian astrophysicist, is known for his work on the thermodynamics of black holes and the information paradox. His research focuses on understanding the behavior of matter and information in the vicinity of black holes.

The National Centre for Radio Astrophysics (NCRA) is an Indian-led research collaboration that aims to study the properties of black holes and other compact objects using radio telescopes. It operates the Giant Metrewave Radio Telescope (GMRT), one of the world's largest radio telescopes.

Dipankar Bhattacharya, an Indian astrophysicist, made significant contributions to the study of black hole jets and their role in shaping galaxies. His work focused on understanding the physics of jet formation and propagation, and their impact on the surrounding environment.

The Indian Initiative in Gravitational-Wave Observations (IndIGO) is an Indian-led initiative that aims to build a next-generation gravitational wave observatory in India. It is a collaborative effort involving several Indian research institutions and aims to contribute to the global effort to study gravitational waves and the universe.

T. Padmanabhan, an Indian astrophysicist, is known for his work on the evolution of black holes and the formation of supermassive black holes. His research focuses on understanding the growth and properties of black holes in the universe.

The Indian X-ray Astronomy Mission (IXAM) is an Indian-led research project that aims to study the properties of black holes and other compact objects using X-ray observations. It is a collaborative effort involving several Indian research institutions and aims to contribute to the global understanding of these cosmic objects.