Gujarat scientist’s work on black hole gets global recognition Vadodara News – Times of India

Vadodara: Work done by eminent astrophysicist and cosmologist from Gujarat Dr. Pankaj Joshi is happening global recognition.
Scientific American, one of the world’s top magazines, has published a cover story on ‘Naked Singularities’ in which Joshi’s paper is the first reference.
Earlier, in 2009, Joshi was invited by a 150-year-old American magazine to write a full article on his pioneering research. The article ‘Naked Singularities’ was published as an international cover story, translated into more than 20 international languages.
This was the first time in seven decades of independent India that any Indian scientific research was published as a cover story in a top magazine. Joshi’s work is a step ahead of Roger Penrose, who was awarded the 2021 Nobel Prize in Physics for his discovery in 1965.
Penrose’s theory was that massive collapsing stars in the universe end up in space-time singularities at the end of their lives. The result was obtained using Einstein’s theory of general relativity.
singularities are unique fireballs, where density, temperature and all physical quantities are arbitrarily and extremely high. These are unique entities in the universe not seen anywhere else, and yet the unknown laws of quantum gravity will operate there.
“Penrose always assumed that such singularities should be hidden only in the interior of blackholes. That is, they are never observed by distant observers like us. This assumption is called the ‘cosmic censorship’ hypothesis. However, it The assumption was never scientifically proven in the last several years or decades,” Joshi said of his paradigm-changing research in blackhole physics.
The work of Joshi, his team and students has shown that singularities or fireballs can exist outside blackholes. “These are also called naked or visible singularities,” Joshi said.
Joshi wrote his first paper on the subject in 1986 and then published a whole series of papers on these ‘Fireballs, Naked Singularities and Blackholes’.
This culminated in his 1993 Oxford monograph – ‘Global Aspects in Gravitational and Cosmology’ – published by Oxford University Press, his famous World War I series, the International Series of Monographs in Physics edited by renowned Nobel Prize-winning scientists.
He wrote more research papers in prestigious and top international journals, which resulted in his second research monograph – ‘Gravitational collapse and the singularity of space-time’ – published by him. Cambridge University Press , a world famous series in which Stephen Hawking also wrote his monograph.
Joshi’s article was also featured in Extreme Physics, a SciAm special issue, in which Hawking’s top 16 research stories of the decade were also written. The publication had created so much excitement that an American lawyer wrote a novel – ‘The Naked Singularity’ which has now been turned into a film.

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