{"id":10129,"date":"2026-05-05T15:42:47","date_gmt":"2026-05-05T10:12:47","guid":{"rendered":"https:\/\/oldweb.isical.ac.in\/~pamu\/?post_type=event&#038;p=10129"},"modified":"2026-05-05T15:46:58","modified_gmt":"2026-05-05T10:16:58","slug":"gravitational-collapse-formation-of-black-holes-and-naked-singularities","status":"publish","type":"event","link":"https:\/\/oldweb.isical.ac.in\/~pamu\/event\/gravitational-collapse-formation-of-black-holes-and-naked-singularities\/","title":{"rendered":"Gravitational Collapse: formation of black holes and naked singularities"},"content":{"rendered":"<p>In this talk, I present an overview of gravitational collapse in general relativity, focusing on the formation of black holes and naked singularities. I begin with trapped surfaces and apparent horizons, and their relation to the focusing of null geodesics through the Raychaudhuri equation. I then review the Penrose and Hawking\u2013Penrose singularity theorems, emphasizing both their implications and their limitations, particularly regarding the causal structure of singularities. I next discuss the cosmic censorship conjecture and compare homogeneous (Oppenheimer\u2013Snyder\u2013Datt) and inhomogeneous (Lema\u00eetre\u2013Tolman\u2013Bondi) collapse, illustrating how naked singularities can arise. In particular, I present Christodoulou\u2019s method showing that null geodesics can, in principle, emerge from the central singularity for an open set of initial data in spherically symmetric inhomogeneous dust collapse. Finally, I comment on non-spherical collapse and discuss possible observational signatures that could distinguish naked singularities, should they form as end states of gravitational collapse in nature.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this talk, I present an overview of gravitational collapse in general relativity, focusing on the formation of black holes and naked singularities. I begin with trapped surfaces and apparent horizons, and their relation to the focusing of null geodesics through the Raychaudhuri equation. I then review the Penrose and Hawking\u2013Penrose singularity theorems, emphasizing both [&hellip;]<\/p>\n","protected":false},"featured_media":10130,"template":"","categories":[106],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/event\/10129"}],"collection":[{"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/event"}],"about":[{"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/types\/event"}],"version-history":[{"count":2,"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/event\/10129\/revisions"}],"predecessor-version":[{"id":10133,"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/event\/10129\/revisions\/10133"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/media\/10130"}],"wp:attachment":[{"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/media?parent=10129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/categories?post=10129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oldweb.isical.ac.in\/~pamu\/wp-json\/wp\/v2\/tags?post=10129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}