{"id":162600,"date":"2025-04-18T19:26:58","date_gmt":"2025-04-18T13:56:58","guid":{"rendered":"https:\/\/pwonlyias.com\/stage\/?post_type=current-affairs&#038;p=162600"},"modified":"2025-04-18T19:26:58","modified_gmt":"2025-04-18T13:56:58","slug":"discoveries-on-black-holes-by-indian-telescope","status":"publish","type":"current-affairs","link":"https:\/\/pwonlyias.com\/stage\/current-affairs\/discoveries-on-black-holes-by-indian-telescope","title":{"rendered":"Discoveries on Black Holes by Indian Telescope"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Indian scientists have successfully detected and studied an<\/span><b> Intermediate-Mass Black Hole (IMBH)<\/b><span style=\"font-weight: 400;\"> located in the faint galaxy <\/span><b>NGC 4395, about 4.3 million light-years away<\/b><span style=\"font-weight: 400;\">.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<h2><span style=\"font-size: 18pt;\"><b>Key Highlights of Discovery<\/b><\/span><\/h2>\n<ul>\n<li><span style=\"font-weight: 400;\">The discovery was made by <\/span><b>Aryabhatta Research Institute of Observational Sciences (ARIES)<\/b><span style=\"font-weight: 400;\">, an autonomous institute of the Department of Science and Technology (DST).<\/span><\/li>\n<li><b>Features of the Black Hole<\/b><\/li>\n<li style=\"list-style-type: none;\">\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">The <\/span><b>intermediate-mass black hole (IMBH)<\/b><span style=\"font-weight: 400;\"> discovered has a mass of approximately <\/span><b>22,000 times that of the Sun<\/b><span style=\"font-weight: 400;\">, making it one of the most precisely measured IMBHs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Gas clouds were found orbiting the IMBH at a distance of <\/span><b>125 light-minutes (2.25 billion km)<\/b><span style=\"font-weight: 400;\"> with a <\/span><b>velocity dispersion of 545 km\/s<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">The black hole is <\/span><b>accreting matter at just 6%<\/b><span style=\"font-weight: 400;\"> of its theoretical maximum rate, indicating a faint but active galactic nucleus.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Instruments Used:<\/b><span style=\"font-weight: 400;\"> Observations were conducted using the 3.6-metre <\/span><b>Devasthal Optical Telescope (DOT)<\/b><span style=\"font-weight: 400;\"> and the 1.3-metre <\/span><b>Devasthal Fast Optical Telescope (DFOT<\/b><span style=\"font-weight: 400;\">), equipped with the <\/span><b>Aryabhatta Devasthal Faint Object Spectrograph and Camera (ADFOSC)<\/b><span style=\"font-weight: 400;\">, an indigenously developed system for<\/span><b> photometry <\/b><span style=\"font-weight: 400;\">and <\/span><b>spectroscopy.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Technique Applied:<\/b><span style=\"font-weight: 400;\"> The team employed <\/span><b>spectrophotometric reverberation mapping<\/b><span style=\"font-weight: 400;\"> to calculate the time delay between emissions, helping determine the black hole\u2019s mass.<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-size: 18pt;\"><b>What are IMBHs?<\/b><\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Intermediate-Mass Black Holes<\/b><span style=\"font-weight: 400;\"> are black holes that lie between stellar-mass black holes (a few solar masses) and supermassive black holes (millions to billions of solar masses).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">IMBHs are expected to have masses ranging from 100 to 100,000 times the mass of the Sun.<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-size: 18pt;\"><b>Why IMBHs are Difficult to Observe<\/b><\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">IMBHs are often found in faint, low-luminosity galaxies, making them hard to detect.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Unlike supermassive black holes, IMBHs typically do not emit bright radiation unless they are actively accreting matter, which further complicates their observation.<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-size: 18pt;\"><b>Significance of Studying IMBHs<\/b><\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">IMBHs are believed to be the seeds of supermassive black holes, playing a crucial role in the evolution of galaxies and black hole formation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Finding and measuring more IMBHs is vital for filling the missing link in the black hole mass spectrum and for understanding how massive black holes grow over cosmic time.<\/span><\/li>\n<\/ul>\n<div class=\"vc_table_green\"><\/p>\n<table style=\"width: 99.7982%;\">\n<tbody>\n<tr>\n<th style=\"width: 100%; border-style: solid; border-color: #000000; background-color: rgba(184, 165, 217, 0.53); text-align: left; vertical-align: middle;\">\n<h3><span style=\"font-size: 16pt; color: #000000;\"><b>What is a Black Hole?<\/b><\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400; color: #000000;\">Black holes are extremely dense regions in space where gravity is so strong that not even light can escape their pull.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">For Example,\u00a0 <\/span><b>Cygnus X-1, one of the first discovered stellar black holes,<\/b><span style=\"font-weight: 400;\"> and<\/span><b> Sagittarius A*, <\/b><span style=\"font-weight: 400;\">the supermassive black hole at the<\/span><b> center of our Milky Way galaxy.<\/b><\/span><\/li>\n<\/ul>\n<h4><span style=\"font-size: 15pt; color: #000000;\"><b>Types of Black holes Based on Mass<\/b><\/span><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000;\"><b>Stellar-Mass Black Holes:<\/b><span style=\"font-weight: 400;\"> Formed from collapsing massive stars, with masses from a few to <\/span><b>hundreds of times that of the Sun.<\/b><\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"color: #000000;\"><span style=\"font-weight: 400;\">Many are in<\/span><b> binary systems<\/b><span style=\"font-weight: 400;\">, pulling gas from companion stars, creating X-rays.<\/span><\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000;\"><b>Supermassive Black Holes:<\/b><span style=\"font-weight: 400;\"> Found at galaxy centers, these range from hundreds of thousands to billions of solar masses, potentially formed in the early universe.<\/span><\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000;\"><b>Intermediate-Mass Black Holes:<\/b><span style=\"font-weight: 400;\"> A theorized \u201cmissing link\u201d size range from hundreds to hundreds of thousands of solar masses, hard to detect.<\/span><\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400; color: #000000;\">The recent detection of NGC 4395 Galaxy IMBH is first of its Kind.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"color: #000000;\"><b>Primordial Black Holes:<\/b><span style=\"font-weight: 400;\"> Hypothetically formed soon after the Big Bang; potentially very small or up to 100,000 solar masses<\/span><\/span><\/li>\n<\/ul>\n<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><\/div>\n<div class=\"vc_table_green\"><\/p>\n<table style=\"width: 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away.<\/p>\n","protected":false},"author":11,"featured_media":162580,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"rank_math_lock_modified_date":false,"footnotes":""},"tags":[],"paper-wise":[2089],"subject":[2092],"acf":[],"_links":{"self":[{"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/current-affairs\/162600"}],"collection":[{"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/current-affairs"}],"about":[{"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/types\/current-affairs"}],"author":[{"embeddable":true,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/comments?post=162600"}],"version-history":[{"count":2,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/current-affairs\/162600\/revisions"}],"predecessor-version":[{"id":162604,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/current-affairs\/162600\/revisions\/162604"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/media\/162580"}],"wp:attachment":[{"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/media?parent=162600"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/tags?post=162600"},{"taxonomy":"paper-wise","embeddable":true,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/paper-wise?post=162600"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/pwonlyias.com\/stage\/wp-json\/wp\/v2\/subject?post=162600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}