{"id":41524,"date":"2025-04-18T20:35:54","date_gmt":"2025-04-18T15:05:54","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=41524"},"modified":"2025-04-18T20:36:24","modified_gmt":"2025-04-18T15:06:24","slug":"intermediate-mass-black-hole-imbh","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/18-04-2025\/intermediate-mass-black-hole-imbh","title":{"rendered":"Intermediate-Mass Black Hole (IMBH)"},"content":{"rendered":"\n<p><strong>Syllabus:GS3\/Space&nbsp;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>In News<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Indian astronomers used the Devasthal Optical Telescope (DOT) to detect and measure an elusive <strong>intermediate-mass black hole (IMBH<\/strong>) in the faint galaxy <strong>NGC 4395.<\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-background\" style=\"background-color:#ebecf0\"><tbody><tr><td><strong>NGC 4395<\/strong><br>&#8211; It\u00a0 is a <strong>dwarf spiral galaxy<\/strong> located about 14 million light-years from Earth.<br>&#8211; It has a low surface brightness and is notable for being one of the closest and dimmest known<strong> Seyfert galaxies.<\/strong>\u00a0<br>1. Seyfert galaxies feature <strong>active galactic nuclei (AGNs) <\/strong>powered by supermassive black holes, which emit radiation across the electromagnetic spectrum.\u00a0<br>2. Its central black hole is around 10,000 times the mass of the Sun.\u00a0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Are Intermediate-Mass Black Holes (IMBHs)?<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>They are missing links between stellar-mass and supermassive black holes.<\/li>\n\n\n\n<li>They are believed to be seeds for the growth of supermassive black holes.<\/li>\n\n\n\n<li>IMBHs are considered to be the &#8220;<strong>seeds&#8221; that can eventually grow into supermassive black holes<\/strong>, helping explain how such giants formed in the early universe.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why Are IMBHs Hard to Detect?<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>They are difficult to observe due to their faint emissions and location in small galaxies.<\/li>\n\n\n\n<li>This makes traditional detection techniques ineffective, requiring advanced instruments and methods.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>About the Discovery\u00a0<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It provides strong evidence supporting the size-luminosity relationship in low-luminosity active galaxies and offers one of the most accurate mass estimates of an IMBH.\u00a0<\/li>\n\n\n\n<li>The black hole is accreting matter at only 6% of its theoretical maximum rate.<\/li>\n\n\n\n<li>The findings mark a key step in understanding black hole growth and evolution, with more advanced observations planned in the future.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-background\" style=\"background-color:#fff2cc\"><tbody><tr><td><strong>Do you know?<\/strong><br>&#8211; The 3.6m Devasthal Optical Telescope (DOT) was commissioned in 2016.<br>&#8211; It\u00a0 is India\u2019s largest optical telescope for studying celestial objects.<br>&#8211; It is\u00a0 located in Nainital and operated by ARIES, it is a national facility equipped with modern instruments for imaging and spectroscopy in visible and near-infrared wavelengths.<br><strong>About Black Hole<\/strong><br>&#8211; A black hole is a region in space where the gravitational pull is so strong that nothing\u2014not even light\u2014can escape from it. This immense gravity results from matter being compressed into an extremely small area.<br>&#8211; The concept of black holes was theorized by <strong>Albert Einstein in 1915<\/strong> through his <strong>General Theory of Relativity.<\/strong><br>&#8211; The<strong> term \u201cblack hole\u201d<\/strong> was later coined by <strong>John Archibald Wheeler in the 1960s.<\/strong><br>&#8211; Black holes typically form when a massive star exhausts its fuel and undergoes a supernova explosion\u2014an immense burst of energy marking the end of a star&#8217;s life. The dense core left behind can collapse into a black hole.<br><strong>Types of Black Holes<\/strong><br>&#8211; <strong>Stellar Black Holes:<\/strong><br>1. <strong>Mass:<\/strong> A few to tens of solar masses.<br>2. <strong>Origin:<\/strong> Formed when massive stars collapse after a supernova.<br><strong>Supermassive Black Holes:<\/strong><br>&#8211; <strong>Mass:<\/strong> Hundreds of thousands to billions of times the mass of the Sun.<br>&#8211; <strong>Origin: <\/strong>Thought to be formed by the merging of smaller black holes and the accretion of mass over time.<br>1. Found at the centers of most galaxies, including our own Milky Way.<br><br><img loading=\"lazy\" decoding=\"async\" width=\"610\" height=\"376\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXdo30iESJITe5D_zFmq7vQy3BtIROHz25vFFoYRVd06_pXwWtXL0q6LQB74wJwtULKFfZfVW5PxATFSZvwdx55FXPAEFVxM0K5WkzPjfFwX2xiFDspYcdMs1uMC7IhUaHsEB0fLSA?key=-__tE9usf0tL5HUFZToRKCDL\" alt=\"black hole\"><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Source: TH<\/p>\n","protected":false},"excerpt":{"rendered":"<h3><strong>In News<\/strong><\/h3>\n<li class=\"ms-5\">Indian astronomers used the Devasthal Optical Telescope (DOT) to detect and measure an elusive intermediate-mass black hole (IMBH) in the faint galaxy NGC 4395.<\/li>\n<p><\/p>\n<h3><strong>What Are Intermediate-Mass Black Holes (IMBHs)?<\/strong><\/h3>\n<li class=\"ms-5\">They are missing links between stellar-mass and supermassive black holes.<\/li>\n<li class=\"ms-5\">They are believed to be seeds for the growth of supermassive black holes.<\/li>\n<p><a href=\"https:\/\/www.nextias.com\/ca\/current-affairs\/18-04-2025\/intermediate-mass-black-hole-imbh\" class=\"btn btn-primary btn-sm float-end\">Read More<\/a><\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-41524","post","type-post","status-publish","format-standard","hentry","category-current-affairs"],"acf":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/41524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=41524"}],"version-history":[{"count":2,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/41524\/revisions"}],"predecessor-version":[{"id":41551,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/41524\/revisions\/41551"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=41524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=41524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=41524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}