{"id":26915,"date":"2025-05-14T10:54:51","date_gmt":"2025-05-14T05:24:51","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=26915"},"modified":"2025-05-29T12:55:43","modified_gmt":"2025-05-29T07:25:43","slug":"active-galactic-nucleus-agn","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/active-galactic-nucleus-agn\/","title":{"rendered":"Active Galactic Nucleus (AGN)"},"content":{"rendered":"<h2>Active Galactic Nuclei (AGNs) Latest News<\/h2>\n<p>Astronomers from the Russian Academy of Sciences, using the Spektr-RG (SRG) space observatory, have detected 11 new Active Galactic Nuclei (AGNs) during their all-sky X-ray surveys.<\/p>\n<h2>What are Active Galactic Nuclei (AGNs)?<\/h2>\n<ul>\n<li><strong>Active Galactic Nuclei (AGNs)<\/strong>\u00a0are\u00a0<strong>compact regions at the centers of galaxies<\/strong>\u00a0that emit\u00a0<strong>exceptionally high levels of electromagnetic radiation<\/strong>, often outshining the rest of the galaxy.<\/li>\n<li>This intense emission arises from either\u00a0<strong>accretion of matter by a supermassive black hole<\/strong>\u00a0or\u00a0<strong>intense star formation activity<\/strong>.<\/li>\n<li>AGNs are among the\u00a0<strong>most luminous and persistent energy sources<\/strong>\u00a0in the universe and are critical to understanding\u00a0<strong>galaxy formation and evolution<\/strong>.<\/li>\n<li>The newly detected AGNs were identified during an\u00a0<strong>optical and X-ray inspection<\/strong>\u00a0of sources listed in the\u00a0<strong>ARTSS1-5 catalog<\/strong>, using\u00a0<strong>SRG\u2019s ART-XC telescope<\/strong>.<\/li>\n<li>The team has also previously identified\u00a0<strong>more than 50 AGNs<\/strong>\u00a0and several\u00a0<strong>cataclysmic variable stars<\/strong>.<\/li>\n<\/ul>\n<h3>Key Characteristics of the 11 Newly Detected AGNs<\/h3>\n<ul>\n<li>All 11 AGNs are located at\u00a0<strong>redshifts ranging from 0.028 to 0.258<\/strong>, indicating they are\u00a0<strong>relatively nearby<\/strong>\u00a0in cosmic terms.<\/li>\n<li>Their\u00a0<strong>X-ray luminosities<\/strong>\u00a0fall within the typical range of\u00a0<strong>2 to 300 \u00d7 10\u00b3\u2079 erg\/s<\/strong>, which is consistent with known AGN profiles.<\/li>\n<\/ul>\n<h3>Classification into Seyfert Types<\/h3>\n<ul>\n<li>All detected AGNs were classified as\u00a0<strong>Seyfert galaxies<\/strong>, a type of AGN that is\u00a0<strong>common and well-studied<\/strong>:\n<ul>\n<li><strong>7 galaxies<\/strong>\u00a0were classified as\u00a0<strong>Seyfert Type 1 (Sy 1)<\/strong>, characterized by\u00a0<strong>broad optical emission lines<\/strong>.<\/li>\n<li><strong>3 galaxies<\/strong>\u00a0were classified as\u00a0<strong>Seyfert Type 1.9 (Sy 1.9)<\/strong>, showing\u00a0<strong>partially broadened lines<\/strong>.<\/li>\n<li><strong>1 galaxy<\/strong>\u00a0was classified as\u00a0<strong>Seyfert Type 2 (Sy 2)<\/strong>, which exhibits\u00a0<strong>narrow emission lines<\/strong>\u00a0only.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Seyfert galaxies<\/strong>\u00a0appear like normal galaxies in visible light but show\u00a0<strong>strong infrared and X-ray emissions<\/strong>\u00a0due to activity at their cores.<\/li>\n<\/ul>\n<h2>Active Galactic Nuclei (AGNs) FAQs<\/h2>\n<p><strong>Q1:\u00a0<\/strong>What are Active Galactic Nuclei (AGNs)?<br \/>\n<strong>Ans:<\/strong>\u00a0AGNs are extremely bright central regions of some galaxies, powered by supermassive black holes accreting matter.<\/p>\n<p><strong>Q2:\u00a0<\/strong>Why are AGNs important in astrophysics?<br \/>\n<strong>Ans:<\/strong>\u00a0AGNs help scientists understand galaxy evolution, black hole activity, and cosmic energy sources across the universe.<\/p>\n<p><strong>Q3:\u00a0<\/strong>What types of AGNs are there?<br \/>\n<strong>Ans:<\/strong>\u00a0Common types include quasars, blazars, Seyfert galaxies, and radio galaxies, each emitting energy across various wavelengths.<\/p>\n<p><strong>Source:\u00a0<\/strong><a href=\"https:\/\/phys.org\/news\/2025-05-astronomers-eleven-galactic-nuclei.html\" target=\"_blank\" rel=\"nofollow noopener\">PHY<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Active Galactic Nuclei (AGNs) are compact regions at the centers of galaxies that emit exceptionally high levels of electromagnetic radiation, often outshining the rest of the galaxy.<\/p>\n","protected":false},"author":5,"featured_media":47200,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[405,21,23],"class_list":{"0":"post-26915","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-active-galactic-nucleus-agn","9":"tag-prelims-pointers","10":"tag-upsc-prelims-current-affairs","11":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/26915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=26915"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/26915\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/47200"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=26915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=26915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=26915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}