{"id":267,"date":"2012-10-25T19:33:09","date_gmt":"2012-10-26T01:33:09","guid":{"rendered":"http:\/\/www.jetpen.com\/blog\/?p=267"},"modified":"2023-01-29T23:08:45","modified_gmt":"2023-01-30T05:08:45","slug":"the-shape-of-a-galaxy-and-its-black-hole","status":"publish","type":"post","link":"https:\/\/www.jetpen.com\/blog\/2012\/10\/25\/the-shape-of-a-galaxy-and-its-black-hole\/","title":{"rendered":"the shape of a galaxy and its black hole"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I was reading this article: <a href=\"http:\/\/www.universetoday.com\/98191\/swarm-of-black-holes-puff-up-whopper-of-a-galaxy\/\">Stirred, Not Shaken. Black Hole Antics Puff Up Whopper of a Galaxy<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Articles like this make me wonder whether the shape of a galaxy reflects the influences (gravity, spin, active\/inactive) of the central black hole or lack thereof. Maybe a black hole with a mass and spin (moment of inertia) above a certain threshold causes a galaxy to become more spiral. Maybe if it spins with a wobble, the spiral develops a central bar. Maybe if the black hole has a moment of inertia that is below a certain threshold in proportion to the rest if the galaxy&#8217;s mass, the galaxy becomes elliptical.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thoughts return to the weird relationship between the surface area of the black hole&#8217;s event horizon (not an existent, since &#8220;it&#8221; has no energy) to its entropy. Since entropy is a measure of information, the black hole behaves like a hologram. It again leads one to wonder whether the shape of the galaxy is a reflection of the information that is contained in the black hole.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I was reading this article: Stirred, Not Shaken. Black Hole Antics Puff Up Whopper of a Galaxy. Articles like this make me wonder whether the shape of a galaxy reflects the influences (gravity, spin, active\/inactive) of the central black hole or lack thereof. Maybe a black hole with a mass and spin (moment of inertia) &hellip; <a href=\"https:\/\/www.jetpen.com\/blog\/2012\/10\/25\/the-shape-of-a-galaxy-and-its-black-hole\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">the shape of a galaxy and its black hole<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2062,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[2],"tags":[20],"class_list":["post-267","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-cosmology"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.jetpen.com\/blog\/wp-content\/uploads\/2012\/10\/MwxYj08kJTMPpKz8GoXa-1-pewil.jpg","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8eKak-4j","jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/posts\/267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/comments?post=267"}],"version-history":[{"count":1,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/posts\/267\/revisions"}],"predecessor-version":[{"id":2453,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/posts\/267\/revisions\/2453"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/media\/2062"}],"wp:attachment":[{"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/media?parent=267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/categories?post=267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jetpen.com\/blog\/wp-json\/wp\/v2\/tags?post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}