{"id":1331,"date":"2019-04-10T14:36:01","date_gmt":"2019-04-10T05:36:01","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?post_type=seminar&p=1331"},"modified":"2021-07-30T12:32:39","modified_gmt":"2021-07-30T03:32:39","slug":"primordial-black-hole-cosmology","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/","title":{"rendered":"Primordial Black Hole Cosmology"},"content":{"rendered":"

After aLIGO detected the gravitational wave (GW) produced by mergers of binary black holes (BHs),<\/p>\n

researchers have aggressively studied the origin of the BHs with masses of the order of O(10) M_sun. In addition to astrophysical origins through evolutions of Pop.III\/Pop.II stars,<\/p>\n

one of the attractive candidates of those BHs should be Primordial Black Holes
\n(PBHs). See M.Sasaki, T.Suyama, S.Yokoyama and T.Tanaka (arXiv:1603.08338 [astro-ph.CO]).<\/p>\n

The PBHs can be produced in the early radiation or matter dominated Universe due to spherical<\/p>\n

collapses of regions which have a large curvature perturbation produced by inflation.<\/p>\n

I will review the current status of cosmological and astrophysical constraints<\/p>\n

on PBHs with introducing my own latest bounds on PBHs in terms of<\/p>\n

polarization of Cosmic Microwave Background photons due to cosmological accretions<\/p>\n

onto PBHs (arXiv:1707.04206 [astro-ph.CO]), cosmological\/gamma-ray\/cosmicrays bounds on evaporating PBHs (arXiv:0912.5297 [astro-ph.CO]),<\/p>\n

Higgs phenomenology (arXiv:1708.02138 [hep-ph]),
\nstochastic GWs (arXiv:1903.05924 [astro-ph.CO]), dark matter (arXiv:1802.06785 [astro-ph.CO]),<\/p>\n

ultra-compact mini halo formations (arXiv:1712.08820 [astro-ph.CO]) and so on.<\/p>\n

If time permitted, I will mention the current status of concreteinflation modes based on particle physics which can successfully produce PBHs.<\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[55],"acf":{"s_now_accepting":true,"s_date_order":"2019-04-24 17:00:00","s_date_end":null,"s_date_text":"2019-04-24 17:00:00","s_text":"Kazunori Kohri (KEK\/Sokendai)","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"","s_poster":"

kohri_KMI_colloquium<\/a><\/p>","s_poster2":"

kohri_KMI_colloquium<\/a><\/p>","s_slide":""},"yoast_head":"\nPrimordial Black Hole Cosmology - KMI - Nagoya University<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Primordial Black Hole Cosmology - KMI - Nagoya University\" \/>\n<meta property=\"og:description\" content=\"After aLIGO detected the gravitational wave (GW) produced by mergers of binary black holes (BHs), researchers have aggressively studied the origin of the BHs with masses of the order of O(10) M_sun. In addition to astrophysical origins through evolutions of Pop.III\/Pop.II stars, one of the attractive candidates of those BHs should be Primordial Black Holes (PBHs). See M.Sasaki, T.Suyama, S.Yokoyama and T.Tanaka (arXiv:1603.08338 [astro-ph.CO]). The PBHs can be produced in the early radiation or matter dominated Universe due to spherical …\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/\" \/>\n<meta property=\"og:site_name\" content=\"KMI - Nagoya University\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-30T03:32:39+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/\",\"name\":\"Primordial Black Hole Cosmology - KMI - Nagoya University\",\"isPartOf\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\"},\"datePublished\":\"2019-04-10T05:36:01+00:00\",\"dateModified\":\"2021-07-30T03:32:39+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Seminars\",\"item\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Primordial Black Hole Cosmology\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/\",\"name\":\"KMI - Nagoya University\",\"description\":\"Nagoya University: Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Primordial Black Hole Cosmology - KMI - Nagoya University","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1331\/","og_locale":"en_US","og_type":"article","og_title":"Primordial Black Hole Cosmology - KMI - Nagoya University","og_description":"After aLIGO detected the gravitational wave (GW) produced by mergers of binary black holes (BHs), researchers have aggressively studied the origin of the BHs with masses of the order of O(10) M_sun. In addition to astrophysical origins through evolutions of Pop.III\/Pop.II stars, one of the attractive candidates of those BHs should be Primordial Black Holes (PBHs). See M.Sasaki, T.Suyama, S.Yokoyama and T.Tanaka (arXiv:1603.08338 [astro-ph.CO]). 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