{"id":200,"date":"2012-09-01T17:56:05","date_gmt":"2012-09-01T17:56:05","guid":{"rendered":"http:\/\/abergavennyas.org.uk\/?page_id=200"},"modified":"2019-12-17T19:27:25","modified_gmt":"2019-12-17T19:27:25","slug":"cosmology-3","status":"publish","type":"page","link":"http:\/\/abergavennyas.org.uk\/?page_id=200","title":{"rendered":"Cosmology"},"content":{"rendered":"

Comments, criticism (constructive only), suggestions etc contact : cosmology@AbergavennyAS.org.uk<\/a><\/em><\/p>\n

More Cosmology themed posts and items are placed in the “Cosmology” year pages.<\/p>\n

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NASA\u2019s NICER Reveals 1st-ever Pulsar Surface Map     :     posted 17th Dec., 2019<\/h5>\n

Video downloaded  from https:<\/a>\"\"<\/a>\/\/youtu.be\/zukBXehGHas<\/a>, also see NASA Goddard’s Scientific Visualization Studio at: https:\/\/svs.gsfc.nasa.gov\/13240<\/a>.  This video is public domain.<\/em><\/p>\n

Scientists have reached a new frontier in our understanding of pulsars, the dense, whirling remains of exploded stars, thanks to observations from NASA\u2019s Neutron star Interior Composition Explorer (NICER). Data from this X-ray telescope aboard the International Space Station has produced the first precise and dependable measurements of both a pulsar\u2019s size and its mass. The pulsar in question, J0030+0451 (J0030 for short), is a solitary pulsar that lies 1,100 light-years away in the constellation Pisces. While measuring the pulsar’s heft and proportions, NICER revealed that the shapes and locations of million-degree hot spots on the pulsar\u2019s surface are much stranger than generally thought. Using NICER observations from July 2017 to December 2018, two groups of scientists mapped J0030\u2019s hot spots using independent methods and converged on nearly identical results for its mass and size. One team, led by researchers at the University of Amsterdam, determined the pulsar is around 1.3 times the Sun\u2019s mass, 15.8 miles (25.4 kilometers) across and has two hot spots \u2014 one small and circular, the other long and crescent-shaped. A second team found J0030 is about 1.4 times the Sun\u2019s mass, about 16.2 miles (26 kilometers) wide and has two or three oval-shaped hot spots. All spots in all models are in the pulsar\u2019s southern hemisphere \u2014 unlike textbook images where the spots lie on opposite sides other at each magnetic poles.<\/p>\n

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 <\/p>\n","protected":false},"excerpt":{"rendered":"

Comments, criticism (constructive only), suggestions etc contact : cosmology@AbergavennyAS.org.uk More Cosmology themed posts and items are placed in the “Cosmology” year pages. NASA\u2019s NICER Reveals 1st-ever Pulsar Surface Map     :     posted 17th Dec., 2019 Video downloaded  from https:\/\/youtu.be\/zukBXehGHas, also see NASA Goddard’s Scientific Visualization Studio at: https:\/\/svs.gsfc.nasa.gov\/13240.  This video is public domain. Scientists have reached a new frontier […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":5,"comment_status":"open","ping_status":"closed","template":"","meta":{"_s2mail":"no","ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-200","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=200"}],"version-history":[{"count":60,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/200\/revisions"}],"predecessor-version":[{"id":2967,"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/200\/revisions\/2967"}],"wp:attachment":[{"href":"http:\/\/abergavennyas.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}