{"id":13051,"date":"2024-04-16T14:48:16","date_gmt":"2024-04-17T00:48:16","guid":{"rendered":"https:\/\/www.eaobservatory.org\/jcmt\/?page_id=13051"},"modified":"2024-04-16T15:00:13","modified_gmt":"2024-04-17T01:00:13","slug":"2024-seminars","status":"publish","type":"page","link":"https:\/\/www.eaobservatory.org\/jcmt\/science\/seminars\/2024-seminars\/","title":{"rendered":"2024 Seminars"},"content":{"rendered":"<p>This page lists the Seminars that were given virtually on zoom in 2024. The EAO staff would like to thank all guest speakers and encourage new astronomers\/instrument specialists to give virtual talks..<\/p>\n<h3>April 9th, 14:00 (HST)<\/h3>\n<p>Speaker: <strong>Yutaro Kofuji (Univerisy of Tokyo)<br \/>\n<\/strong><\/p>\n<div>Title: Ultra-wide-band VERA observation of Sgr A*<br \/>\nAbstract:<br \/>\nWe present the results of the monitor observation of Sgr A* at 43 GHz using the Japanese VLBI, VERA. With the recent update, VERA has an expanded bandwidth of 2048 MHz. Our high-sensitivity observations enabled us to detect the signature of non-zero closure phases in the triangle with the longest baseline, which could be attributed to the refractive scattering effect. We also confirmed the observed and intrinsic size of Sgr A* did not significantly change from 2018 to 2020. Based on our findings, we discuss potential ways to constrain the scattering properties using this data.<\/div>\n<div><\/div>\n<div>\n<div style=\"width: 830px;\" class=\"wp-video\"><!--[if lt IE 9]><script>document.createElement('video');<\/script><![endif]-->\n<video class=\"wp-video-shortcode\" id=\"video-13051-1\" width=\"830\" height=\"484\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"http:\/\/www.eaobservatory.org\/jcmt\/wp-content\/uploads\/sites\/2\/2024\/04\/video1116985773.mp4?_=1\" \/><a href=\"http:\/\/www.eaobservatory.org\/jcmt\/wp-content\/uploads\/sites\/2\/2024\/04\/video1116985773.mp4\">http:\/\/www.eaobservatory.org\/jcmt\/wp-content\/uploads\/sites\/2\/2024\/04\/video1116985773.mp4<\/a><\/video><\/div>\n<\/div>\n<div><\/div>\n<div>\n<h3>April 9th, 14:00 (HST)<\/h3>\n<p>Speaker: <strong>Wu Jiang (SHAO)<br \/>\n<\/strong><\/p>\n<div><b>Title:<\/b>Simultaneous multifrequency observing system for (sub)mm-VLBI.<\/div>\n<div><b>Abstract:<\/b><\/div>\n<div>The simultaneous multifrequency receiving technique has been demonstrated to have great advantages for mm-VLBI observations. I will report some successful experiments with this technique, such as the detections of 3mm VLBI cores of LLAGNs M81*, M84*, M104*, and NGC4261, as well as positioning the black hole M87*. I will also present it works as a promising technique for supermassive black hole binaries and more supermassive black hole shadows.<\/div>\n<div><\/div>\n<\/div>\n<div style=\"width: 830px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-13051-2\" width=\"830\" height=\"519\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"http:\/\/www.eaobservatory.org\/jcmt\/wp-content\/uploads\/sites\/2\/2024\/04\/video1530240279.mp4?_=2\" \/><a href=\"http:\/\/www.eaobservatory.org\/jcmt\/wp-content\/uploads\/sites\/2\/2024\/04\/video1530240279.mp4\">http:\/\/www.eaobservatory.org\/jcmt\/wp-content\/uploads\/sites\/2\/2024\/04\/video1530240279.mp4<\/a><\/video><\/div>\n","protected":false},"excerpt":{"rendered":"<p>This page lists the Seminars that were given virtually on zoom in 2024. The EAO staff would like to thank all guest speakers and encourage new astronomers\/instrument specialists to give virtual talks.. April 9th, 14:00 (HST) Speaker: Yutaro Kofuji (Univerisy of Tokyo) Title: Ultra-wide-band VERA observation of Sgr A* Abstract:\u2026 <a class=\"continue-reading-link\" href=\"https:\/\/www.eaobservatory.org\/jcmt\/science\/seminars\/2024-seminars\/\">Continue reading<\/a><\/p>\n","protected":false},"author":88,"featured_media":0,"parent":1433,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/13051"}],"collection":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/users\/88"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/comments?post=13051"}],"version-history":[{"count":4,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/13051\/revisions"}],"predecessor-version":[{"id":13057,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/13051\/revisions\/13057"}],"up":[{"embeddable":true,"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/pages\/1433"}],"wp:attachment":[{"href":"https:\/\/www.eaobservatory.org\/jcmt\/wp-json\/wp\/v2\/media?parent=13051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}