Seminars
The UHH Research Park includes the headquarters for the East Asian Observatory, the Caltech Submillimeter Observatory, Subaru, Gemini, UKIRT, the Smithsonian Submillimeter Array and the Institute for Astronomy, plus the astronomers at the University of Hawaii at Hilo. We are one of the major centres for astronomy in the world and encourage all visitors to the JCMT to take advantage of the proximity of these institutes, and give a seminar while in Hilo. Your talk will be advertised at each of the above institutes.
Upcoming Seminar:
5/20
Title: Dense Clumps and Embedded Clusters: Toward an Evolutionary Picture of Cluster Formation
Speaker: Tomomi Shimoikura (Otsuma Women’s University)
Abstract:
Stars often form in clusters embedded in dense molecular clumps, but the connection between the dense gas and the resulting clusters is not straightforward. In particular, some massive, dense clumps actively form clusters, while others with apparently similar properties are much less active. In this talk, I will present a statistical study of nearby cluster-forming regions, combining Nobeyama 45 m molecular line observations with stellar density maps. By classifying each clump-cluster system into four types based on the spatial relation between gas and stars, we obtain an empirical evolutionary sequence from gas-dominated to star-dominated stages. I will then focus on the “active” Type 2 clumps, which show large line widths and characteristic two-component features in C18O position-velocity diagrams that can be explained by global infall combined with rotation. Finally, I will discuss chemical constraints from early- and late-type molecules, and show how environment, dynamics, and chemistry together point toward a clump-scale evolutionary picture of cluster formation.
Date:
Hawaii: Wednesday, May 20 at 4:00 PM
Vietnam & Thailand: Thursday, May 21 at 9:00 AM
Taiwan & China: Thursday, May 21 at 10:00 AM
Japan & Korea: Thursday, May 21 at 11:00 AM
Please use this
link to mark this event on your calendar.
Please use the Zoom link to join this seminar:
Meeting ID: 865 4202 9289
Passcode: 565482
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5/27
Title: VLBI Astrometry of Radio Stars in the Gaia Era
Speaker: Pengfei Jiang (Xinjiang Astronomical Observatory)
Abstract:
Very Long Baseline Interferometry (VLBI) provides the highest precision in radio astrometry, serving as an indispensable tool for characterizing radio stars. Its sub-milliarcsecond resolution enables the meticulous tracking of stellar positions, parallaxes, and proper motions, assisting in the revision of our knowledge of the physical parameters of radio-emitting stars. The advent of the Gaia mission has further revolutionized this field by enabling high-precision alignment between radio and optical observations, thereby opening new avenues for the multi-wavelength analysis of radio stars. In this report, we evaluate the current status of the radio-optical reference frame link, detail the methodologies for achieving high-precision VLBI astrometry, and explore the promising prospects of the synergy between VLBI and Gaia in radio star research.
Date:
Hawaii: Wednesday, May 27 at 4:00 PM
Vietnam & Thailand: Thursday, May 28 at 9:00 AM
Taiwan & China: Thursday, May 28 at 10:00 AM
Japan & Korea: Thursday, May 28 at 11:00 AM
Please use this
link to mark this event on your calendar.
Please use the Zoom link to join this seminar:
Meeting ID: 889 1645 6394
Passcode: 006672
Where and How:
EAO seminars are (usually) held in the second floor conference room at the East Asia Observatory, 660 N. A’ohoku Place, Hilo, Hawaii. Please note that access to EAO is possible only through the main entrance (through the side doors facing Subaru). However since COVID we encourage astronomers to join via zoom.
We stream all of our seminars through the Zoom video conferencing application. If you would like to view the seminar via Zoom, links are sent out on the seminar mailing list (see below) or you may contact the helpdesk in advance of the talk and we will make sure that the option is available to you.
A full list of past seminar speakers can be found below for the current and previous years. These pages also contain links to PDF copies of the seminar slides, video recordings of the seminars, and other materials, when available.
To join the Seminar e-mail list:
EAO Seminars are sent out via eaoseminar@eaobservatory.org. If you wish to join this seminar list please send an e-mail to helpdesk@eaobservatory.org.
