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:
Title: Toward a Unified Interpretation of Magnetic Field Observations in Molecular Clouds
Speaker: Hua Bai Li (The Chinese University of Hong Kong)
Abstract:
Magnetic fields in molecular clouds are probed by only two robust observational tracers—submillimeter polarimetry and Zeeman measurements. Yet, after decades of work, there is still no unified interpretation. The literature continues to offer every possible combination of conclusions: turbulence can be either super- or sub-Alfvénic, and clouds can be either magnetically super- or sub-critical, depending on the model one prefers.
This persistent confusion does not arise from a lack of data, but from a failure to take the data seriously. When simulations disagree with observations, the discrepancy is too often resolved by dismissing the observations rather than questioning the models. While measurements can certainly be imperfect, disagreement with theory alone is not evidence that the observations are wrong.
In this talk, I will argue that the observational picture is far more coherent than commonly assumed. I will first distill the key, and often overlooked, constraints from submillimeter polarimetry and Zeeman observations. I will then present a numerical model that simultaneously reproduces the full set of observational signatures—demonstrating that a unified interpretation is not only possible, but already within reach.
Date:
Hawaii: Monday, July 13 at 4:00 PM
Vietnam & Thailand: Tuesday, July 14 at 9:00 AM
Taiwan & China: Tuesday, July 14 at 10:00 AM
Japan & Korea: Tuesday, July 14 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: 831 3509 9189
Passcode: 449509
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.
