Astronomy Colloquium for 2017-10-04

Series: Astronomy Colloquium
Date: Wednesday 04-Oct-2017
Time: 16:05-17:00 (4:05-5:00 pm)
Location: ATL 2400
Speaker: Dr. Leo Singer (GSFC)
Title: GW170814: Accurate Localization and New Physics Enabled by A Triple Coincident GW Detection

Just two weeks after Advanced Virgo became operational, it detected its first binary black hole merger GW170814 in coincidence with the Advanced LIGO detectors at Hanford and Livingston. For the first time, the worldwide gravitational-wave detector network is able to measure GW polarization and thereby place novel constraints on alternative theories of gravity. Moreover, the addition of just one more detector and one more independent timing baseline resulted in an order of magnitude improvement in position accuracy on the sky, from over a thousand square degrees to sixty square degrees. Although no electromagnetic emission is expected in the case of this binary black hole merger event, the sub-100 square degrees localization will be typical of future triply coincident detections, whether they are binary black holes or binary neutron stars which are expected to produce copious emission across the electromagnetic spectrum. GW170814 is the prelude to a "bright" future of multimessenger observations with Advanced LIGO and Virgo.

Colloquia are usually preceded by espresso and ice cream at 1:45 pm outside room PSC 1150 and are followed by an informal reception at 5:15 pm in that room. Anyone interested in talking with the speaker, or being added to the colloquium announcement email list, should contact the colloquium organizer. Lunch will normally be reserved for the speaker to talk to graduate students.

Colloquium Organizer: Prof. L. Drake Deming


Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.


Directions and information about parking can be found here.

This page was automatically generated on: 04-Oct-2017.