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How to identify the gravitational wave events from merging stellar mass black binaries like GW150914?
2016-05-31  【 】【打印】【关闭

Institute of Theoretical Physics

Chinese Academy of Sciences

 Key Laboratory of Theoretical Physics

Lunch Seminar

Title

题目

How to identify the gravitational wave events from merging stellar mass black binaries like GW150914?

Speaker

报告人

张双南研究员

Affiliation

所在单位

中国科学院高能物理研究所

Date

日期

5月31日12:00

Venue

地点

Conference Hall 322, ITP/理论物理所322报告厅

Abstract

摘要

We study how to identify the gravitational wave events from mergingstellar mass black binaries like GW150914. Methods: We briefly investigatethe possible growth and merging processes of the two stellar mass blackholes in the merging event of GW150914 detected by aLIGO, as clocked by adistant external observer, as well as the prospect of detecting theGW150914-like events using pulsar timing. Results: Our main results are: (1)The description of the black hole growth using stationary metric of apre-existing black hole is inconsistent with GW150914; (2) Onlygravitational wave radiation can be produced in the coalescence of two blackholes such as that in the GW150914 event; and (3) Pulsar timing can notdetect the GW150914-like events. Conclusions: Future high sensitivitydetections of gravitational waves from merging black holes might be used toprobe matter distribution and space-time geometry in the vicinity of thehorizon. Perhaps the GW150914-like events can be identified with traditionalastronomy observations only if the black holes are embedded in extremelydense medium before their final merge, when very strong electromagneticradiation is produced and can escape from the system.

Contact person

所内联系人

郭宗宽

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