Talk detail

Participant	Hayama, Kazuhiro
Institution	National Astronomical Observatory of Japan - 2-21-1 Osawa - Mitaka - Tokyo - Japan

Session	GW2	Accepted		Order	Time
Talk	Poster abstract	Title	Proposed multi-messenger observation of Sco X-1 with the RXTE and LIGO-Virgo detector network
Co-authors
Abstract	We present a multi-messenger observation plan for Sco X-1, the brightest Low Mass X-ray Binaries (LMXBs), using the Rossi X-ray Timing Explorer (RXTE) and the current network of gravitational wave detectors. There are several mechanisms for producing X-ray transient events which may accompanying gravitational wave burst emission in LMXBs. One of them is a gravitational wave due to accreting mass induced crust breaking, r-mode spin-down of hybrid stars and so on. Targeting burst-like gravitational waves, we propose to analyze both RXTE and gravitational wave time-series data using search pipelines developed for gravitational wave burst detection. In this presentation, we discuss our analysis plans and possible scientific results.

Session	GW2	Accepted		Order	Time
Talk	Poster abstract	Title	Proposed multi-messenger observations of radio transients using gravitational wave telescopes and the Nasu radio telescope
Co-authors
Abstract	The Waseda Nasu pulsar observatory consists of eight 20m diameter spherical dish antennas and a 30m diameter spherical dish antenna. The telescopes are designed to detect radio transient signals and variable radio objects, and detected more than 10 events since 2004. Although the origin of these transient events is still unknown, one of potential sources is radio remnants of compact binary mergers which are prime sources of gravitational waves. The merger expects to produce significant energetic outflows, of which optimal frequency takes place 1.4GHz which is the same as the observation frequency of Nasu telescopes(Nakar and Piran, Nature 2011).During LIGO/Virgofs observations 4 events were detected. In this presentation, we report a proposal of LIGO/Virgo-Nasu analysis and discuss the strategy.

Session	AT2	Accepted		Order	Time
Talk	Poster abstract	Title	Test of scalar-tensor gravity theory from observations of gravitational wave bursts with advanced detector network
Co-authors
Abstract	We consider tests of relativistic gravity theory from observations of gravitational wave bursts. Tests of gravity theory are a fundamental physics issue, and one of the plausible alternative gravity theories is scalar-tensor theory. A significant difference between the scalar-tensor theory and general relativity is the existence of a scalar field which is connected with the gravity field with coupling parameters, and a resulting scalar gravitational wave. We present a fully implemented pipeline to detect a scalar gravitational wave and discuss constraints on the coupling parameters using simulated noise of advanced LIGO, advanced Virgo, KAGRA, and LIGO-india.