Conveners
Low frequency gravitational waves: sciences and detections: Friday block 1
- Jun Nian (International Centre for Theoretical Physics Asia-Pacific, University of Chinese Academy of Sciences)
- Wenbiao Han ()
Low frequency gravitational waves: sciences and detections: Friday block 2
- Wenbiao Han ()
- Jun Nian (International Centre for Theoretical Physics Asia-Pacific, University of Chinese Academy of Sciences)
Description
The Laser Interferometer Space Antenna (LISA), Taiji and TianQin will observe the low-frequency (0.1mHz-1 Hz) Gravitational Waves (GWs) in space around the middle of 2030s. The GW sources include the supermassive black holes, Galactic binaries and cosmic sources. The mHz GWs will tell us the precise image of the supermassive black holes, the structure of our Galaxy, and the evolution history of the Universe. Especially GWs in this band can test general relativity in an incredible precision and may reveal the new physics. This session will include talks of these topics: theory and physics of GW sources, waveform simulation and data analysis, testing general relativity, GW cosmology, gravity theories, detection technologies and so on.
To precisely model or solve the binary problem in general relativity is a formidable challenge for both astronomy and gravitational physics. We will provide an exact one-body approach for the conservative part of such a problem, which applies to the whole three stages of the binary merger process. It utilizes a rotating gravitational field comprising two joined patches as the background for...
I will discuss the detection of exotic compact objects, such as primordial black holes, boson stars, etc, with gravitational waves from a binary system where the mass ratio is extremely small (or large), and show that such exteme mass ratio inspirals and mini-EMRIs are ideal systems for detection of very light exotic compact objects, and that they serve as important targets for space-based and...
The purpose of this work is to study the orbital evolution under the combined effect of disk-drag and GW-emission for E/IMRIs endowed with accretion disk. We study the dependence of disk-torque and GW-torque on the orbital parameters of compact companions. We employ a semi-relativistic technique to study E/IMRI dynamics evolving under most general elliptical-orbits in the equatorial plane and...
In this work we study, within the framework of Cowling approximation, the effect of the electric charge on the gravitational wave frequency of fluid oscillation modes of strange quark stars. For this purpose, the dense matter of the stellar fluid is described by the MIT bag model equation of state (EoS), while for the electric charge profile, we consider that the electric charge density is...
The gravitational quantum field theory is a gauge formulation of the gravity dynamics based on the inhomogeneous spin gauge symmetry, which leads to the generalized Einstein equation. In order to test this theory, we linearize the dynamic equations of gravitational interaction by keeping terms up to the leading order in the dual gravigauge field. We then apply the linearized dynamic equations...
There is an open debate about whether some galactic centers (including Sgr A*) could actually be supermassive dark matter cores made of fermions with masses in the range of 60-350 keV. We discuss the possibility of pinpointing mergers of such cores using mHz gravitational waves with the forthcoming space-based interferometers and assess the consequences of the possible outcomes from the...
