Zhong Yuanhong

Relic Gravity Waves Investigation by Advanced Space-Based Gravitational Waves Detector

This paper focuses on the relic gravity waves produced during the transition from a radiation-dominated inflationary phase to a dust-dominated Friedman–Robertson–Walker-type expansion. We discuss how to investigate the spectral energy density by the latest space-based GWs detectors at f = 0.1 Hz (i.e. DECIGO). In the case of power-law and exponential inflation, we apply the cross-correlation method to the latest detector and get the time dependence of the very early Hubble parameter.

Gravitational Radiation of Binaries Coalescence into Intermediate Mass Black Holes

This paper discusses the gravitation waveforms of binaries coalescence into intermediate mass black holes (about 30 times of the solar mass). We focus on the non-spinning intermediate mass black hole located less than 100 Mpc from earth. By comparing two simulation waveforms (effective one body numerical relativity waveform (EOBNR), phenomenological waveform), we discuss the relationship between the effective distance and frequency; and through analyzing large amounts of data in event, we find that the phenomenological waveform is much smoother than EOBNR waveform, and has higher accuracy at the same effective distance.

Effects from Periastron Advance of Eccentric Binary Stars

In this paper, we discuss the coefficients of Gravitational waveform due to eccentric binaries periastron advance with evolved eccentricity. For the basic harmonic modes (n ≤ 5), the frequency split and corresponding relative strengths in the spectrum are figured out. Taking the well known binary systems PSRB 1913+16 and PSRB 1534+12 as examples, we study the dominant harmonic and its frequency split caused by periastron advance in the spectra, and give an estimation of detectability for PSRB 1913+16 and PSRB 1534+12, which are the promising targets for space observatories of gravitational wave.