Welcome to the Laboratory of observational Gravitational Wave Physics and Astrophysics, Osaka Metropolitan University. Using the new window to the universe, gravitational wave, we study physics and astrophysics. We are involved with the Japanese gravitational wave telescope project, KAGRA, namely, the KAGRA data management and calibration as well as data analysis.
Gravitational waves are efficiently emitted by rapidly moving heavy and compact objects such as black holes and neutron stars that are gravitationally interacting with each other. As a result, gravitational waves carry information on such astronomical objects, even theory of gravitation. In September 2015, two LIGO gravitational wave telescopes, built in Hanford Washington and Livingston Louisiana, USA, detected gravitational waves due to coalescence of two black holes where mass of each component is approximately 30 solar masses. LIGO and Virgo, the European gravitational wave detector, have announced several more discoveries of astronomical gravitational wave signals since then. On 17 August 2017, LIGO and Virgo jointly detected a gravitational wave signal, called GW170817, due to a binary neutron star coalescence.
The twentieth century has seen evolutions in our understanding of the universe through new windows onto the universe: Radio, Infrared, X-ray, and Gamma-ray astronomy. Discoveries include cosmic microwave background, pulsars, quasars, super-massive black holes in cores of galaxies, stellar evolution, exoplanet, inter-galactic plasma, gamma-ray bursts, neutrino oscillation. Likewise, we can expect evolution in our views on the universe through the new window, gravitational waves astronomy. KAGRA is expected to contribute the international network of gravitational wave observatories and thereby opens up an emerging new field, gravitational wave astronomy.