Possibility of direct measurement of the acceleration of the universe using 0.1 Hz band laser interferometer gravitational wave antenna in space - art. no. 221103

It may be possible to construct a laser interferometer gravitational wave a ntenna in space with h(rms) similar to 10(-27) at f similar to 0.1 Hz in th is century. Using this antenna, (1) typically 10(5) chirp signals of coales cing binary neutron stars per year may be detected with S/N similar to 10(4 ); (2) we can directly measure the acceleration of the universe by a 10 yr observation of binary neutron stars; and (3) the stochastic gravitational w aves of Omega (GW) greater than or similar to 10(-20) predicted by the infl ation may be detected by correlation analysis. Our formula for phase shift due to accelerating motion might be applied for binary sources of LISA.