Descope of the ALIA mission

摘要: The present work reports on a feasibility study commissioned by the Chinese Academy of Sciences China to explore various possible mission options detect gravitational waves in space alternative that eLISA/LISA concept. Based relative merits assigned science and technological viability, few representative descoped from ALIA are considered. A semi-analytic Monte Carlo simulation is carried out understand cosmic black hole merger histories starting intermediate mass holes at high redshift as well scientific considered probing light seed their coevolution with galaxies early Universe. indicates that, choosing armlength interferometer be three million kilometers shifting sensitivity floor around one-hundredth Hz, together very moderate improvement position noise budget, there certain capable exploring seed, binaries not readily accessible eLISA/LISA, yet requirements seem within reach next decades for China.