Low-Mass X-Ray Binaries, Millisecond Radio Pulsars, and the Cosmic Star Formation Rate

摘要: We report on the implications of peak in cosmic star formation rate (SFR) at redshift z ≈ 1.5 for resulting population low-mass X-ray binaries (LMXBs) and that their descendants, millisecond radio pulsars (MRPs). Since evolutionary timescales LMXBs, progenitors, descendants are thought be significant fractions time interval between SFR present epoch, there is a lag turn-on LMXB population, with activity occurring z~0.5-1. The MRP delayed further, z0.5. show discrepancy birthrate LMXBs MRPs, found under assumption steady state SFR, can resolved as whole when effects time-variable included. A may persist short orbital periods, although detailed synthesis will required to confirm this. Furthermore, since integrated luminosity distribution normal galaxies dominated by binaries, it should strong evolution redshift. In addition an enhancement near (z 1.5) due prompt relatively short-lived massive young supernova remnants, we predict second factor ~10 ~0.5 ~1 population. Deep observations out 1 Advanced X-Ray Astrophysics Facility able observe this and, determining its shape function redshift, provide important new method constraining models binaries.