Black Hole High Mass X-ray Binary Microquasars at Cosmic Dawn

摘要: Theoretical models and observations suggest that primordial Stellar Black Holes (Pop-III-BHs) were prolifically formed in HMXBs, which are powerful relativistic jet sources of synchrotron radiation called Microquasars (MQs). Large populations BH-HMXB-MQs at cosmic dawn produce a smooth radio background (CRB) could account for the excess amplitude atomic hydrogen absorption z~17, recently reported by EDGES. BH-HMXB-MQs precede supernovae, neutron stars dust. promptly inject hard X-rays jets into IGM, overtake slower expanding HII regions ionized progenitor Pop-III stars, heating partially ionizing IGM over larger distance scales. BH-HMXBs channels formation Binary-Black-Holes (BBHs). The large masses BBHs detected gravitational waves, relative to BHs X-rays, high rates BBH-mergers, consistent with BH-HMXBs early universe.