Back to Search
Start Over
Detectability of Population III stellar remnants as X-ray binaries from tidal captures in the local Universe.
- Source :
-
Monthly Notices of the Royal Astronomical Society . Dec2021, Vol. 508 Issue 2, p2169-2178. 10p. - Publication Year :
- 2021
-
Abstract
- We assess the feasibility of detecting the compact object remnants from Population III (Pop III) stars in nearby dense star clusters, where they become luminous again as X-ray binaries (XRBs) and tidal disruption events (TDEs) via strong tidal encounters. Analytically modelling the formation of Pop III stars, coupled with a top-heavy initial mass function predicted by numerical simulations, we derive the number of (active) Pop III XRBs and TDEs in the present-day Milky Way (MW) nuclear star cluster as |${\sim} 0.06\!-\!0.3 $| and ≲4 × 10−6, rendering any detection unlikely. The detection probability, however, can be significantly boosted when surveying all massive star clusters from the MW and neighbouring galaxy clusters. Specifically, we predict ∼1.5–6.5 and ∼40–2800 active Pop III XRBs in the MW and the Virgo Cluster, respectively. Our Pop III XRBs are dominated (|${\sim} 99{{\ \rm per\ cent}}$|) by black holes with a typical mass and luminosity of |${\sim} 45\, \rm M_{\odot }$| and |${\sim} 10^{36}\, \rm erg\, s^{-1}$|. Deep surveys of nearby (|${\lesssim} 30\!-\!300\, \rm Mpc$|) galaxy clusters for such Pop III XRBs are well within reach of next-generation X-ray telescopes, such as Athena and Lynx. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 508
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 153223690
- Full Text :
- https://doi.org/10.1093/mnras/stab2744