%0 Generic %1 husain2021detectability %A Husain, Rabia %A Liu, Boyuan %A Bromm, Volker %D 2021 %K library %T Detectability of Population III stellar remnants as X-ray binaries from tidal captures in the local Universe %U http://arxiv.org/abs/2109.10321 %X 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 $0.06-0.3$ and $410^-6$, rendering any detection unlikely. The detection probability, however, can be significantly boosted when surveying all massive star clusters from the MW and neighboring 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 ($99\%$) by black holes with a typical mass and luminosity of $45$ $M_ødot$ and $10^36$ $erg\ s^-1$. Deep surveys of nearby ($30-300$ $Mpc$) galaxy clusters for such Pop III XRBs are well within reach of next-generation X-ray telescopes, such as ATHENA and LYNX.

@misc{husain2021detectability, 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 $\lesssim 4\times 10^{-6}$, rendering any detection unlikely. The detection probability, however, can be significantly boosted when surveying all massive star clusters from the MW and neighboring galaxy clusters. Specifically, we predict $\sim 1.5-6.5$ and $\sim 40-2800$ active Pop III XRBs in the MW and the Virgo cluster, respectively. Our Pop III XRBs are dominated ($\sim 99\%$) 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.}, added-at = {2021-09-22T06:34:18.000+0200}, author = {Husain, Rabia and Liu, Boyuan and Bromm, Volker}, biburl = {https://www.bibsonomy.org/bibtex/2485a967b6604b2cd810273083a450197/gpkulkarni}, description = {Detectability of Population III stellar remnants as X-ray binaries from tidal captures in the local Universe}, interhash = {626a7ebbc8fa93f7dffcc78650282599}, intrahash = {485a967b6604b2cd810273083a450197}, keywords = {library}, note = {cite arxiv:2109.10321}, timestamp = {2021-09-22T06:34:18.000+0200}, title = {Detectability of Population III stellar remnants as X-ray binaries from tidal captures in the local Universe}, url = {http://arxiv.org/abs/2109.10321}, year = 2021 }