fundamental plane in X-ray binary activity of external galaxies.

We construct a new catalog of extragalactic X-ray binaries (XRBs) by matching the latest Chandra source catalog with local galaxy catalogs. Our XRB catalog contains 4430 XRBs hosted by 237 galaxies within ∼130 Mpc. As XRBs dominate the X-ray activity in galaxies, the catalog enables us to study the correlations between the total X-ray luminosity of a galaxy L _X,tot, star formation rate |$\dot{\rho }_\star$|⁠ , and stellar mass M _⋆. As previously reported, L _X,tot is correlated with |$\dot{\rho }_\star$| and M _⋆. In particular, we find that there is a fundamental plane in those three parameters; |$\log L_{\rm X,tot}={38.80^{+0.09}_{-0.12}}+\log (\dot{\rho }_\star + \alpha M_\star)$|⁠ , where α = (3.36 ± 1.40) × 10⁻¹¹ yr⁻¹. In order to investigate this relation, we construct a phenomenological binary population synthesis model. We find that the high-mass XRB and low-mass XRB fraction in formed compact object binary systems is |$\sim\! 9\%$| and |${0.04}\%$|⁠ , respectively. Utilizing the latest XMM-Newton and Swift X-ray source catalog data sets, additional XRB candidates are also found, resulting in a total of 5757 XRBs hosted by 311 galaxies. [ABSTRACT FROM AUTHOR]