A 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 $L_{X,\rm tot}$, star formation
rate $\dot{\rho}_\star$, and stellar mass $M_\star$. As previously reported,
$L_{X,\rm tot}$ is correlated with $\dot{\rho}_\star$ and $M_\star$. In
particular, we find that there is a fundamental plane in those three parameters
as $\log L_{X,\rm tot}={38.80^{+0.09}_{-0.12}}+\log(\dot{\rho}_\star + \alpha
M_\star)$, where $\alpha = {(3.36\pm1.40)\times10^{-11}}\ {\rm yr^{-1}}$. 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 ~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 5757 XRBs
hosted by 311 galaxies.
