Probing Massive Black Hole Binary Populations with LISA
Abstract
ESA and NASA are moving forward with plans to launch LISA around 2034. With data from the Illustris cosmological simulation, we provide analysis of LISA detection rates accompanied by characterization of the merging massive black hole population. Massive black holes of total mass $\sim10^510^{10} M_\odot$ are the focus of this study. We evolve Illustris massive black hole mergers, which form at separations on the order of the simulation resolution ($\sim$kpc scales), through coalescence with two different treatments for the binary massive black hole evolutionary process. The coalescence times of the population, as well as physical properties of the black holes, form a statistical basis for each evolutionary treatment. From these bases, we Monte Carlo synthesize many realizations of the merging massive black hole population to build mock LISA detection catalogs. We analyze how our massive black hole binary evolutionary models affect detection rates and the associated parameter distributions measured by LISA. Additionally, we evaluate the impact of the lowfrequency shape of the LISA sensitivity curve on the measurements of our massive black hole binary population. With our models and two LISA detector configurations, we find MBH binary detection rates with LISA of $\sim0.51$ yr$^{1}$ for massive black holes with masses greater than $10^5M_\odot$. We suggest reasons why we predict lower detection rates compared to much of the literature.
 Publication:

arXiv eprints
 Pub Date:
 August 2019
 arXiv:
 arXiv:1908.05779
 Bibcode:
 2019arXiv190805779K
 Keywords:

 Astrophysics  High Energy Astrophysical Phenomena;
 Astrophysics  Astrophysics of Galaxies;
 General Relativity and Quantum Cosmology
 EPrint:
 18 pages, 9 figures, 3 tables