Subtracting Compact Binary Foregrounds to Search for Subdominant Gravitational-Wave Backgrounds in Next-Generation Ground-Based Observatories
ORAL
Abstract
The stochastic gravitational-wave backgrounds (SGWBs) for current detectors are dominated by binary black-hole (BBH) and binary neutron-star (BNS) coalescences. The sensitivity of current networks of gravitational-wave (GW) detectors allows only a small fraction of BBHs and BNSs to be resolved and subtracted, but previous work indicated that the situation should significantly improve with next-generation (XG) observatories. We revisit these conclusions by taking into account waveform-modeling uncertainties, updated astrophysical models, and (crucially) the full set of parameters that must be estimated to remove the resolved sources. Compared to previous studies, we find that the residual background from BBHs and BNSs is large even with XG detector networks. New data analysis methods will thus be required to observe the SGWB from cosmic supernovae or contributions from early-Universe phenomena like cosmic strings, stiff post-inflation fluids, or axion inflation.
*M.K. and B.Z. were supported by NSF Grant No. 2112699 and the Simons Foundation. E.B., M.Ç. and L.R. are supported by NSF Grants No. AST-2006538, PHY-2207502, PHY-090003 and PHY20043, and NASA Grants No. 19- ATP19-0051, 20-LPS20- 0011 and 21-ATP21-0010. M.Ç. is also supported by Johns Hopkins University through the Rowland Research Fellowship. B.S.S. is supported by NSF Grants No. AST-2006384, PHY-2012083 and PHY2207638. Part of E.B.'s and B.S.S.'s work was performed at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611. This research was supported in part by the National Science Foundation under Grant No. NSF PHY-1748958.
–
Publication: https://arxiv.org/abs/2209.01221
https://arxiv.org/abs/2209.01310
Presenters
-
Bei Zhou
- Johns Hopkins University