| |
Abstract |
We present a catalog of gravitational wave background (GWB) signal templates from cosmic-string networks, based on relevant models proposed in the literature. We classify templates as conventional, based on standard cosmology and Nambu-Goto results (VOS and BOS), and beyond conventional, based on modifications of a) the loop number density (LRS, super, metastable, current-carrying strings), b) the expansion history (nonstandard cosmologies, extra degrees of freedom, either thermal or secluded), or c) the loop properties (birth length, power emission). Using the SBI package GWBackFinder: https://github.com/AndronikiDimitriou/GWBackFinder, we quantify the reconstruction precision of each signal by LISA, scanning over their parameter space, and performing model comparisons. For conventional signals, LISA reconstructs the tension G & micro; with an error less than or similar to 10% for G & micro; >= 5 & centerdot;10-15, which decreases down to 2-3% for G & micro; >= 10-12. BOS and VOS modelings become distinguishable confidently for G & micro; >= 5 & centerdot; 10-13. For beyond-conventional signals, we identify SNR and error-threshold intervals for each parameter, and determine (for few examples) the regions where they can be distinguished from conventional signals. Analogous quality reconstruction studies of cosmic-string GWBs, superimposed over leading astrophysical foregrounds in the LISA window, will be presented in a series of upcoming papers. |
|
| |
Address |
[Dimitriou, Androniki; Figueroa, Daniel G.; Simakachorn, Peera; Zaldivar, Bryan] Univ Valencia, Inst Corpuscular Phys FIC, CSIC, UV Sci Pk,C-Catedrat Jose Beltran 2, E-J6980 Valencia, Spain, Email: androniki.dimitriou@ific.uv.es; |
|
