期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2022/02/003
关键词
cosmological parameters from LSS; power spectrum; gravitational waves; sources; supernova type Ia-standard candles
资金
- project Combining Cosmic Microwave Background and Large Scale Structure data: an Integrated Approach for Addressing Fundamental Questions in Cosmology - MIUR Progetti di Ricerca di Rilevante Interesse Nazionale (PRIN) Bando 2017 [2017YJYZAH]
- ASI Grant [2016-24-H.0]
- European Research Council [770017]
- Austrian National Science Foundation through FWF stand-alone grant [P31154-N27]
- South African Radio Astronomy Observatory (SARAO)
- National Research Foundation [75415]
The study focuses on clustering of GW merger events and SN in Luminosity Distance Space, using a modified CAMB code to evaluate power spectra and conducting a multitracer Fisher analysis. Adding SN to the GW merger dataset considerably improves the forecast by breaking significant parameter degeneracies, with detectable GW merger bias even in a single ET case.
We study the clustering of Gravitational Wave (GW) merger events and Supernovae IA (SN), as cosmic tracers in Luminosity Distance Space. We modify the publicly available CAMB code to numerically evaluate auto-and cross-power spectra for the different sources, including Luminosity Distance Space distortion effects generated by peculiar velocities and lensing convergence. We perform a multitracer Fisher analysis to forecast expected constraints on cosmological and GW bias coefficients, using outputs from hydrodynamical N-body simulations to determine the bias fiducial model and considering future observations from the Vera Rubin Observatory and Einstein Telescope (ET), both single and in a 3 detector network configuration. We find that adding SN to the GW merger dataset considerably improves the forecast, mostly by breaking significant parameter degeneracies, with final constraints comparable to those obtainable from a Euclid-like survey. GW merger bias is forecasted to be detectable with good significance even in the single ET case.
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