Parameter estimation of hydraulic properties from one-step outflow data

1992 ◽  
Vol 28 (11) ◽  
pp. 3021-3028 ◽  
Author(s):  
A. F. Toorman ◽  
P. J. Wierenga ◽  
R. G. Hills
Keyword(s):  
Parameter Estimation ◽  
Hydraulic Properties ◽  
One Step

scholarly journals Simultaneously constraining the astrophysics of reionisation and the epoch of heating with 21CMMC

2017 ◽  
Vol 12 (S333) ◽  
pp. 18-21 ◽  
Author(s):  
Bradley Greig ◽  
Andrei Mesinger
Keyword(s):  
Parameter Estimation ◽  
Theoretical Analysis ◽  
Power Spectrum ◽  
Light Cone ◽  
Theoretical Modelling ◽  
Next Generation ◽  
One Step ◽  
Foreground Removal ◽  
Spectrum Amplitude

AbstractWe extend our MCMC sampler of 3D EoR simulations, 21CMMC, to perform parameter estimation directly on light-cones of the cosmic 21cm signal. This brings theoretical analysis one step closer to matching the expected 21-cm signal from next generation interferometers like HERA and the SKA. Using the light-cone version of 21CMMC, we quantify biases in the recovered astrophysical parameters obtained from the 21cm power spectrum when using the co-eval approximation to fit a mock 3D light-cone observation. While ignoring the light-cone effect does not bias the parameters under most assumptions, it can still underestimate their uncertainties. However, significant biases (∼few – 10 σ) are possible if all of the following conditions are met: (i) foreground removal is very efficient, allowing large physical scales (k ∼ 0.1 Mpc−1) to be used in the analysis; (ii) theoretical modelling is accurate to ∼10 per cent in the power spectrum amplitude; and (iii) the 21cm signal evolves rapidly (i.e. the epochs of reionisation and heating overlap significantly

Sign in / Sign up

Export Citation Format

Share Document