Sparse Bayesian mass mapping with uncertainties: local credible intervals
Sparse Bayesian mass mapping with uncertainties: local credible intervals
复制标题
具有不确定性的稀疏贝叶斯质量映射:局部可信区间
DOI:
10.1093/mnras/stz3453
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发表时间:
2020
影响因子:
4.8
通讯作者:
Price M
中科院分区:
文献类型:
--
作者:
Price M
Until recently, mass-mapping techniques for weak gravitational lensing convergence reconstruction have lacked a principled statistical framework upon which to quantify reconstruction uncertainties, without making strong assumptions of Gaussianity. In previous work, we presented a sparse hierarchical Bayesian formalism for convergence reconstruction that addresses this shortcoming. Here, we draw on the concept oflocal credible intervals(cf. Bayesian error bars) as an extension of the uncertainty quantification techniques previously detailed. These uncertainty quantification techniques are benchmarked against those recovered via Px-MALA – a state-of-the-art proximal Markov chain Monte Carlo (MCMC) algorithm. We find that, typically, our recovered uncertainties are everywhere conservative (never underestimate the uncertainty, yet the approximation error is bounded above), of similar magnitude and highly correlated with those recovered via Px-MALA. Moreover, we demonstrate an increase in computational efficiency ofwhen using our sparse Bayesian approach over MCMC techniques. This computational saving is critical for the application of Bayesian uncertainty quantification to large-scale stage IV surveys such as LSST andEuclid.
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影响因子:
6.4
作者:
Munshi D
通讯作者:
Munshi D
DOI:
10.1093/mnras/stab3235
发表时间:
2017
期刊:
arXiv: Cosmology and Nongalactic Astrophysics
影响因子:
--
作者:
C. Wallis;Matthew Alexander Price;J. McEwen;T. Kitching;B. Leistedt;Antoine Plouviez
通讯作者:
Antoine Plouviez
DOI:
10.3847/1538-4357/aa850d
发表时间:
2017
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Peel;F. Lanusse;Jean
通讯作者:
Jean
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
S. Pires;J. Starck;A. Amara;R. Teyssier;A. Réfrégier;J. Fadili
通讯作者:
J. Fadili
影响因子:
6.5
作者:
P. Paykari;F. Lanusse;J. Starck;F. Sureau;J. Bobin
通讯作者:
J. Bobin