Marginal unbiased score expansion and application to CMB lensing
Marginal unbiased score expansion and application to CMB lensing
复制标题
边际无偏分数扩展及其在 CMB 透镜中的应用
DOI:
10.1103/physrevd.105.103531
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发表时间:
2022
影响因子:
5
通讯作者:
Seljak, Uroš
中科院分区:
文献类型:
--
作者:
Millea, Marius;Seljak, Uroš
We present the marginal unbiased score expansion (MUSE) method, an algorithm for generic high-dimensional hierarchical Bayesian inference. MUSE performs approximate marginalization over arbitrary non-Gaussian latent parameter spaces, yielding Gaussianized asymptotically unbiased and near-optimal constraints on global parameters of interest. It is computationally much cheaper than exact alternatives like Hamiltonian Monte Carlo (HMC), excelling on funnel problems which challenge HMC, and does not require any problem-specific user supervision like other approximate methods such as variational inference or many simulation-based inference methods. MUSE makes possible the first joint Bayesian estimation of the delensed Cosmic Microwave Background (CMB) power spectrum and gravitational lensing potential power spectrum, demonstrated here on a simulated data set as large as the upcoming South Pole Telescope 3Gsurvey, corresponding to a latent dimensionality ofand of order 100 global bandpower parameters. On a subset of the problem where an exact but more expensive HMC solution is feasible, we verify that MUSE yields nearly optimal results. We also demonstrate that existing spectrum-based forecasting tools which ignore pixel-masking underestimate predicted error bars by only. This method is a promising path forward for fast lensing and delensing analyses which will be necessary for future CMB experiments such as SPT-3G, Simons Observatory, or CMB-S4, and can complement or supersede existing HMC approaches. The success of MUSE on this challenging problem strengthens its case as a generic procedure for a broad class of high-dimensional inference problems.
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DOI:
10.3847/1538-4357/ac02bb
发表时间:
2021
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Millea, M.;Daley, C. M.;Chou, T-L.;Anderes, E.;Ade, P. A.;Anderson, A. J.;Austermann, J. E.;Avva, J. S.;Beall, J. A.;Bender, A. N.
通讯作者:
Bender, A. N.
影响因子:
56.9
作者:
V. Gates;.. M. L. Ludwig-M.-L.-Ludwig-2273875465;J. A. Hartsuck;T. A. Steitz;H. Muirhead;J. C. Coppola;G. N. Reeke
通讯作者:
V. Gates;.. M. L. Ludwig-M.-L.-Ludwig-2273875465;J. A. Hartsuck;T. A. Steitz;H. Muirhead;J. C. Coppola;G. N. Reeke
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Justin Alsing;B. Wandelt
通讯作者:
B. Wandelt
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
D. Green;Joel Meyers;A. V. Engelen
通讯作者:
A. V. Engelen