3DEX: Fast Fourier-Bessel Decomposition of Spherical 3D Surv

Discussion topics for individual codes
Post Reply
User avatar
Guardian of the Codes
Posts: 1135
Joined: Wed Aug 04, 2004 4:18 pm
Location: Washington, DC

3DEX: Fast Fourier-Bessel Decomposition of Spherical 3D Surveys

Post by owlice » Sat Nov 26, 2011 4:00 pm

[c]3DEX: Fast Fourier-Bessel Decomposition of Spherical 3D Surveys[/c][/b]
Abstract: High precision cosmology requires analysis of large scale surveys in 3D spherical coordinates, i.e. Fourier-Bessel decomposition. Current methods are insufficient for future data-sets from wide-field cosmology surveys. 3DEX (3D EXpansions) is a public code for fast Fourier-Bessel decomposition of 3D all-sky surveys which takes advantage of HEALPix for the calculation of tangential modes. For surveys with millions of galaxies, computation time is reduced by a factor 4-12 depending on the desired scales and accuracy. The formulation is also suitable for pre-calculations and external storage of the spherical harmonics, which allows for further speed improvements. The 3DEX code can accommodate data with masked regions of missing data. It can be applied not only to cosmological data, but also to 3D data in spherical coordinates in other scientific fields.

Credit: Leistedt, B.; Rassat, A.; Refregier, A.; Starck, J.-L.

Site: https://github.com/ixkael/3DEX

Bibcode: 2011ascl.soft11011L

Preferred citation method: https://ui.adsabs.harvard.edu/abs/2012A%26A...540A..60L and the source

ID: ascl:1111.011
Last edited by Ada Coda on Fri Aug 09, 2019 9:41 pm, edited 1 time in total.
Reason: Updated code entry.
Code-seeking owl at your service

Post Reply