Elsner, Franz and Wandelt, Benjamin D. (2009) Improved Simulation of Non-Gaussian Temperature and Polarization Cosmic Microwave Background Maps. Astrophysical Journal Supplement Series, 184 (2). pp. 264-270. ISSN 0067-0049 http://resolver.caltech.edu/CaltechAUTHORS:20091021-084640342
- Published Version
Restricted to Repository administrators only
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20091021-084640342
We describe an algorithm to generate temperature and polarization maps of the cosmic microwave background (CMB) radiation containing non-Gaussianity of arbitrary local type. We apply an optimized quadrature scheme that allows us to predict and control integration accuracy, speed up the calculations, and reduce memory consumption by an order of magnitude. We generate 1000 non-Gaussian CMB temperature and polarization maps up to a multipole moment of ℓ_(max) = 1024. We validate the method and code using the power spectrum and the fast cubic (bispectrum) estimator and find consistent results. The simulations are provided to the community.
|Additional Information:||© 2009 The American Astronomical Society. Received 2009 June 25; accepted 2009 August 31; published 2009 September 16. Some of the results in this paper have been derived using the HEALPix (G´orski et al. 2005) package. B.D.W. is partially supported by NSF grants AST 0507676 and AST 07-08849. B.D.W. gratefully acknowledges the Alexander v. Humboldt Foundation’s Friedrich Wilhelm Bessel Award. B.D.W. thanks the Caltech Astrophysics group for their hospitality while this work was being completed.|
|Subject Keywords:||cosmic microwave background; cosmological parameters; methods: data analysis; methods: numerical|
|Official Citation:||Improved Simulation of Non-Gaussian Temperature and Polarization Cosmic Microwave Background Maps Franz Elsner and Benjamin D. Wandelt 2009 ApJS 184 264-270 doi: 10.1088/0067-0049/184/2/264|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||26 Oct 2009 18:40|
|Last Modified:||26 Dec 2012 11:29|
Repository Staff Only: item control page