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CMB Anisotropy Computations Using Hydra Gas Code

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Frontiers of Fundamental Physics and Physics Education Research

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 145))

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Abstract

From FFP6 to FFP11, we presented the advances in our Cosmic Microwave Background (CMB) anisotropy computations using N-body Hydra Codes. For such computations, codes without baryons were used: First sequential versions and afterwards parallel ones. With both of them we computed the weak lensing and the Rees-Sciama contributions to the CMB angular power spectrum. Using our numerical techniques, we reported a lensing effect higher than that estimated in previous papers (for very small angular scales). Our CMB computations require less interpolations and approximations than other approaches. This could explain part of our excess of power in lensing computations. Our higher time and angular resolutions could also contribute to this excess. Here, recent advances on previous computations are presented. Computations with baryons have been started. These calculations allow us to compute the Sunyaev-Zel’dovich contribution to the CMB angular power spectrum. We are also trying to compute the three effects—weak lensing, Rees-Sciama and Sunyaev-Zel’dovich—at the same time, with the essential aim of seeing how their power spectra couple among them.

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Acknowledgments

This work has been partially supported by the Spanish Ministerio de Educación y Ciencia, MEC-FEDER project FIS2009-07705.

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Authors and Affiliations

  1. Institut de Matemàtica Multidisciplinària, Universitat Politècnica de València, Camí de Veras/n, 46022, València, Spain

    Màrius Josep Fullana i Alfonso

  2. Departament de Matemàtica Aplicada, Universitat de València, Dr. Moliner 50, 46100, Burjassot, Spain

    Josep Vicent Arnau i Córdoba

  3. Department Astronomy and Physics, St. Mary’s University, Halifax, Nova Scotia, B3H3C3, Canada

    Robert J. Thacker

  4. Department of Physics and Astronomy, McMaster University, 1280 Main St. West, Hamilton, Ontario, L8S 4M1, Canada

    Hugh M. P. Couchman

  5. Departament d’Astronomia i Astrofísica, Universitat de València, Dr. Moliner 50, 46100, Burjassot, Spain

    Diego P. Sáez Milán

Authors
  1. Màrius Josep Fullana i Alfonso
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  2. Josep Vicent Arnau i Córdoba
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  3. Robert J. Thacker
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  4. Hugh M. P. Couchman
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  5. Diego P. Sáez Milán
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Corresponding author

Correspondence to Màrius Josep Fullana i Alfonso .

Editor information

Editors and Affiliations

  1. Birla Science Centre, Hyderabad, India

    Burra G. Sidharth

  2. DCFA - Section ofMathematics and Physics, University of Udine, Udine, Italy

    Marisa Michelini

  3. DCFA - Section of Mathematics and Physic, University of Udine, Udine, Italy

    Lorenzo Santi

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© 2014 Springer International Publishing Switzerland

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Alfonso, M.J.F.i., Córdoba, J.V.A.i., Thacker, R.J., Couchman, H.M.P., Milán, D.P.S. (2014). CMB Anisotropy Computations Using Hydra Gas Code. In: Sidharth, B., Michelini, M., Santi, L. (eds) Frontiers of Fundamental Physics and Physics Education Research. Springer Proceedings in Physics, vol 145. Springer, Cham. https://doi.org/10.1007/978-3-319-00297-2_19

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