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Title: General quadrupolar statistical anisotropy: Planck limits

Abstract

Several early Universe scenarios predict a direction-dependent spectrum of primordial curvature perturbations. This translates into the violation of the statistical isotropy of cosmic microwave background radiation. Previous searches for statistical anisotropy mainly focussed on a quadrupolar direction-dependence characterised by a single multipole vector and an overall amplitude g {sub *}. Generically, however, the quadrupole has a more complicated geometry described by two multipole vectors and g {sub *}. This is the subject of the present work. In particular, we limit the amplitude g {sub *} for different shapes of the quadrupole by making use of Planck 2015 maps. We also constrain certain inflationary scenarios which predict this kind of more general quadrupolar statistical anisotropy.

Authors:
 [1];  [2];  [3];  [4]
  1. Gran Sasso Science Institute (INFN), Viale Francesco Crispi 7, I-67100 L'Aquila (Italy)
  2. Institute for Nuclear Research of the Russian Academy of Sciences, Prospect of the 60th Anniversary of October 7a, 117312 Moscow (Russian Federation)
  3. Faculty of Engineering, Østfold University College, P.O. Box 700, 1757 Halden (Norway)
  4. National Institute of Chemical Physics and Biophysics, Rävala 10, 10143 Tallinn (Estonia)
Publication Date:
OSTI Identifier:
22679965
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AMPLITUDES; ANISOTROPY; BACKGROUND RADIATION; DISTURBANCES; INFLATIONARY UNIVERSE; ISOTROPY; PERTURBATION THEORY; QUADRUPOLES; RELICT RADIATION; SPECTRA; UNIVERSE

Citation Formats

Ramazanov, S., Rubtsov, G., Thorsrud, M., and Urban, F.R., E-mail: sabir.ramazanov@gssi.infn.it, E-mail: grisha@ms2.inr.ac.ru, E-mail: mikjel.thorsrud@hiof.no, E-mail: federico.urban@kbfi.ee. General quadrupolar statistical anisotropy: Planck limits. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/03/039.
Ramazanov, S., Rubtsov, G., Thorsrud, M., & Urban, F.R., E-mail: sabir.ramazanov@gssi.infn.it, E-mail: grisha@ms2.inr.ac.ru, E-mail: mikjel.thorsrud@hiof.no, E-mail: federico.urban@kbfi.ee. General quadrupolar statistical anisotropy: Planck limits. United States. doi:10.1088/1475-7516/2017/03/039.
Ramazanov, S., Rubtsov, G., Thorsrud, M., and Urban, F.R., E-mail: sabir.ramazanov@gssi.infn.it, E-mail: grisha@ms2.inr.ac.ru, E-mail: mikjel.thorsrud@hiof.no, E-mail: federico.urban@kbfi.ee. Wed . "General quadrupolar statistical anisotropy: Planck limits". United States. doi:10.1088/1475-7516/2017/03/039.
@article{osti_22679965,
title = {General quadrupolar statistical anisotropy: Planck limits},
author = {Ramazanov, S. and Rubtsov, G. and Thorsrud, M. and Urban, F.R., E-mail: sabir.ramazanov@gssi.infn.it, E-mail: grisha@ms2.inr.ac.ru, E-mail: mikjel.thorsrud@hiof.no, E-mail: federico.urban@kbfi.ee},
abstractNote = {Several early Universe scenarios predict a direction-dependent spectrum of primordial curvature perturbations. This translates into the violation of the statistical isotropy of cosmic microwave background radiation. Previous searches for statistical anisotropy mainly focussed on a quadrupolar direction-dependence characterised by a single multipole vector and an overall amplitude g {sub *}. Generically, however, the quadrupole has a more complicated geometry described by two multipole vectors and g {sub *}. This is the subject of the present work. In particular, we limit the amplitude g {sub *} for different shapes of the quadrupole by making use of Planck 2015 maps. We also constrain certain inflationary scenarios which predict this kind of more general quadrupolar statistical anisotropy.},
doi = {10.1088/1475-7516/2017/03/039},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 03,
volume = 2017,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}