Published December 1, 2007 | Version Published
Journal Article Open

Searching for Non-Gaussian Signals in the BOOMERANG 2003 CMB Maps

  • 1. ROR icon University of Rome Tor Vergata
  • 2. ROR icon Sapienza University of Rome
  • 3. ROR icon Cardiff University
  • 4. ROR icon Jet Propulsion Lab
  • 5. ROR icon California Institute of Technology
  • 6. ROR icon Canadian Institute for Theoretical Astrophysics
  • 7. ROR icon Lawrence Berkeley National Laboratory
  • 8. ROR icon University of California, Berkeley
  • 9. ROR icon University of Oxford
  • 10. ROR icon Imperial College London
  • 11. ROR icon Infrared Processing and Analysis Center
  • 12. ROR icon Massachusetts Institute of Technology
  • 13. ROR icon Institut d'Astrophysique de Paris
  • 14. ROR icon University of Geneva
  • 15. ROR icon University of Cambridge
  • 16. ROR icon INFN Sezione di Padova
  • 17. ROR icon INFN Sezione di Roma I
  • 18. ROR icon Sierra Lobo (United States)
  • 19. ROR icon National Institute for Nuclear Physics
  • 20. ROR icon University of Toronto
  • 21. ROR icon European Space Astronomy Centre
  • 22. ROR icon University of Alberta
  • 23. ROR icon Osservatorio Astronomico di Padova
  • 24. ROR icon Case Western Reserve University
  • 25. ROR icon Astroparticle and Cosmology Laboratory

Abstract

We analyze the BOOMERANG 2003 (B03) 145 GHz temperature map to constrain the amplitude of a non-Gaussian, primordial contribution to CMB fluctuations. We perform a pixel-space analysis restricted to a portion of the map chosen in view of high-sensitivity, very low foreground contamination and tight control of systematic effects. We set up an estimator based on the three Minkowski functionals which relies on high-quality simulated data, including non-Gaussian CMB maps. We find good agreement with the Gaussian hypothesis and derive the first limits based on BOOMERANG data for the nonlinear coupling parameter f_(NL) as -300 < f_(NL) < 650 at 68% CL and -800 < f_(NL) < 1050 at 95% CL.

Additional Information

© 2007 American Astronomical Society. Print publication: Issue 2 (2007 December 1); received 2007 May 11; accepted for publication 2007 October 15; published 2007 October 29. BOOMERANG was supported by CIAR, CSA, and NERSC in Canada, ASI, University La Sapienza and PNRA in Italy, and NASA and NSF in the US. We thank CASPUR and NERSC/LBL. We acknowledge the use of HEALPix.

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Additional details

Identifiers

Eprint ID
16858
Resolver ID
CaltechAUTHORS:20091202-122207165

Funding

Canadian Institute for Advanced Research (CIFAR)
Canadian Space Agency (CSA)
Natural Sciences and Engineering Research Council of Canada (NERSC)
Agenzia Spaziale Italiana (ASI)
University La Sapienza
Programma Nazionale Ricerche in Antartide (PNRA)
NASA
NSF

Dates

Created
2009-12-03
Created from EPrint's datestamp field
Updated
2021-11-08
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Caltech groups
Physics Department