Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-25T17:00:19.826Z Has data issue: false hasContentIssue false
  • English
  • Français

Supervoid Origin of the Cold Spot in the Cosmic Microwave Background

Published online by Cambridge University Press:  01 July 2015

András Kovács ,
István Szapudi ,
Benjamin R. Granett ,
Zsolt Frei ,
Joseph Silk ,
Will Burgett ,
Shaun Cole ,
Peter W. Draper ,
Daniel J. Farrow  and
Nicholas Kaiser
...Show all authors
András Kovács
Affiliation:
Institute of Physics, Eötvös Loránd University, 1117 Pázmány Péter sétány 1/A Budapest, Hungary MTA-ELTE EIRSA “Lendület” Astrophysics Research Group, 1117 Pázmány Péter sétány 1/A Budapest, Hungary
István Szapudi
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Benjamin R. Granett
Affiliation:
INAF OA Brera, Via E. Bianchi 46, Merate, Italy
Zsolt Frei
Affiliation:
Institute of Physics, Eötvös Loránd University, 1117 Pázmány Péter sétány 1/A Budapest, Hungary MTA-ELTE EIRSA “Lendület” Astrophysics Research Group, 1117 Pázmány Péter sétány 1/A Budapest, Hungary
Joseph Silk
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore MD 21218, USA
Will Burgett
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Shaun Cole
Affiliation:
Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
Peter W. Draper
Affiliation:
Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
Daniel J. Farrow
Affiliation:
Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
Nicholas Kaiser
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Eugene A. Magnier
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Nigel Metcalfe
Affiliation:
Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
Jeffrey S. Morgan
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Paul Price
Affiliation:
Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544
John Tonry
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Richard Wainscoat
Affiliation:
Institute for Astronomy, University of Hawaii2680 Woodlawn Drive, Honolulu, HI, 96822, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We use a WISE-2MASS-Pan-STARRS1 galaxy catalog to search for a supervoid in the direction of the Cosmic Microwave Background Cold Spot. We obtain photometric redshifts using our multicolor data set to create a tomographic map of the galaxy distribution. The radial density profile centred on the Cold Spot shows a large low density region, extending over 10's of degrees. Motivated by previous Cosmic Microwave Background results, we test for underdensities within two angular radii, 5°, and 15°. Our data, combined with an earlier measurement by Granett et al. 2010, are consistent with a large Rvoid=(192 ± 15)h−1 Mpc (2σ) supervoid with δ ≃ −0.13 ± 0.03 centered at z=0.22 ± 0.01. Such a supervoid, constituting a ∼3.5 σ fluctuation in the ΛCDM model, is a plausible cause for the Cold Spot.

Keywords

cosmic microwave backgroundobservationslarge-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S306: Statistical Challenges in 21st Century Cosmology , May 2014 , pp. 269 - 272
Copyright
Copyright © International Astronomical Union 2015 

References

Inoue, K. T. & Silk, J. 2006, ApJ 648 23–30Google Scholar
Szapudi, I., Kovács, A., & Granett, B. R., et al. 2014, arXiv:1405.1566Google Scholar
Finelli, F., Garcia-Bellido, J., Kovacs, A., Paci, F., & Szapudi, I. 2014, arXiv:1405.1555Google Scholar
Kovács, A. & Szapudi, I. 2014, arXiv:1401.0156Google Scholar
Garcia-Bellido, J. & Haugbølle, T. 2008, JCAP, 4:3Google Scholar
Gorski, K. M., Hivon, E., et al. 2005, Apj, 622:759–771Google Scholar
Wright, E. L., et al. 2010, AJ, 140:1868–1881Google Scholar
Granett, B. R., Neyrinck, M. C., & Szapudi, I. 2008, ApjL, 683:L99–L102CrossRefGoogle Scholar
Granett, B. R., Szapudi, I., & Neyrinck, M. C. 2010, Apj, 714:825–833Google Scholar
Skrutskie, M. F., Cutri, R. M., Stiening, R., et al. 2006, AJ, 131:1163–1183Google Scholar
Bennett, C. L., Larson, D., J. L., et al. Weiland. 2012 ArXiv e-printsGoogle Scholar
Vielva, P., et al. 2004, Apj, 609:22–34.CrossRefGoogle Scholar
Cruz, M.et al. 2008, MNRAS, 390:913–919Google Scholar
Driver, S. P., Hill, D. T., et al. 2011 MNRAS, 413:971–995Google Scholar
Planck 2013 results. XXIII. 2013 ArXiv e-printsGoogle Scholar
Kaiser, N.. SPIE Conference Series, 2004.Google Scholar