Built on

A. Lue, L.-M. Wang, and M. Kamionkowski, Cosmological signature of new parity violating interactions
1999
Earlier work this paper cites.
WMAP Collaboration
2003
Earlier work this paper cites.
D. Babich and M. Zaldarriaga, Primordial bispectrum information from CMB polarization
2004
Earlier work this paper cites.
C. Caprini, R. Durrer, and T. Kahniashvili, The Cosmic microwave background and helical magnetic fields: The Tensor mode
2004
Earlier work this paper cites.
E. Komatsu, D. N. Spergel, and B. D. Wandelt, Measuring primordial non-Gaussianity in the cosmic microwave background
2005
Earlier work this paper cites.
K. Gorski, E. Hivon, A. Banday, B. Wandelt, F. Hansen, et. al
2005
Earlier work this paper cites.
P. Creminelli, A. Nicolis, L. Senatore, M. Tegmark, and M. Zaldarriaga, Limits on non-gaussianities from wmap data
2006
Earlier work this paper cites.
A. P. Yadav, E. Komatsu, and B. D. Wandelt, Fast Estimator of Primordial Non-Gaussianity from Temperature and Polarization Anisotropies in the Cosmic Microwave Background
2007
Earlier work this paper cites.
A. P. Yadav, E. Komatsu, B. D. Wandelt, M. Liguori, F. K. Hansen, et. al
Original
2008
Earlier work this paper cites.
A. P. Yadav and B. D. Wandelt, Evidence of Primordial Non-Gaussianity (f(NL)) in the Wilkinson Microwave Anisotropy Probe 3-Year Data at 2.8sigma
Original
2008
Earlier work this paper cites.
WMAP Collaboration
Original
2009
Earlier work this paper cites.

Similar

J. Fergusson, M. Liguori, and E. Shellard, General CMB and Primordial Bispectrum Estimation I: Mode Expansion, Map-Making and Measures of F NL F_{\rm NL}
Original
2010
Cited alongside, same era.
M. Liguori, E. Sefusatti, J. R. Fergusson, and E. Shellard, Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure
Original
2010
Cited alongside, same era.
L. Senatore, K. M. Smith, and M. Zaldarriaga, Non-Gaussianities in Single Field Inflation and their Optimal Limits from the WMAP 5-year Data
Original
2010
Cited alongside, same era.
J. M. Maldacena and G. L. Pimentel, On graviton non-Gaussianities during inflation
Original
2011
Cited alongside, same era.
J. Soda, H. Kodama, and M. Nozawa, Parity Violation in Graviton Non-gaussianity

Then

J. Fergusson, M. Liguori, and E. Shellard, The CMB Bispectrum
Original
2012
Later among the works it cites.
N. Barnaby, J. Moxon, R. Namba, M. Peloso, G. Shiu, et. al
Original
2012
Later among the works it cites.
Planck Collaboration
Original
2013
Later among the works it cites.
T. Zhu, W. Zhao, Y. Huang, A. Wang, and Q. Wu, Effects of parity violation on non-gaussianity of primordial gravitational waves in Hořava-Lifshitz gravity
Original
2013
Later among the works it cites.
J. L. Cook and L. Sorbo, An inflationary model with small scalar and large tensor nongaussianities
Original
2013

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2014

Observed parity-odd CMB temperature bispectrum

Shiraishi, Maresuke, Liguori, Michele, Fergusson, James R.

Understand

Parity-odd non-Gaussianities create a variety of temperature bispectra in the cosmic microwave background (CMB), defined in the domain: $\ell_1 + \ell_2 + \ell_3 = {\rm odd}$.

These models are yet unconstrained in the literature, that so far focused exclusively on the more common parity-even scenarios.
In this work, we provide the first experimental constraints on parity-odd bispectrum signals in WMAP 9-year temperature data, using a separable modal parity-odd estimator.
Comparing theoretical bispectrum templates to the observed bispectrum, we place constraints on the so-called nonlineality parameters of parity-odd tensor non-Gaussianities predicted by several Early Universe models.

Built on

A. Lue, L.-M. Wang, and M. Kamionkowski, Cosmological signature of new parity violating interactions
1999
Earlier work this paper cites.
WMAP Collaboration
2003
Earlier work this paper cites.
D. Babich and M. Zaldarriaga, Primordial bispectrum information from CMB polarization
2004
Earlier work this paper cites.
C. Caprini, R. Durrer, and T. Kahniashvili, The Cosmic microwave background and helical magnetic fields: The Tensor mode
2004
Earlier work this paper cites.
E. Komatsu, D. N. Spergel, and B. D. Wandelt, Measuring primordial non-Gaussianity in the cosmic microwave background
2005
Earlier work this paper cites.
K. Gorski, E. Hivon, A. Banday, B. Wandelt, F. Hansen, et. al
2005
Earlier work this paper cites.
P. Creminelli, A. Nicolis, L. Senatore, M. Tegmark, and M. Zaldarriaga, Limits on non-gaussianities from wmap data
2006
Earlier work this paper cites.
A. P. Yadav, E. Komatsu, and B. D. Wandelt, Fast Estimator of Primordial Non-Gaussianity from Temperature and Polarization Anisotropies in the Cosmic Microwave Background
2007
Earlier work this paper cites.
A. P. Yadav, E. Komatsu, B. D. Wandelt, M. Liguori, F. K. Hansen, et. al
Original
2008
Earlier work this paper cites.
A. P. Yadav and B. D. Wandelt, Evidence of Primordial Non-Gaussianity (f(NL)) in the Wilkinson Microwave Anisotropy Probe 3-Year Data at 2.8sigma
Original
2008
Earlier work this paper cites.
WMAP Collaboration
Original
2009
Earlier work this paper cites.