Limits on anisotropic inflation from the Planck data

TY - JOUR

T1 - Limits on anisotropic inflation from the Planck data

AU - Kim, Jaiseung

AU - Komatsu, Eiichiro

PY - 2013/11/14

Y1 - 2013/11/14

N2 - Temperature anisotropy of the cosmic microwave background offers a test of the fundamental symmetry of spacetime during cosmic inflation. Violation of rotational symmetry yields a distinct signature in the power spectrum of primordial fluctuations as P(k)=P0(k)[1+g *(k^·E^cl)2], where E^cl is a preferred direction in space and g* is an amplitude. Using the Planck 2013 temperature maps, we find no evidence for violation of rotational symmetry, g*=0.002±0.016 (68% C.L.), once the known effects of asymmetry of the Planck beams and Galactic foreground emission are removed. (Based on observations obtained with the Planck Collaboration, a ESA science mission with instruments and contributions directly funded by ESA Member States, NASA, and Canada.)

AB - Temperature anisotropy of the cosmic microwave background offers a test of the fundamental symmetry of spacetime during cosmic inflation. Violation of rotational symmetry yields a distinct signature in the power spectrum of primordial fluctuations as P(k)=P0(k)[1+g *(k^·E^cl)2], where E^cl is a preferred direction in space and g* is an amplitude. Using the Planck 2013 temperature maps, we find no evidence for violation of rotational symmetry, g*=0.002±0.016 (68% C.L.), once the known effects of asymmetry of the Planck beams and Galactic foreground emission are removed. (Based on observations obtained with the Planck Collaboration, a ESA science mission with instruments and contributions directly funded by ESA Member States, NASA, and Canada.)

U2 - 10.1103/PhysRevD.88.101301

DO - 10.1103/PhysRevD.88.101301

M3 - Journal article

SN - 2470-0010

VL - 88

JO - Physical Review D

JF - Physical Review D

IS - 10

M1 - 101301

ER -