61 citations · 76 across the 10 of their papers we have counts for
11 papers
Cross-correlation between CMB B-modes and Faraday Rotation as a Novel Probe of Primordial Magnetic Fields
Toshiya Namikawa, Guanming Liang
We investigate the cross-bispectrum between the cosmic microwave background (CMB) -mode polarization and two Faraday rotation (FR) angles as a new probe of primordial magnetic f…
The Atacama Cosmology Telescope: Constraints on the anisotropic screening and birefringence effects with DR6
Darby M. Kramer, Alexander van Engelen, Frank J. Qu +14
While we have learned much from recent surveys of the mm-wave sky, many secondary anisotropies of the CMB remain under-explored. We consider two of these here: the anisotropic scre…
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Resolving the negative effective neutrino mass parameter with cosmic birefringence
Toshiya Namikawa
The recent measurement of baryonic acoustic oscillations by the Dark Energy Spectroscopic Instrument reveals a mild tension with observations of the cosmic microwave background (CM…
Planck Constraints on Axion-Like Particles through Isotropic Cosmic Birefringence
Toshiya Namikawa, Kai Murai, Fumihiro Naokawa
We present constraints on isotropic cosmic birefringence induced by axion-like particles (ALPs), derived from the analysis of cosmic microwave background (CMB) polarization measure…
Tomographic constraint on anisotropic cosmic birefringence
Toshiya Namikawa
We constrain anisotropic cosmic birefringence generated at reionization using Planck PR4 polarization data for the first time. Several recent analyses of WMAP and Planck polarizati…
Systematic effects on lensing reconstruction from a patchwork of CMB polarization maps
Ryo Nagata, Toshiya Namikawa
We investigate the tolerance for systematic errors in lensing analysis applied to a patchwork map of Cosmic Microwave Background polarization. We focus on the properties of the ind…
Constraining Ultralight ALP Dark Matter in Light of Cosmic Birefringence
Dongdong Zhang, Elisa G. M. Ferreira, Ippei Obata +1
Cosmic birefringence, the observed rotation of the polarization plane of the cosmic microwave background (CMB), serves as a compelling probe for parity-violating physics beyond the…
phase ambiguity of cosmic birefringence
Fumihiro Naokawa, Toshiya Namikawa, Kai Murai +2
We point out that the rotation angle of cosmic birefringence, which is a recently reported parity-violating signal in the cosmic microwave background (CMB), has a phase ambigui…
Exact CMB B-mode power spectrum from anisotropic cosmic birefringence
Toshiya Namikawa
We calculate the cosmic microwave background (CMB) -mode power spectrum resulting from anisotropic cosmic birefringence, without relying on the thin approximation of the last sc…
BICEP2 / Keck Array IX: New Bounds on Anisotropies of CMB Polarization Rotation and Implications for Axion-Like Particles and Primordial Magnetic Fields
Keck Array, BICEP2 Collaborations, : +65
We present the strongest constraints to date on anisotropies of cosmic microwave background (CMB) polarization rotation derived from 150 GHz data taken by the BICEP2/Keck Array CMB…