Explanipedia

LiteBIRD science goals and forecasts: constraining isotropic cosmic birefringence Open

E. de la Hoz, P. Diego-Palazuelos, Josquin Errard, A. Gruppuso, Baptiste Jost , et al. · 2025

Cosmic birefringence (CB) is the rotation of the photons' linear polarisation plane during propagation. Such an effect is a tracer of parity-violating extensions of standard electromagnetism and would probe the existence of a new cosmologi…

Exploration of the polarization angle variability of the Crab Nebula with POLARBEAR and its application to the search for axionlike particles Open

S. Adachi, Tylor Adkins, C. Baccigalupi, Y. Chinone, Kevin T. Crowley , et al. · 2024

The Crab Nebula, also known as Tau A, is a polarized astronomical source at millimeter wavelengths. It has been used as a stable light source for polarization angle calibration in millimeter-wave astronomy. However, it is known that its in…

Constraints on axionlike polarization oscillations in the cosmic microwave background with POLARBEAR Open

S. Adachi, Tylor Adkins, Kam Arnold, C. Baccigalupi, Darcy Barron , et al. · 2023

Very light pseudoscalar fields, often referred to as axions, are compelling dark matter candidates and can potentially be detected through their coupling to the electromagnetic field. Recently a novel detection technique using the cosmic m…

Characterization of a half-wave plate for cosmic microwave background circular polarization measurement with POLARBEAR Open

T. Fujino, S. Takakura, Y. Chinone, M. Hasegawa, M. Hazumi , et al. · 2023

A half-wave plate (HWP) is often used as a modulator to suppress systematic error in the measurements of cosmic microwave background (CMB) polarization. A HWP can also be used to measure circular polarization (CP) through its optical leaka…

Status of the search for ${}^{48}$ Ca double beta decay with CANDLES Open

Y. Minami, NULL AUTHOR_ID, NULL AUTHOR_ID, NULL AUTHOR_ID, NULL AUTHOR_ID , et al. · 2023

The origin of neutrino masses remains shrouded in mystery. One of the possible scenarios is that neutrinos have Majorana masses, which leads to neutrinoless double-beta decay ($0\nu\beta\beta$). CANDLES is a project to search for the $0\nu…

Extended delta-map: A map-based foreground removal method for CMB polarization observations Open

Y. Minami, Kiyotomo Ichiki · 2023

In order to extract information about inflationary gravitational waves using B-mode patterns of cosmic microwave polarization anisotropy, we need to remove the foreground radiation from the Milky Way. In our previous delta-map method for f…

Characterization of a half-wave plate for cosmic microwave background circular polarization measurement with POLARBEAR Open

T. Fujino, S. Takakura, Y. Chinone, M. Hasegawa, M. Hazumi , et al. · 2023

A half-wave plate (HWP) is often used as a modulator to suppress systematic error in the measurements of cosmic microwave background (CMB) polarization. A HWP can also be used to measure circular polarization (CP) through its optical leaka…

Robustness of cosmic birefringence measurement against Galactic foreground emission and instrumental systematics Open

P. Diego-Palazuelos, E. Martínez-González, P. Vielva, R. B. Barreiro, M. Tristram , et al. · 2023

The polarization of the cosmic microwave background (CMB) can be used to search for parity-violating processes like that predicted by a Chern-Simons coupling to a light pseudoscalar field. Such an interaction rotates E modes into E modes i…

Extended Delta-map: a map-based foreground removal method for CMB polarization observations Open

Y. Minami, Kiyotomo Ichiki · 2022

In order to extract information about inflationary gravitational waves using $B$-mode patterns of cosmic microwave polarization anisotropy, we need to remove the foreground radiation from the Milky Way. In our previous delta-map method for…

Robustness of cosmic birefringence measurement against Galactic\n foreground emission and instrumental systematics Open

P. Diego-Palazuelos, E. Martínez-González, P. Vielva, R. B. Barreiro, M. Tomasi , et al. · 2022

The polarization of the cosmic microwave background (CMB) can be used to\nsearch for parity-violating processes like that predicted by a Chern-Simons\ncoupling to a light pseudoscalar field. Such an interaction rotates $E$ modes\ninto $B$ …

Can primordial parity violation explain the observed cosmic birefringence? Open

Tomohiro Fujita, Y. Minami, Maresuke Shiraishi, Shuichiro Yokoyama · 2022

Recently, the cross-correlation between $E$- and $B$-mode polarization of the cosmic microwave background (CMB), which is well explained by cosmic birefringence with rotation angle $β\approx 0.3$ deg, has been found in CMB polarization dat…

Improved Upper Limit on Degree-scale CMB B-mode Polarization Power from the 670 Square-degree POLARBEAR Survey Open

C. Baccigalupi, S. Chapman, K. Cheung, Y. Chinone, T. Elleflot , et al. · 2022

We report an improved measurement of the degree-scale cosmic microwave background B -mode angular-power spectrum over 670 deg 2 sky area at 150 GHz with P olarbear . In the original analysis of the data, errors in the angle measurement of …

Improved Upper Limit on Degree-scale CMB B-mode Polarization Power from the 670 Square-degree POLARBEAR Survey Open

S. Adachi, Tylor Adkins, Mario Faúndez, Kam Arnold, C. Baccigalupi , et al. · 2022

We report an improved measurement of the degree-scale cosmic microwave background B -mode angular-power spectrum over 670 deg 2 sky area at 150 GHz with P olarbear . In the original analysis of the data, errors in the angle measurement of …

Cosmic Birefringence from Planck Public Release 4 Open

P. Diego-Palazuelos, J.R. Eskilt, Y. Minami, M. Tristram, R.M. Sullivan , et al. · 2022

We search for the signature of parity-violating physics in the Cosmic Microwave Background using Planck polarization data from the Public Release 4 (PR4 or $\mathtt{NPIPE}$). For nearly full-sky data, we initially find a birefringence angl…

In-flight polarization angle calibration for LiteBIRD: blind challenge and cosmological implications Open

N. Krachmalnicoff, T. Matsumura, E. de la Hoz, S. Basak, A. Gruppuso , et al. · 2022

We present a demonstration of the in-flight polarization angle calibration for the JAXA/ISAS second strategic large class mission, LiteBIRD , and estimate its impact on the measurement of the tensor-to-scalar ratio parameter, r , using sim…

Status of <sup>48</sup>Ca double beta decay search in CANDLES Open

Y. Minami, K. Fushimi, Takaaki Harada, Akihiro Hashimoto, R. Hazama , et al. · 2021

We study a strategy to reduce veto-time in the search for neutrino-less double-beta decay ( 0υββ ) with CANDLES-III system. We develop a new likelihood analysis and apply it to our new Run010 data. We show that we can increase the un-vetoe…

In-flight polarization angle calibration for LiteBIRD: blind challenge and cosmological implications Open

N. Krachmalnicoff, T. Matsumura, E. de la Hoz, S. Basak, A. Gruppuso , et al. · 2021

We present a demonstration of the in-flight polarization angle calibration for the JAXA/ISAS second strategic large class mission, LiteBIRD, and estimate its impact on the measurement of the tensor-to-scalar ratio parameter, r, using simul…

Probing axionlike particles via cosmic microwave background polarization Open

Tomohiro Fujita, Y. Minami, Kai Murai, Hiromasa Nakatsuka · 2021

Axion-like particles (ALPs) rotate the linear polarization of photons through\nthe ALP-photon coupling and convert the cosmic microwave background (CMB)\n$E$-mode to the $B$-mode. We derive the relation between the ALP dynamics and\nthe ro…

Detector fabrication development for the LiteBIRD satellite mission Open

Benjamin Westbrook, Christopher Raum, Shawn Beckman, Adrian T. Lee, Nicole Farias , et al. · 2021

LiteBIRD is a JAXA-led strategic Large-Class satellite mission designed to measure the polarization of the cosmic microwave background and cosmic foregrounds from 34 to 448 GHz across the entire sky from L2 in the late 2020's. The primary …

New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data Open

Y. Minami, Eiichiro Komatsu · 2020

We search for evidence of parity-violating physics in the Planck 2018 polarization data and report on a new measurement of the cosmic birefringence angle β. The previous measurements are limited by the systematic uncertainty in the absolut…

A Measurement of the CMB E-mode Angular Power Spectrum at Subdegree Scales from 670 Square Degrees of POLARBEAR Data Open

S. Adachi, M. A. O. Aguilar Faúndez, Kam Arnold, C. Baccigalupi, Darcy Barron , et al. · 2020

We report a measurement of the E -mode polarization power spectrum of the cosmic microwave background (CMB) using 150 GHz data taken from 2014 July to 2016 December with the P olarbear experiment. We reach an effective polarization map noi…

Simultaneous determination of the cosmic birefringence and miscalibrated polarization angles II: Including cross-frequency spectra Open

Y. Minami, Eiichiro Komatsu · 2020

We develop a strategy to determine the cosmic birefringence and miscalibrated polarization angles simultaneously using the observed $EB$ polarization power spectra of the cosmic microwave background and the Galactic foreground emission. We…

A Measurement of the Degree-scale CMB B-mode Angular Power Spectrum with Polarbear Open

S. Adachi, M. A. O. Aguilar Faúndez, Kam Arnold, C. Baccigalupi, Darcy Barron , et al. · 2020

We present a measurement of the B -mode polarization power spectrum of the cosmic microwave background (CMB) using data taken from 2014 July to 2016 December with the Polarbear experiment. The CMB power spectra are measured using observati…

Simultaneous determination of the cosmic birefringence and miscalibrated polarization angles II: Including cross frequency spectra Open

Y. Minami, Eiichiro Komatsu · 2020

We develop a strategy to determine the cosmic birefringence and miscalibrated polarization angles simultaneously using the observed $EB$ polarization power spectra of the cosmic microwave background and the Galactic foreground emission. We…

Internal Delensing of Cosmic Microwave Background Polarization -Modes with the POLARBEAR Experiment Open

S. Adachi, M. A. O. Aguilar Faúndez, Y. Akiba, Aamir Ali, Kam Arnold , et al. · 2020

Using only cosmic microwave background polarization data from the polarbear experiment, we measure B-mode polarization delensing on subdegree scales at more than 5σ significance. We achieve a 14% B-mode power variance reduction, the highes…

Deployment of Polarbear-2A Open

Daisuke Kaneko, S. Adachi, P. A. R. Ade, M. Aguilar Faúndez, Y. Akiba , et al. · 2020

Irradiation Tests of Superconducting Detectors and Comparison with Simulations Open

Y. Minami, Y. Akiba, S. Beckman, M. Hazumi, C. L. Kuo , et al. · 2020

Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment Open

Y. Chinone, S. Adachi, PAR Ade, Mario Aguilar, Y. Akiba , et al. · 2020

P OLARBEAR is a Cosmic Microwave Background radiation (CMB) polarization experiment that is located in the Atacama Desert in Chile. The scientific goals of the experiment are to characterize the B -mode signal from gravitational lensing, a…

Cross-correlation of CMB polarization lensing with High-z submillimeter Herschel-ATLAS galaxies Open

M. A. O. Aguilar Faúndez, Kam Arnold, C. Baccigalupi, Darcy Barron, D. Beck , et al. · 2019

We report a 4.8σ measurement of the cross-correlation signal between the cosmic microwave background (CMB) lensing convergence reconstructed from measurements of the CMB polarization made by the Polarbear experiment and the infrared-select…

Evidence for the cross-correlation between cosmic icrowave background polarization lensing from Polarbear and cosmic shear from Subaru Hyper Suprime-Cam Open

Toshiya Namikawa, Y. Chinone, Hironao Miyatake, Masamune Oguri, Ryuichi Takahashi , et al. · 2019

We present the first measurement of cross-correlation between the lensing potential, reconstructed from cosmic microwave background (CMB) polarization data, and the cosmic shear field from galaxy shapes. This measurement is made using data…

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