Explanipedia

Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements Open

Д. А. Канн, N. E. White, G. Ghirlanda, S. R. Oates, A. Melandri , et al. · 2024

\nContext. Gamma-ray bursts (GRBs) are ideal probes of the Universe at high redshift (ɀ), pinpointing the locations of the earliest star-forming galaxies and providing bright backlights with simple featureless power-law spectra that can be…

Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements Open

Д. А. Канн, N. E. White, G. Ghirlanda, S. R. Oates, A. Melandri , et al. · 2024

Context . Gamma-ray bursts (GRBs) are ideal probes of the Universe at high redshift (ɀ), pinpointing the locations of the earliest star-forming galaxies and providing bright backlights with simple featureless power-law spectra that can be …

Cosmological parameters derived from the final Planck data release (PR4) Open

M. Tristram, A. J. Banday, M. Douspis, X. Garrido, K. M. Górski , et al. · 2023

We present cosmological parameter constraints using maps from the last Planck data release (PR4). In particular, we detail an upgraded version of the cosmic microwave background likelihood, HiLLiPoP , that is based on angular power spectra…

Cosmological parameters derived from the final (PR4) Planck data release Open

M. Tristram, A. J. Banday, M. Douspis, X. Garrido, K. M. Górski , et al. · 2023

We present constraints on cosmological parameters using maps from the last Planck data release (PR4). In particular, we detail an upgraded version of the cosmic microwave background likelihood, HiLLiPoP, based on angular power spectra and …

Cosmic Microwave Background Recovery: A Graph-Based Bayesian Convolutional Network Approach Open

Jadie Adams, Steven Lu, K. M. Górski, G. Rocha, Kiri L. Wagstaff · 2023

The cosmic microwave background (CMB) is a significant source of knowledge about the origin and evolution of our universe. However, observations of the CMB are contaminated by foreground emissions, obscuring the CMB signal and reducing its…

Foreground separation and constraints on primordial gravitational waves with the PICO space mission Open

R. Aurlien, M. Remazeilles, Sebastian Belkner, Julien Carron, Jacques Delabrouille , et al. · 2023

PICO is a concept for a NASA probe-scale mission aiming to detect or constrain the tensor to scalar ratio r , a parameter that quantifies the amplitude of inflationary gravity waves. We carry out map-based component separation on simulatio…

Planck intermediate results V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect Open

P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, F. Atrio‐Barandela , et al. · 2023

Taking advantage of the all-sky coverage and broadfrequency range of the Planck satellite, we study the Sunyaev-Zeldovich (SZ) and pressure profiles of 62 nearby massive clusters detected at high significance in the 14-month nominal survey…

Planck intermediate results XI. The gas content of dark matter halos: The sunyaev-zeldovich-stellar mass relation for locally brightest galaxies Open

P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, F. Atrio‐Barandela , et al. · 2023

We present the scaling relation between Sunyaev-Zeldovich (SZ) signal and stellar mass for almost 260,000 locally brightest galaxies (LBGs) selected from the Sloan Digital Sky Survey (SDSS). These are predominantly the central galaxies of …

Probing cosmic inflation with the LiteBIRD cosmic microwave background polarization survey Open

Erwan Allys, Kam Arnold, J. Aumont, S. Azzoni, C. Baccigalupi , et al. · 2023

LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. The Japan Aerospace Exploration Agency…

Cosmic Microwave Background Recovery: A Graph-Based Bayesian Convolutional Network Approach Open

Jadie Adams, Steven Lu, K. M. Górski, G. Rocha, Kiri L. Wagstaff · 2023

The cosmic microwave background (CMB) is a significant source of knowledge about the origin and evolution of our universe. However, observations of the CMB are contaminated by foreground emissions, obscuring the CMB signal and reducing its…

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…

Foreground Separation and Constraints on Primordial Gravitational Waves with the PICO Space Mission Open

R. Aurlien, M. Remazeilles, Sebastian Belkner, Julien Carron, Jacques Delabrouille , et al. · 2022

PICO is a concept for a NASA probe-scale mission aiming to detect or constrain the tensor to scalar ratio $r$, a parameter that quantifies the amplitude of inflationary gravity waves. We carry out map-based component separation on simulati…

Polarization and variability of compact sources measured in Planck time-ordered data Open

G. Rocha, R. Keskitalo, B. Partridge, A. Marscher, C. O'Dea , et al. · 2022

This paper introduces a new Planck Catalog of Polarized and Variable Compact Sources (PCCS-PV) comprising 153 sources, the majority of which are extragalactic. The data include both the total flux density and linear polarization measured b…

Polarization and variability of compact sources measured in Planck time-ordered data Open

G. Rocha, Reijo Keskitalo, B. Partridge, Alan P. Marscher, C. P. O’Dea , et al. · 2022

This paper introduces a new Planck Catalog of Polarized and Variable Compact Sources (PCCS-PV) comprising 153 sources, the majority of which are extragalactic. The data include both the total flux density and linear polarization measured b…

Improved limits on the tensor-to-scalar ratio using BICEP and data Open

M. Tristram, A. J. Banday, K. M. Górski, Reijo Keskitalo, C. R. Lawrence , et al. · 2022

We present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 (BK18) and Planck PR4 data allowing us to fit for r consistently with the six parameters of the ? CDM model. We discuss the sensitivity of constr…

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…

Improved limits on the tensor-to-scalar ratio using BICEP and Planck Open

M. Tristram, A. J. Banday, K. M. Górski, Reijo Keskitalo, C. R. Lawrence , et al. · 2021

We present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 and Planck PR4 data allowing us to fit for r consistently with the six parameters of the $Λ$CDM model without fixing any of them. In particular, …

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…

Planck 2018 results Open

N. Aghanim, Y. Akrami, M. Ashdown, J. Aumont, C. Baccigalupi , et al. · 2021

In the original version, the bounds given in Eqs. (87a) and (87b) on the contribution to the early-time optical depth, (15,30), contained a numerical error in deriving the 95th percentile from the Monte Carlo samples. The corrected 95% upp…

The Gamow Explorer: a Gamma-Ray Burst Observatory to study the high redshift universe and enable multi-messenger astrophysics Open

N. E. White, F. E. Bauer, W. H. Baumgartner, Marshall W. Bautz, E. Berger , et al. · 2021

The Gamow Explorer will use Gamma Ray Bursts (GRBs) to: 1) probe the high redshift universe (z < 6) when the first stars were born, galaxies formed and Hydrogen was reionized; and 2) enable multi-messenger astrophysics by rapidly identifyi…

Application of Topological Data Analysis to Multi-Resolution Matching of Aerosol Optical Depth Maps Open

Dorcas Ofori-Boateng, Huikyo Lee, K. M. Górski, M. J. Garay, Yulia R. Gel · 2021

Topological data analysis (TDA) combines concepts from algebraic topology, machine learning, statistics, and data science which allow us to study data in terms of their latent shape properties. Despite the use of TDA in a broad range of ap…

QUBIC I: Overview and ScienceProgram Open

J.–Ch. Hamilton, L. Mousset, E.S. Battistelli, P. Chanial, R. Charlassier , et al. · 2020

The Q $\&$ U Bolometric Interferometer for Cosmology (QUBIC) is a novel kind of polarimeter optimized for the measurement of the B-mode polarization of the Cosmic Microwave Background (CMB), which is one of the major challenges of observat…

Planck intermediate results Open

Y. Akrami, M. Ashdown, J. Aumont, C. Baccigalupi, M. Ballardini , et al. · 2020

The largest temperature anisotropy in the cosmic microwave background (CMB) is the dipole, which has been measured with increasing accuracy for more than three decades, particularly with the Planck satellite. The simplest interpretation of…

Planck 2018 results: XII. Galactic astrophysics using polarized dust emission Open

N. Aghanim, Y. Akrami, M. I. R. Alves, M. Ashdown, J. Aumont , et al. · 2020

Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to \nthe Planck full-sky maps. In this paper we make use of such full-sky maps of dust pola…

QUBIC VI: cryogenic half wave plate rotator, design and performances Open

G. D’Alessandro, L. Mele, F. Columbro, Giovanni D’Amico, E. S. Battistelli , et al. · 2020

Inflation Gravity Waves B-Modes polarization detection is the ultimate goal of modern large angular scale cosmic microwave background (CMB) experiments around the world. A big effort is undergoing with the deployment of many ground-based, …

Planck intermediate results Open

Y. Akrami, M. Ashdown, J. Aumont, C. Baccigalupi, M. Ballardini , et al. · 2020

We describe an extension of the most recent version of the Planck Catalogue of Compact Sources (PCCS2), produced using a new multi-band Bayesian Extraction and Estimation Package ( BeeP ). BeeP assumes that the compact sources present in P…

QUBIC VIII: Optical design and performance Open

C. Chapron, L. Conversi, P. de Bernardis, L. Grandsire, J.–Ch. Hamilton , et al. · 2020

The Q and U Bolometric Interferometer for Cosmology (QUBIC) is a ground-based experiment that aims to detect B-mode polarisation anisotropies in the CMB at angular scales around the l=100 recombination peak. Systematic errors make ground-b…

Planck intermediate results Open

Y. Akrami, K. J. Andersen, M. Ashdown, C. Baccigalupi, M. Ballardini , et al. · 2020

We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data from the Planck Low Frequency Instrument (LFI) and High Frequency Instrument (HFI) using high-performance computer…

Planck2018 results Open

Y. Akrami, Frederico Arroja, M. Ashdown, J. Aumont, C. Baccigalupi , et al. · 2020

We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E -mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable template-fitting, binned,…

Planck2018 results Open

N. Aghanim, Y. Akrami, M. Ashdown, J. Aumont, C. Baccigalupi , et al. · 2020

We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid method using di…

K. M. Górski YOU? Author Swipe