@article{10902/31211,
year = {2023},
url = {https://hdl.handle.net/10902/31211},
abstract = {Taking advantage of the reduced levels of noise and systematics in the data of the latest Planck release (PR4, also known as NPIPE), we construct a new all-sky Compton-y parameter map (hereafter, y-map) of the thermal Sunyaev?Zeldovich (SZ) effect from the Planck PR4 data. A tailored Needlet Internal Linear Combination (NILC) pipeline, first validated on detailed sky simulations, is applied to the nine single-frequency Planck PR4 sky maps, ranging from 30 to 857?GHz, to produce the PR4 y-map over 98 per?cent of the sky. Using map comparisons, angular power spectra, and one-point statistics, we show that the PR4 NILC y-map is of improved quality compared to that of the previous PR2 release. The new y-map shows reduced levels of large-scale striations associated with 1/f noise in the scan direction. Regions near the Galactic plane also show lower residual contamination by Galactic thermal dust emission. At small angular scales, the residual contamination by thermal noise and cosmic infrared background (CIB) emission is found to be reduced by around 7 and 34 per?cent, respectively, in the PR4 y-map. The PR4 NILC y-map is made publicly available for astrophysical and cosmological analyses of the thermal SZ effect.},
organization = {We thank Marcos Lopez-Caniego for providing point-source masks for PR4 data. We also thank Reijo Keskitalo and Hans Kristian Eriksen for valuable advice and comments on the PR4 (NPIPE) data release. The authors would like to thank the Spanish Agencia Estatal de Investigacion (AEI, MICIU) for the financial support provided under the project PID2019-110610RB-C21. JC also acknowledges financial support from the Concepcion Arenal Programme of the Universidad de Cantabria. MR also acknowledges financial support from the CSIC programme ‘Ayuda a la Incorporacion´ de Científicos Titulares’ provided under the project 202250I159. Some of the presented results are based on observations obtained with Planck6 an ESA science mission with instruments and contributions directly funded by ESA Member States, NASA, and Canada. This work made use of Python packages like pymaster (Alonso et al. 2019), astropy (Astropy Collaboration 2022), scipy (Virtanen et al. 2020), and matplotlib (Hunter 2007). Some of the results in this paper have been derived using the healpy (Zonca et al. 2019) and HEALPIX (Gorski et al. 2005) packages. We acknowledge the use of the PSM, developed by the Component Separation Working Group (WG2) of the Planck Collaboration.},
publisher = {Oxford University Press},
publisher = {Monthly Notices of the Royal Astronomical Society, 2023, 526(4), 5682-5698},
title = {An improved Compton parameter map of thermal Sunyaev–Zeldovich effect from Planck PR4 data},
author = {Chandran, Jyothis and Remazeilles, Mathieu and Barreiro Vilas, Rita Belén},
}