Issue |
A&A
Volume 688, August 2024
|
|
---|---|---|
Article Number | A54 | |
Number of page(s) | 20 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361/202348932 | |
Published online | 02 August 2024 |
Planck CO revisited: Improved CO line-emission maps from Planck space-mission observations★
1
Lawrence Berkeley National Laboratory,
1 Cyclotron Road,
Berkeley,
CA
94720,
USA
e-mail: shamik@lbl.gov
2
Instituto de Fisica de Cantabria (CSIC-UC),
Avda. los Castros s/n,
39005
Santander,
Spain
e-mail: remazeilles@ifca.unican.es
3
CNRS-UCB International Research Laboratory, Centre Pierre Binétruy,
IRL 2007, CPB-IN2P3,
Berkeley,
CA
94720,
USA
e-mail: delabrouille@apc.in2p3.fr
Received:
13
December
2023
Accepted:
5
April
2024
The Planck space mission has observed the first three rotational lines of emission of Galactic carbon monoxide (CO). Those maps, however, are either noisy or contaminated by astrophysical emissions from different origin. We revisit those data products to deliver new full-sky CO maps with low astrophysical contamination and significantly enhanced noise properties. To that effect, a specific pipeline is designed to evaluate and postprocess the existing Planck Galactic CO maps. Specifically, we use an extension of the generalized needlet Internal Linear Combination method to extract multicomponent astrophysical emissions from multifrequency observations. Well-characterized, clean, CO full-sky maps at 10′ angular resolution are produced. These maps are made available to the scientific community and can be used to trace CO emission over the entire sky and to generate sky simulations in preparation for future cosmic microwave background (CMB) observations.
Key words: ISM: lines and bands / cosmology: observations
A copy of the maps as FITS files is available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A54
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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