J/A+A/688/A54 Planck CO revisited (Ghosh+, 2024)
Planck CO revisited:
Improved CO line emission maps from Planck space mission observations.
Ghosh S., Remazeilles M., Delabrouille D.
<Astron. Astrophys. 688, A54 (2024)>
=2024A&A...688A..54G 2024A&A...688A..54G (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Interstellar medium ; Carbon monoxide
Keywords: ISM: lines and bands - cosmology: observations
Abstract:
The Planck space mission has observed the first three rotational lines
of emission of Galactic 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 multi- component astrophysical
emissions from multi-frequency 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 CMB observations.
Description:
The Planck Revisited CO data products are a reprocessing of the
existing Planck CO data products to produce the cleanest full sky
Galactic CO maps. As a part of the full data release we are providing
the new Planck Revisited maps, jackknife noise maps, systematic error
estimates and 5-sigma reliability masks for the CO 1-0, 2-1 and 3-2
line emissions. We are also providing 100 noise simulations for
estimation of statistical uncertainty.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 97 304 List of fits files
fits/* . 4 Individual fits files of full sky Galactic CO
maps data products and Masks
co10_noise/* . 100 Individual fits files of noise simulation
HEALPix fits maps for CO 1-0
co21_noise/* . 100 Individual fits files of noise simulation
HEALPix fits maps for CO 2-1
co32_noise/* . 100 Individual fits files of noise simulation
HEALPix fits maps for CO 3-2
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Nx Number of pixels along X-axis
6- 13 I8 --- Ny Number of pixels along Y-axis
15- 21 I7 Kibyte size Size of FITS file
23- 45 A23 --- FileName Name of FITS file
47- 97 A51 --- Title Title of the FITS file
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Description of file: fits/PR_CO10.fit
Extension 1 - xGNILC CO10. HEALPix maps with NSIDE=1024 and lmax=2048 in
Galactic coordinates.
Field 0 - CO10 map in K_RJ km/s,
Field 1 - CO10 null map in K_RJ km/s,
Field 2 - CO10 systematic uncertainty in K_RJ km/s,
Field 3 - CO10 4sigma-15% confidence mask
Extension 2 - xGNILC beam. Binary table with lmax=2048
Column 0 - xGNILC beam transfer function
Description of file: fits/PR_CO21.fit
Extension 1 - xGNILC CO21. HEALPix maps with NSIDE=1024 and lmax=2048 in
Galactic coordinates.
Field 0 - CO21 map in K_RJ km/s,
Field 1 - CO21 null map in K_RJ km/s,
Field 2 - CO21 systematic uncertainty in K_RJ km/s,
Field 3 - CO21 4sigma-15% confidence mask
Extension 2 - xGNILC beam. Binary table with lmax=2048
Column 0 - xGNILC beam transfer function
Description of file: fits/PR_CO32.fit
Extension 1 - xGNILC CO32. HEALPix maps with NSIDE=1024 and lmax=2048 in
Galactic coordinates.
Field 0 - CO32 map in K_RJ km/s,
Field 1 - CO32 null map in K_RJ km/s,
Field 2 - CO32 systematic uncertainty in K_RJ km/s,
Field 3 - CO32 4sigma-15% confidence mask
Extension 2 - xGNILC beam. Binary table with lmax=2048
Column 0 - xGNILC beam transfer function
Description of file: fits/PR_masks.fit
Extension 1 - Preproc masks. HEALPix maps with NSIDE=2048 in Galactic
coordinates.
Field 0 - Bright region mask
Field 1 - Select point source fill mask
Field 2 - tSZ source mask
Field 3 - negative bright source mask
Description of files: co10noise/co10n*.fit
Simulated xGNILC CO 1-0 noise HEALPix map at NSIDE=1024 in Galactic
coordinates, in K_RJ km/s. The wildcard in the filename goes from 00
to 99 for 100 independent noise realizations.
Description of files: co21noise/co21n*.fit
Simulated xGNILC CO 2-1 noise HEALPix map at NSIDE=1024 in Galactic
coordinates, in K_RJ km/s. The wildcard in the filename goes from 00
to 99 for 100 independent noise realizations.
Description of files: co32noise/co32n*.fit
Simulated xGNILC CO 3-2 noise HEALPix map at NSIDE=1024 in Galactic
coordinates, in K_RJ km/s. The wildcard in the filename goes from 00
to 99 for 100 independent noise realizations.
History:
From Shamik Ghosh, shamik(at)lbl.gov
Acknowledgements:
The authors acknowledge useful discussions with Francois Boulanger,
Jean- Loup Puget, and Reijo Keskitalo. MR acknowledges support from
the CSIC program Ayuda a la Incorporacion de Cientificos Titulares
provided under the project 202250I159. Some of the results in this
paper have been derived using the HEALPix python package.
(End) Patricia Vannier [CDS] 30-May-2024