Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground
International audience High resolution cosmic microwave background (CMB) experiments have allowed us to precisely measure the CMB temperature power spectrum down to very small scales (multipole $\ell \sim 3000$). Such measurements at multiple frequencies enable separating the primary CMB anisotropie...
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ftinsu:oai:HAL:hal-03982573v1 2023-07-16T04:00:55+02:00 Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground Maniyar, Abhishek S. Gkogkou, Athanasia Coulton, William R. Li, Zack Lagache, Guilaine Pullen, Anthony R. Laboratoire d'Astrophysique de Marseille (LAM) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) 2023 https://hal.science/hal-03982573 https://doi.org/10.1103/PhysRevD.107.123504 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/2301.10764 info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.107.123504 hal-03982573 https://hal.science/hal-03982573 ARXIV: 2301.10764 doi:10.1103/PhysRevD.107.123504 INSPIRE: 2626540 Phys.Rev.D https://hal.science/hal-03982573 Phys.Rev.D, 2023, 107 (12), pp.123504. ⟨10.1103/PhysRevD.107.123504⟩ [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1103/PhysRevD.107.123504 2023-06-28T16:23:13Z International audience High resolution cosmic microwave background (CMB) experiments have allowed us to precisely measure the CMB temperature power spectrum down to very small scales (multipole $\ell \sim 3000$). Such measurements at multiple frequencies enable separating the primary CMB anisotropies with other signals like CMB lensing, thermal and kinematic Sunyaev-Zel'dovich effects (tSZ and kSZ), and cosmic infrared background (CIB). In this paper, we explore another signal of interest at these frequencies that should be present in the CMB maps: extragalactic CO molecular rotational line emissions, which are the most widely used tracers of molecular gas in the line intensity mapping experiments. Using the SIDES simulations adopted for top hat bandpasses at 150 and 220 GHz, we show that the cross-correlation of the CIB with CO lines has a contribution similar to the CIB-tSZ correlation and the kSZ power, thereby contributing a non-negligible amount to the total power at these scales. This signal, therefore, may significantly impact the recently reported $\geq 3\sigma$ detection of the kSZ power spectrum from the South Pole Telescope (SPT) collaboration, as the contribution of the CO lines is not considered in such analyses. Our results also provide a new way of measuring the CO power spectrum in cross-correlation with the CIB. Finally, these results show that the CO emissions present in the CMB maps will have to be accounted for in all the CMB auto-power spectrum and cross-correlation studies involving a LSS tracer. Article in Journal/Newspaper South pole Institut national des sciences de l'Univers: HAL-INSU South Pole Physical Review D 107 12 |
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Institut national des sciences de l'Univers: HAL-INSU |
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English |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Maniyar, Abhishek S. Gkogkou, Athanasia Coulton, William R. Li, Zack Lagache, Guilaine Pullen, Anthony R. Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience High resolution cosmic microwave background (CMB) experiments have allowed us to precisely measure the CMB temperature power spectrum down to very small scales (multipole $\ell \sim 3000$). Such measurements at multiple frequencies enable separating the primary CMB anisotropies with other signals like CMB lensing, thermal and kinematic Sunyaev-Zel'dovich effects (tSZ and kSZ), and cosmic infrared background (CIB). In this paper, we explore another signal of interest at these frequencies that should be present in the CMB maps: extragalactic CO molecular rotational line emissions, which are the most widely used tracers of molecular gas in the line intensity mapping experiments. Using the SIDES simulations adopted for top hat bandpasses at 150 and 220 GHz, we show that the cross-correlation of the CIB with CO lines has a contribution similar to the CIB-tSZ correlation and the kSZ power, thereby contributing a non-negligible amount to the total power at these scales. This signal, therefore, may significantly impact the recently reported $\geq 3\sigma$ detection of the kSZ power spectrum from the South Pole Telescope (SPT) collaboration, as the contribution of the CO lines is not considered in such analyses. Our results also provide a new way of measuring the CO power spectrum in cross-correlation with the CIB. Finally, these results show that the CO emissions present in the CMB maps will have to be accounted for in all the CMB auto-power spectrum and cross-correlation studies involving a LSS tracer. |
author2 |
Laboratoire d'Astrophysique de Marseille (LAM) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Maniyar, Abhishek S. Gkogkou, Athanasia Coulton, William R. Li, Zack Lagache, Guilaine Pullen, Anthony R. |
author_facet |
Maniyar, Abhishek S. Gkogkou, Athanasia Coulton, William R. Li, Zack Lagache, Guilaine Pullen, Anthony R. |
author_sort |
Maniyar, Abhishek S. |
title |
Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground |
title_short |
Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground |
title_full |
Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground |
title_fullStr |
Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground |
title_full_unstemmed |
Extragalactic CO emission lines in the CMB experiments: a forgotten signal and a foreground |
title_sort |
extragalactic co emission lines in the cmb experiments: a forgotten signal and a foreground |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-03982573 https://doi.org/10.1103/PhysRevD.107.123504 |
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South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Phys.Rev.D https://hal.science/hal-03982573 Phys.Rev.D, 2023, 107 (12), pp.123504. ⟨10.1103/PhysRevD.107.123504⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2301.10764 info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevD.107.123504 hal-03982573 https://hal.science/hal-03982573 ARXIV: 2301.10764 doi:10.1103/PhysRevD.107.123504 INSPIRE: 2626540 |
op_doi |
https://doi.org/10.1103/PhysRevD.107.123504 |
container_title |
Physical Review D |
container_volume |
107 |
container_issue |
12 |
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1771550269302112256 |