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Dissecting the high-z interstellar medium through intensity mapping cross-correlations

Serra, Paolo and Doré, Olivier and Lagache, Guilaine (2016) Dissecting the high-z interstellar medium through intensity mapping cross-correlations. Astrophysical Journal, 833 (2). Art. No. 153. ISSN 0004-637X.

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We explore the detection, with upcoming spectroscopic surveys, of three-dimensional power spectra of emission line fluctuations produced in different phases of the interstellar medium (ISM) by forbidden transitions of ionized carbon [C ii] (157.7 μm), ionized nitrogen [N ii] (121.9 and 205.2 μm), and neutral oxygen [O i] (145.5 μm) at redshift z > 4. These lines are important coolants of both the neutral and the ionized medium, and probe multiple phases of the ISM. In the framework of the halo model, we compute predictions of the three-dimensional power spectra for two different surveys, showing that they have the required sensitivity to detect cross-power spectra between the [C ii] line and both the [O i] line and the [N ii] lines with sufficient signal-to-noise ratio. The importance of cross-correlating multiple lines with the intensity mapping technique is twofold. On the one hand, we will have multiple probes of the different phases of the ISM, which is key to understanding the interplay between energetic sources, and the gas and dust at high redshift. This kind of study will be useful for a next-generation space observatory such as the NASA Far-IR Surveyor, which will probe the global star formation and the ISM of galaxies from the peak of star formation to the epoch of reionization. On the other hand, emission lines from external galaxies are an important foreground when measuring spectral distortions of the cosmic microwave background spectrum with future space-based experiments like PIXIE; measuring fluctuations in the intensity mapping regime will help constrain the mean amplitude of these lines, and will allow us to better handle this important foreground.

Item Type:Article
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URLURL TypeDescription Paper
Doré, Olivier0000-0002-5009-7563
Additional Information:© 2016 The American Astronomical Society. Received 2016 August 1; revised 2016 October 12; accepted 2016 October 18; published 2016 December 14. We thank Phil Bull, Tzu-Ching Chang, Abigail Crites, Roland de Putter and Paul Goldsmith for insightful discussions, and the organizers of the stimulating workshop "Opportunities and Challenges in Intensity Mapping" in Stanford. We acknowledge financial support from "Programme National de Cosmologie and Galaxies" (PNCG) of CNRS/INSU, France. P.S. acknowledges hospitality from the Laboratoire d'Astrophysique de Marseille, where part of this work was completed. Part of the research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Part of this work has been carried out thanks to the support of the OCEVU Labex (ANR-11-LABX-0060) and the A*MIDEX project (ANR-11-IDEX-0001-02) funded by the "Investissements d'Avenir" French government program managed by the ANR.
Funding AgencyGrant Number
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Institut national des sciences de l'Univers (INSU)UNSPECIFIED
Agence Nationale pour la Recherche (ANR)ANR-11-LABX-0060
Agence Nationale pour la Recherche (ANR)ANR-11-IDEX-0001-02
Subject Keywords:galaxies: ISM – infrared: diffuse background – large-scale structure of universe
Issue or Number:2
Record Number:CaltechAUTHORS:20161114-122838900
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Official Citation:Paolo Serra et al 2016 ApJ 833 153
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71995
Deposited By: Tony Diaz
Deposited On:15 Nov 2016 23:27
Last Modified:03 Oct 2019 16:13

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