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Probing Cosmic Reionization and Molecular Gas Growth with TIME
- Source :
- The Astrophysical Journal. 915:33
- Publication Year :
- 2021
- Publisher :
- American Astronomical Society, 2021.
-
Abstract
- Line intensity mapping (LIM) provides a unique and powerful means to probe cosmic structures by measuring the aggregate line emission from all galaxies across redshift. The method is complementary to conventional galaxy redshift surveys that are object-based and demand exquisite point-source sensitivity. The Tomographic Ionized-carbon Mapping Experiment (TIME) will measure the star formation rate (SFR) during cosmic reionization by observing the redshifted [CII] 158$\mu$m line ($6 \lesssim z \lesssim 9$) in the LIM regime. TIME will simultaneously study the abundance of molecular gas during the era of peak star formation by observing the rotational CO lines emitted by galaxies at $0.5 \lesssim z \lesssim 2$. We present the modeling framework that predicts the constraining power of TIME on a number of observables, including the line luminosity function, and the auto- and cross-correlation power spectra, including synergies with external galaxy tracers. Based on an optimized survey strategy and fiducial model parameters informed by existing observations, we forecast constraints on physical quantities relevant to reionization and galaxy evolution, such as the escape fraction of ionizing photons during reionization, the faint-end slope of the galaxy luminosity function at high redshift, and the cosmic molecular gas density at cosmic noon. We discuss how these constraints can advance our understanding of cosmological galaxy evolution at the two distinct cosmic epochs for TIME, starting in 2021, and how they could be improved in future phases of the experiment.<br />Comment: 30 pages, 18 figures, accepted for publication in ApJ
- Subjects :
- Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
01 natural sciences
7. Clean energy
Observational cosmology
0103 physical sciences
Galaxy formation and evolution
010303 astronomy & astrophysics
Reionization
Astrophysics::Galaxy Astrophysics
Luminosity function (astronomy)
Physics
010308 nuclear & particles physics
Star formation
Intensity mapping
Astronomy and Astrophysics
Astrophysics - Astrophysics of Galaxies
Redshift
Galaxy
13. Climate action
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 915
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....f374ce49c4ae87580ef250c34fb99e0d