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Line-intensity mapping (LIM) of emission from star-forming galaxies can be used to measure the baryon acoustic oscillation (BAO) scale as far back as the epoch of reionization. This provides a standard cosmic ruler to constrain the…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-21 José Luis Bernal , Patrick C. Breysse , Ely D. Kovetz

Line intensity mapping (LIM) serves as a potent probe in astrophysics, relying on the statistical analysis of integrated spectral line emissions originating from distant star-forming galaxies. While LIM observations hold the promise of…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-25 Anirban Roy , Nicholas Battaglia

Mapping of multiple lines such as the fine-structure emission from [CII] (157.7 $\mu \text{m}$), [OIII] (52 \& 88.4 $\mu \text{m}$), and rotational emission lines from CO are of particular interest for upcoming line intensity mapping (LIM)…

Intensity mapping has attracted significant interest as an approach to measure the properties of the interstellar medium in typical galaxies at high redshift. Intensity mapping measures the statistics of surface brightness as a function of…

Cosmology and Nongalactic Astrophysics · Physics 2019-02-20 E. R. Switzer , C. J. Anderson , A. R. Pullen , S. Yang

Line intensity mapping (LIM) is a promising observational method to probe large-scale fluctuations of line emission from distant galaxies. Data from wide-field LIM observations allow us to study the large-scale structure of the universe as…

Astrophysics of Galaxies · Physics 2021-01-13 Kana Moriwaki , Masato Shirasaki , Naoki Yoshida

Line-intensity mapping (LIM) experiments coming online now will survey fluctuations in aggregate emission in the [C II] ionized carbon line from galaxies at the end of reionization. Experimental progress must be matched by theoretical…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-18 Patrick Horlaville , Dongwoo T. Chung , J. Richard Bond , Lichen Liang

The epoch of reionization (EoR) offers a unique window into the dawn of galaxy formation, through which high-redshift galaxies can be studied by observations of both themselves and their impact on the intergalactic medium. Line intensity…

Cosmology and Nongalactic Astrophysics · Physics 2023-06-14 Guochao Sun , Lluís Mas-Ribas , Tzu-Ching Chang , Steven R. Furlanetto , Richard H. Mebane , Michael O. Gonzalez , Jasmine Parsons , A. C. Trapp

Line-intensity mapping (LIM or IM) is an emerging field of observational work, with strong potential to fit into a larger effort to probe large-scale structure and small-scale astrophysical phenomena using multiple complementary tracers.…

Line-intensity mapping (LIM) is emerging as a powerful probe of the high-redshift Universe, with a growing number of LIM experiments targeting various spectral lines deep into the epochs of reionization and cosmic dawn. A key remaining…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-29 Sarah Libanore , Julian B. Munoz , Ely D. Kovetz

One of the toughest challenges in modern cosmology is to probe the small scales $k \sim 0.5\,$Mpc$^{-1}$ in the matter power spectrum and clustering. We show that such small scales will be accessible via upcoming line-intensity mapping…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-21 Sarah Libanore , Caner Unal , Debanjan Sarkar , Ely D. Kovetz

We present a stack of data from the second season of the CO Mapping Array Project (COMAP) Pathfinder on the positions of quasars from eBOSS and DESI. COMAP is a Line Intensity Mapping (LIM) experiment targeting dense molecular gas via…

We present a detection of molecular gas emission at $z\sim1-5$ using the technique of line intensity mapping. We make use of a pair of 3 mm interferometric data sets, the first from the ALMA Spectroscopic Survey in the Hubble Ultra Deep…

Astrophysics of Galaxies · Physics 2020-10-07 Garrett K. Keating , Daniel P. Marrone , Geoffrey C. Bower , Ryan P. Keenan

The H-alpha line emission is an important probe for a number of fundamental quantities in galaxies, including their number density, star formation rate (SFR) and overall gas content. A new generation of low-resolution intensity mapping…

Astrophysics of Galaxies · Physics 2022-06-15 Marta B. Silva , Saleem Zaroubi , Robin Kooistra , Asantha Cooray

We present a systematic study of the intensity mapping technique using updated models for the different emission lines from galaxies and identify which ones are more promising for cosmological studies of the post reionization epoch. We…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-25 José Fonseca , Marta B. Silva , Mário G. Santos , Asantha Cooray

Line intensity mapping (LIM) is an emerging technique for probing the large-scale structure (LSS) in the post-reionisation era. This captures the integrated flux of a particular spectral line emission from multiple sources within a patch of…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-30 Manas Mohit Dosibhatla , Suman Majumdar , Chandra Shekhar Murmu , Samit Kumar Pal , Saswata Dasgupta , Satadru Bag , Abhirup Datta

Line-intensity mapping (LIM) is quickly attracting attention as an alternative technique to probe large-scale structure and galaxy formation and evolution at high redshift. LIM one-point statistics are motivated because they provide access…

Cosmology and Nongalactic Astrophysics · Physics 2024-03-06 José Luis Bernal

The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a balloon-borne cryogenic telescope that will survey the spectrum of diffuse emission from both the Milky Way and the cosmic web to probe star formation, the…

Line-intensity mapping (LIM) surveys will characterise the cosmological large-scale structure of emissivity in a range of atomic and molecular spectral lines, but existing literature rarely considers whether these surveys can recover…

Cosmology and Nongalactic Astrophysics · Physics 2023-12-14 Dongwoo T. Chung

The evolution of large-scale structure, galaxies and the intergalactic medium (IGM) during the Epoch of Reionization (EoR) can be probed by upcoming Line Intensity Mapping (LIM) experiments, which sample in redshift and direction without…

Next-generation tests of fundamental physics and cosmology using large scale structure require measurements over large volumes of the Universe, including high redshifts inaccessible to present-day surveys. Line intensity mapping, an…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-15 Kirit S. Karkare , Azadeh Moradinezhad Dizgah , Garrett K. Keating , Patrick Breysse , Dongwoo T. Chung