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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.…

The Cosmic Gamma-ray Background (CGB) in the MeV regime has been measured with COMPTEL and SMM. The origin of the CGB in this energy regime is believed to be dominated by gamma-rays from Type Ia supernovae. We calculate the CGB spectrum…

Astrophysics · Physics 2015-06-24 K. Watanabe , D. H. Hartmann , M. D. Leising , L. -S. The

Optical emission line diagnostics, which are a common tool to constrain the properties of the interstellar medium (ISM) of galaxies, become progressively inaccessible at higher redshifts for ground-based facilities. Far-infrared (FIR)…

Astrophysics of Galaxies · Physics 2024-07-17 Alice Schimek , Claudia Cicone , Sijing Shen , Davide Decataldo , Pamela Klaassen , Lucio Mayer

Extragalactic carbon monoxide (CO) line emission will likely be an important signal in current and future Cosmic Microwave Background (CMB) surveys on small scales. However, great uncertainty surrounds our current understanding of CO…

Cosmology and Nongalactic Astrophysics · Physics 2025-06-23 Yogesh Mehta , Anirban Roy , Simon Foreman , Alexander van Engelen , Nick Battaglia

(abr.) We consider the potential of future microwave spectrometers akin to PIXIE in light of the sky-averaged global signal expected from the total intensity of extragalactic carbon monoxide (CO) and ionized carbon ([CII]) line emission. We…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-12 Dongwoo T Chung , Jens Chluba , Patrick C Breysse

We present experimental and theoretical results of a detailed study of laser-induced continuum structures (LICS) in the photoionization continuum of helium out of the metastable state 2s $^1S_0$. The continuum dressing with a 1064 nm laser,…

Atomic Physics · Physics 2016-09-08 L. P. Yatsenko , T. Halfmann , B. W. Shore , K. Bergmann

Gas cooling processes in the interstellar medium (ISM) are key to understanding how star-formation processes occur in galaxies. Far-infrared (FIR) fine-structure emission lines can be used as a tool to understand the gas conditions and…

Astrophysics of Galaxies · Physics 2023-12-06 Andrés Felipe Ramos Padilla , Lingyu Wang , F. F. S. van der Tak , Scott Trager

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

The Cosmic Infrared Background (CIB), traced by the emission from dusty star-forming galaxies, provides a crucial window into the phases of star formation throughout cosmic history. These galaxies, although challenging to detect…

Cosmology and Nongalactic Astrophysics · Physics 2024-12-18 Giorgia Zagatti , Erminia Calabrese , Caterina Chiocchetta , Martina Gerbino , Mattia Negrello , Luca Pagano

The 21 cm intensity mapping (IM) technique provides us with an efficient way to observe the cosmic large-scale structure (LSS). From the LSS data, one can use the baryon acoustic oscillation and redshift space distortion to trace the…

Cosmology and Nongalactic Astrophysics · Physics 2023-06-07 Peng-Ju Wu , Yichao Li , Jing-Fei Zhang , Xin Zhang

Context. The Fred Young Submillimeter Telescope (FYST) line intensity mapping (LIM) survey will measure the power spectrum (PS) of the singly ionized carbon 158 $\rm \mu$m fine-structure line, [CII], to trace the appearance of the first…

Astrophysics of Galaxies · Physics 2024-10-24 C. Karoumpis , B. Magnelli , E. Romano-Díaz , K. Garcia , A. Dev , J. Clarke , T. -M. Wang , T. Badescu , D. Riechers , F. Bertoldi

Understanding the formation and evolution of the Universe is crucial for cosmological studies, and the line intensity mapping provides a powerful tool for this kind of study. We propose to make use of multipole moments of redshift-space…

Cosmology and Nongalactic Astrophysics · Physics 2020-05-20 Yan Gong , Xuelei Chen , Asantha Cooray

We use analytic computations to predict the power spectrum as well as the bispectrum of Cosmic Infrared Background (CIB) anisotropies. Our approach is based on the halo model and takes into account the mean luminosity-mass relation. The…

Cosmology and Nongalactic Astrophysics · Physics 2020-01-08 Robert Reischke , Vincent Desjacques , Saleem Zaroubi

Current and future generations of intensity mapping surveys promise dramatic improvements in our understanding of galaxy evolution and large-scale structure. An intensity map provides a census of the cumulative emission from all galaxies in…

Cosmology and Nongalactic Astrophysics · Physics 2021-10-05 Trevor M. Oxholm , Eric R. Switzer

Line intensity mapping (LIM) has emerged as a promising tool for probing the 3D large-scale structure through the aggregate emission of spectral lines. The presence of interloper lines poses a crucial challenge in extracting the signal from…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-22 Yun-Ting Cheng , Kailai Wang , Benjamin D. Wandelt , Tzu-Ching Chang , Olivier Doré

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

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

We present a quantitative model of Lyman-alpha (Ly-alpha) emission throughout cosmic history and determine the prospects for intensity mapping of spatial fluctuations in the Ly-alpha signal. Since i) our model assumes at z>6 the minimum…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Anthony Pullen , Olivier Dore , Jamie Bock

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) offers a novel avenue to observe and characterize our universe. LIM data of CO spectral lines are becoming available, such as those obtained by the CO Mapping Array Project (COMAP). COMAP data can be used to…