Articles with "intensity mapping" as a keyword



Photo by jamesbold from unsplash

High-redshift post-reionization cosmology with 21cm intensity mapping

Sign Up to like & get
recommendations!
Published in 2018 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2018/05/004

Abstract: We investigate the possibility of performing cosmological studies in the redshift range $2.5 read more here.

Keywords: cosmology; sigma; 21cm intensity; intensity mapping ... See more keywords
Photo from wikipedia

Constraining beyond ΛCDM models with 21cm intensity mapping forecasted observations combined with latest CMB data

Sign Up to like & get
recommendations!
Published in 2022 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2022/01/018

Abstract: We explore constraints on dark energy and modified gravity with forecasted 21cm intensity mapping measurements using the Effective Field Theory approach. We construct a realistic mock data set forecasting a low redshift 21cm signal power… read more here.

Keywords: intensity mapping; cmb data; combined latest; 21cm intensity ... See more keywords
Photo by bryangoffphoto from unsplash

Cross-Correlation Forecast of CSST Spectroscopic Galaxy and MeerKAT Neutral Hydrogen Intensity Mapping Surveys

Sign Up to like & get
recommendations!
Published in 2023 at "Research in Astronomy and Astrophysics"

DOI: 10.1088/1674-4527/accdc0

Abstract: Cross-correlating the data of neutral hydrogen (HI) 21cm intensity mapping with galaxy surveys is an effective method to extract astrophysical and cosmological information. In this work, we investigate the cross-correlation of MeerKAT single-dish mode HI… read more here.

Keywords: cross correlation; galaxy; intensity mapping; csst ... See more keywords
Photo from wikipedia

Gaussian Process Regression for foreground removal in HI intensity mapping experiments

Sign Up to like & get
recommendations!
Published in 2021 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stab2594

Abstract: We apply for the first time Gaussian Process Regression (GPR) as a foreground removal technique in the context of single-dish, low redshift H i intensity mapping, and present an open-source python toolkit for doing so. We… read more here.

Keywords: frequency; foreground; intensity mapping; foreground removal ... See more keywords
Photo by anniespratt from unsplash

Towards 21-cm Intensity Mapping at z = 2.28 with uGMRT using the Tapered Gridded Estimator I: Foreground Avoidance

Sign Up to like & get
recommendations!
Published in 2022 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stac2419

Abstract: The post-reionization (z ≤ 6) neutral hydrogen (H i ) 21-cm intensity mapping signal holds the potential to probe the large scale structures, study the expansion history and constrain various cosmological parameters. Here we apply the Tapered… read more here.

Keywords: omega small; foreground avoidance; tapered gridded; gridded estimator ... See more keywords
Photo from wikipedia

Constraining the CO intensity mapping power spectrum at intermediate redshifts

Sign Up to like & get
recommendations!
Published in 2018 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stx3250

Abstract: We compile available constraints on the carbon monoxide (CO) 1-0 luminosity functions and abundances at redshifts 0-3. This is used to develop a data driven halo model for the evolution of the CO galaxy abundances… read more here.

Keywords: intermediate redshifts; intensity mapping; power spectrum;
Photo from wikipedia

Measuring cosmic velocities with 21 cm intensity mapping and galaxy redshift survey cross-correlation dipoles

Sign Up to like & get
recommendations!
Published in 2017 at "Physical Review D"

DOI: 10.1103/physrevd.95.043530

Abstract: We investigate the feasibility of measuring the effects of peculiar velocities in large-scale structure using the dipole of the redshift-space cross-correlation function. We combine number counts of galaxies with brightness-temperature fluctuations from 21cm intensity mapping,… read more here.

Keywords: intensity; cross correlation; intensity mapping; redshift ... See more keywords
Photo by neom from unsplash

Cosmic Expansion History from Line-Intensity Mapping.

Sign Up to like & get
recommendations!
Published in 2019 at "Physical review letters"

DOI: 10.1103/physrevlett.123.251301

Abstract: 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… read more here.

Keywords: expansion history; intensity mapping; history; expansion ... See more keywords
Photo from wikipedia

Target Detection and Tracking With Errors in Intensity and Mapping Dimensions

Sign Up to like & get
recommendations!
Published in 2019 at "IEEE Access"

DOI: 10.1109/access.2019.2927532

Abstract: This paper addresses an engineering problem that measurement errors in intensity and mapping dimensions exist in the track-before-detect (TBD) architecture simultaneously. Drawing lessons from the probability data association (PDA) and the basic generalized likelihood ratio… read more here.

Keywords: target detection; errors intensity; intensity mapping; tbd ... See more keywords
Photo from wikipedia

Experiment for cryogenic large-aperture intensity mapping: instrument design

Sign Up to like & get
recommendations!
Published in 2021 at "Journal of Astronomical Telescopes, Instruments, and Systems"

DOI: 10.1117/1.jatis.7.4.044004

Abstract: Abstract. The experiment for cryogenic large-aperture intensity mapping (EXCLAIM) is a balloon-borne telescope designed to survey star formation in windows from the present to z  =  3.5. During this time, the rate of star formation dropped dramatically,… read more here.

Keywords: experiment cryogenic; intensity; cryogenic large; intensity mapping ... See more keywords