# Probing Radio Intensity at High-Z from Marion: 2017 Instrument

@article{Philip2019ProbingRI,
title={Probing Radio Intensity at High-Z from Marion: 2017 Instrument},
author={L. Philip and Zuhra Abdurashidova and H. C. Chiang and N. Ghazi and Austin A. Gumba and Heiko Martin. Heilgendorff and Jack Hickish and J. M. J'auregui-Garc'ia and K. Malepe and Chuneeta D. Nunhokee and J. Peterson and Jonathan L. Sievers and V. Simes and R. Spann},
journal={Journal of Astronomical Instrumentation},
year={2019}
}
• Published 25 June 2018
• Physics
• Journal of Astronomical Instrumentation
We introduce Probing Radio Intensity at high-Z from Marion (PRIZM), a new experiment designed to measure the globally averaged sky brightness, including the expected redshifted 21[Formula: see text]cm neutral hydrogen absorption feature arising from the formation of the first stars. PRIZM consists of two dual-polarization antennas operating at central frequencies of 70 and 100[Formula: see text]MHz, and the experiment is located on Marion Island in the sub-Antarctic. We describe the initial…
41 Citations

## Figures from this paper

• Physics
• 2021
SARAS is an ongoing experiment aiming to detect the redshifted global 21-cm signal expected from Cosmic Dawn (CD) and the Epoch of Reionization (EoR). Standard cosmological models predict the signal

### Assessment of the Projection-induced Polarimetry Technique for Constraining the Foreground Spectrum in Global 21 cm Cosmology

• Physics
The Astrophysical Journal
• 2019
Detecting the cosmological sky-averaged (global) 21 cm signal as a function of observed frequency will provide a powerful tool to study the ionization and thermal history of the intergalactic medium

### Spectral index of the diffuse radio background between 50 and 100 MHz

• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
We report the spectral index of diffuse radio emission between 50 and 100 MHz from data collected with two implementations of the Experiment to Detect the Global EoR Signature (EDGES) low-band

### High-redshift 21cm Cosmology in Canada

• Physics
• 2019
In the next few years, the 21cm line will enable direct observations of the Dark Ages, Cosmic Dawn, and Reionization, which represent previously unexplored periods in our cosmic history. With a

### A tale of two sites – II. Inferring the properties of minihalo-hosted galaxies with upcoming 21-cm interferometers

• Physics
• 2020
The first generation of galaxies is expected to form in minihalos, accreting gas through ${\rm H}_2$ cooling, and possessing unique properties. Although unlikely to be directly detected in

### Spectral index of the Galactic foreground emission in the 50–87 MHz range

• Physics, Environmental Science
• 2020
Radiometry using individual dipole antennas is a potentially effective way to study the cosmological epoch referred to as Cosmic Dawn (z~20) through measurement of sky brightness arising from the

### Signature of excess radio background in the 21-cm global signal and power spectrum

• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
The recent tentative detection by the EDGES Low-Band antenna of the hydrogen 21-cm line from cosmic dawn, if confirmed, is the first ever signature observed from the epoch of primordial star

### A strong broadband 21 cm cosmological signal from dark matter spin-flip interactions

• Physics
Journal of Cosmology and Astroparticle Physics
• 2021
In the standard cosmology, it is believed that there are two relatively weak and distinct band-limited absorption features, with the first absorption minima near 20 MHz (z ∼ 70) and the other minima

### The first power spectrum limit on the 21-cm signal of neutral hydrogen during the Cosmic Dawn at z = 20–25 from LOFAR

• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
Observations of the redshifted 21-cm hyperfine line of neutral hydrogen from early phases of the Universe such as Cosmic Dawn and the Epoch of Reionization promise to open a new window onto the

### A Floating Octave Bandwidth Cone-Disk Antenna for Detection of Cosmic Dawn

• Physics
IEEE Transactions on Antennas and Propagation
• 2021
The critical component of radio astronomy radiometers built to detect redshifted 21 cm signals from Cosmic Dawn is the antenna element. We describe the design and performance of an octave bandwidth

## References

SHOWING 1-10 OF 20 REFERENCES

### BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal

• Physics
Publications of the Astronomical Society of Australia
• 2015
Abstract The redshifted 21cm line of neutral hydrogen (Hi), potentially observable at low radio frequencies (~50–200 MHz), should be a powerful probe of the physical conditions of the inter-galactic

### Design and characterization of the Large-aperture Experiment to Detect the Dark Age (LEDA) radiometer systems

• Physics
• 2017
The Large-Aperture Experiment to Detect the Dark Age (LEDA) was designed to detect the predicted O(100)mK sky-averaged absorption of the Cosmic Microwave Background by Hydrogen in the neutral pre-

### The Radio Background below 100 MHz

• Physics
• 2018
The recent detection of the “cosmic dawn” redshifted 21 cm signal at 78 MHz by the Experiment to Detect the Global EoR Signatures (EDGES) differs significantly from theoretical predictions. In

### Results from EDGES High-band. I. Constraints on Phenomenological Models for the Global 21 cm Signal

• Physics
• 2017
We report constraints on the global 21 cm signal due to neutral hydrogen at redshifts 14.8 ≥ z ≥ 6.5 . We derive our constraints from low-foreground observations of the average sky brightness

### A Space-based Observational Strategy for Characterizing the First Stars and Galaxies Using the Redshifted 21 cm Global Spectrum

• Physics
• 2017
The redshifted 21 cm monopole is expected to be a powerful probe of the epoch of the first stars and galaxies ( ). The global 21 cm signal is sensitive to the thermal and ionization state of hydrogen

### SARAS 2: a spectral radiometer for probing cosmic dawn and the epoch of reionization through detection of the global 21-cm signal

• Physics
• 2017
The global 21-cm signal from Cosmic Dawn (CD) and the Epoch of Reionization (EoR), at redshifts z∼6−30$z \sim 6-30$, probes the nature of first sources of radiation as well as physics of the

### Improved measurement of the spectral index of the diffuse radio background between 90 and 190 MHz

• Physics
• 2017
We report absolutely calibrated measurements of diffuse radio emission between 90 and 190 MHz from the Experiment to Detect the Global EoR Signature (EDGES). EDGES employs a wide beam zenith-pointing

### An absorption profile centred at 78 megahertz in the sky-averaged spectrum

• Physics
Nature
• 2018
The detection of a flattened absorption profile in the sky-averaged radio spectrum that is largely consistent with expectations for the 21-centimetre signal induced by early stars; however, the best-fitting amplitude of the profile is more than a factor of two greater than the largest predictions.

### Possible interaction between baryons and dark-matter particles revealed by the first stars

The analysis indicates that the spatial fluctuations of the 21-centimetre signal at cosmic dawn could be an order of magnitude larger than previously expected and that the dark-matter particle is no heavier than several proton masses, well below the commonly predicted mass of weakly interacting massive particles.

### Foreground Model and Antenna Calibration Errors in the Measurement of the Sky-averaged λ21 cm Signal at z~ 20

• Environmental Science
• 2015
The most promising near-term observable of the cosmic dark age prior to widespread reionization (z  ∼  15–200) is the sky-averaged λ21 cm background arising from hydrogen in the intergalactic medium.