Jack O. Burns
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View article: Why every solar eclipse viewing event needs a disco ball
Why every solar eclipse viewing event needs a disco ball Open
Solar eclipses offer unparalleled opportunities for public engagement in astronomy. Large groups of people often gather to view eclipses, and these events require affordable and easy-to-use tools to safely observe the Sun. One unique way t…
View article: The Wrath of KAN: Enabling Fast, Accurate, and Transparent Emulation of the Global 21 cm Cosmology Signal
The Wrath of KAN: Enabling Fast, Accurate, and Transparent Emulation of the Global 21 cm Cosmology Signal Open
Based on the Kolmogorov–Arnold network (KAN), we present a novel emulator of the global 21 cm cosmology signal, 21 cm KAN, that provides extremely fast training speed while achieving nearly equivalent accuracy to the most accurate emulator…
View article: Emulating Global 21 cm Cosmology Observations from the Lunar Far Side to Achieve Quick and Reliable Physical Constraints
Emulating Global 21 cm Cosmology Observations from the Lunar Far Side to Achieve Quick and Reliable Physical Constraints Open
Efforts are underway to measure the global 21 cm signal from neutral hydrogen, which is a powerful probe of the early universe, using NASA radio telescopes on the far side of the Moon. Physics-based models of the signal are computationally…
View article: Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside
Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside Open
The search for habitable conditions beyond Earth is a top priority in astrophysics. The discovery of habitable exoplanets beyond our solar system will require a suite of instruments providing long-term monitoring for detection (e.g. with s…
View article: Practice Makes Perfect: A Study of Digital Twin Technology for Assembly and Problem-solving using Lunar Surface Telerobotics
Practice Makes Perfect: A Study of Digital Twin Technology for Assembly and Problem-solving using Lunar Surface Telerobotics Open
Robotic systems that can traverse planetary or lunar surfaces to collect environmental data and perform physical manipulation tasks, such as assembling equipment or conducting mining operations, are envisioned to form the backbone of futur…
View article: 21cmlstm: A Fast Memory-based Emulator of the Global 21 cm Signal with Unprecedented Accuracy
21cmlstm: A Fast Memory-based Emulator of the Global 21 cm Signal with Unprecedented Accuracy Open
Neural network (NN) emulators of the global 21 cm signal need an emulation error much less than the observational noise in order to be used to perform unbiased Bayesian parameter inference. To this end, we introduce 21cmLSTM —a long short-…
View article: MEDEA: A New Model for Emulating Radio Antenna Beam Patterns for 21 cm Cosmology and Antenna Design Studies
MEDEA: A New Model for Emulating Radio Antenna Beam Patterns for 21 cm Cosmology and Antenna Design Studies Open
In 21 cm experimental cosmology, accurate characterization of a radio telescope’s antenna beam response is essential to measure the 21 cm signal. Computational electromagnetic (CEM) simulations estimate the antenna beam pattern and frequen…
View article: $\texttt{21cmLSTM}$: A Fast Memory-based Emulator of the Global 21 cm Signal with Unprecedented Accuracy
$\texttt{21cmLSTM}$: A Fast Memory-based Emulator of the Global 21 cm Signal with Unprecedented Accuracy Open
Neural network (NN) emulators of the global 21 cm signal need emulation error much less than the observational noise in order to be used to perform unbiased Bayesian parameter inference. To this end, we introduce $\texttt{21cmLSTM}$ -- a l…
View article: $\texttt{MEDEA}$: A New Model for Emulating Radio Antenna Beam Patterns for 21-cm Cosmology and Antenna Design Studies
$\texttt{MEDEA}$: A New Model for Emulating Radio Antenna Beam Patterns for 21-cm Cosmology and Antenna Design Studies Open
In 21-cm experimental cosmology, accurate characterization of a radio telescope's antenna beam response is essential to measure the 21-cm signal. Computational electromagnetic (CEM) simulations estimate the antenna beam pattern and frequen…
View article: FarView: An in-situ manufactured lunar far side radio array concept for 21-cm Dark Ages cosmology
FarView: An in-situ manufactured lunar far side radio array concept for 21-cm Dark Ages cosmology Open
FarView is an early-stage concept for a large, low-frequency radio observatory, manufactured in-situ on the lunar far side using metals extracted from the lunar regolith. It consists of 100,000 dipole antennas in compact subarrays distribu…
View article: FarView: An In-Situ Manufactured Lunar Far Side Radio Array Concept for 21-cm Dark Ages Cosmology
FarView: An In-Situ Manufactured Lunar Far Side Radio Array Concept for 21-cm Dark Ages Cosmology Open
FarView is an early-stage concept for a large, low-frequency radio observatory, manufactured in-situ on the lunar far side using metals extracted from the lunar regolith. It consists of 100,000 dipole antennas in compact subarrays distribu…
View article: Fitting and Comparing Galactic Foreground Models for Unbiased 21 cm Cosmology
Fitting and Comparing Galactic Foreground Models for Unbiased 21 cm Cosmology Open
Accurate detection of the cosmological 21 cm global signal requires galactic foreground models that can remove power over 10 6 . Although foreground and global signal models unavoidably exhibit overlap in their vector spaces inducing bias …
View article: Validating Posteriors Obtained by an Emulator When Jointly Fitting Mock Data of the Global 21 cm Signal and High-z Galaxy UV Luminosity Function
Validating Posteriors Obtained by an Emulator When Jointly Fitting Mock Data of the Global 21 cm Signal and High-z Galaxy UV Luminosity Function Open
Although neural-network-based emulators enable efficient parameter estimation in 21 cm cosmology, the accuracy of such constraints is poorly understood. We employ nested sampling to fit mock data of the global 21 cm signal and high- z gala…
View article: Validating posteriors obtained by an emulator when jointly-fitting mock data of the global 21-cm signal and high-z galaxy UV luminosity function
Validating posteriors obtained by an emulator when jointly-fitting mock data of the global 21-cm signal and high-z galaxy UV luminosity function Open
Although neural-network-based emulators enable efficient parameter estimation in 21-cm cosmology, the accuracy of such constraints is poorly understood. We employ nested sampling to fit mock data of the global 21-cm signal and high-$z$ gal…
View article: Fitting and Comparing Galactic Foreground Models for Unbiased 21-cm Cosmology
Fitting and Comparing Galactic Foreground Models for Unbiased 21-cm Cosmology Open
Accurate detection of the cosmological 21-cm global signal requires galactic foreground models which can remove power over ~$10^6$. Although foreground and global signal models unavoidably exhibit overlap in their vector-spaces inducing bi…
View article: Constraining a Model of the Radio Sky below 6 MHz Using the Parker Solar Probe/FIELDS Instrument in Preparation for Upcoming Lunar-based Experiments
Constraining a Model of the Radio Sky below 6 MHz Using the Parker Solar Probe/FIELDS Instrument in Preparation for Upcoming Lunar-based Experiments Open
We present a Bayesian analysis of data from the FIELDS instrument on board the Parker Solar Probe (PSP) spacecraft with the aim of constraining low-frequency (≲6 MHz) sky in preparation for several upcoming lunar-based experiments. We util…
View article: LuSEE 'Night': The Lunar Surface Electromagnetics Experiment
LuSEE 'Night': The Lunar Surface Electromagnetics Experiment Open
The Lunar Surface Electromagnetics Explorer 'LuSEE Night' is a low frequency radio astronomy experiment that will be delivered to the farside of the Moon by the NASA Commercial Lunar Payload Services (CLPS) program in late 2025 or early 20…
View article: Constraining a Model of the Radio Sky Below 6 MHz Using the Parker Solar Probe/FIELDS Instrument in Preparation for Upcoming Lunar-based Experiments
Constraining a Model of the Radio Sky Below 6 MHz Using the Parker Solar Probe/FIELDS Instrument in Preparation for Upcoming Lunar-based Experiments Open
We present a Bayesian analysis of data from the FIELDS instrument on board the Parker Solar Probe (PSP) spacecraft with the aim of constraining low frequency ($\lesssim$ 6 MHz) sky in preparation for several upcoming lunar-based experiment…
View article: The Frontier in 21-cm Cosmology from the Farside of the Moon
The Frontier in 21-cm Cosmology from the Farside of the Moon Open
The Farside Array for Radio Science Investigations of the Dark ages and Exoplanets (FARSIDE) is a NASA funded probe-class mission concept to place a radio array (100 kHz -40 MHz) on the far side of the Moon [1].The nominal array design con…
View article: Witnessing a Galaxy Cluster Merger with JWST and a Chandra X-Ray Temperature Map
Witnessing a Galaxy Cluster Merger with JWST and a Chandra X-Ray Temperature Map Open
The first James Webb Space Telescope (JWST) image released was of galaxy cluster SMACSJ0723.3-7327, a lensing cluster at z = 0.39 showing detail only JWST can provide. While the majority of the focus has been on the brilliantly lensed gala…
View article: Witnessing a Galaxy Cluster Merger with JWST and a Chandra X-ray Temperature Map
Witnessing a Galaxy Cluster Merger with JWST and a Chandra X-ray Temperature Map Open
The first James Webb Space Telescope (JWST) image released was of galaxy cluster SMACSJ0723.3- 7327, a lensing cluster at z=0.39 showing detail only JWST can provide. While the majority of the focus has been on the brilliantly lensed galax…
View article: On the origin of diffuse radio emission in Abell 85 – insights from new GMRT observations
On the origin of diffuse radio emission in Abell 85 – insights from new GMRT observations Open
Extended, steep, and ultra-steep spectrum radio emission in a galaxy cluster is usually associated with recent mergers. Simulations show that radio phoenixes are aged radio galaxy lobes whose emission reactivates when a low Mach shock comp…
View article: On the Origin of Diffuse Radio Emission in Abell 85 -- Insights from new\n GMRT Observations
On the Origin of Diffuse Radio Emission in Abell 85 -- Insights from new\n GMRT Observations Open
Extended, steep, and ultra-steep spectrum radio emission in a galaxy cluster\nis usually associated with recent mergers. Simulations show that radio\nphoenixes are aged radio galaxy lobes whose emission reactivates when a low\nMach shock c…
View article: Constraining Warm Dark Matter and Population III Stars with the Global 21 cm Signal
Constraining Warm Dark Matter and Population III Stars with the Global 21 cm Signal Open
Upcoming ground- and space-based experiments may have sufficient accuracy to place significant constraints upon high-redshift star formation, Reionization, and dark matter (DM) using the global 21 cm signal of the intergalactic medium. In …
View article: Virtual Reality Digital Twin and Environment for Troubleshooting Lunar-based Infrastructure Assembly Failures
Virtual Reality Digital Twin and Environment for Troubleshooting Lunar-based Infrastructure Assembly Failures Open
Humans and robots will need to collaborate in order to create a sustainable human lunar presence by the end of the 2020s. This includes cases in which a human will be required to teleoperate an autonomous rover that has encountered an inst…
View article: How to Deploy a 10-km Interferometric Radio Telescope on the Moon with Just Four Tethered Robots
How to Deploy a 10-km Interferometric Radio Telescope on the Moon with Just Four Tethered Robots Open
The Far-side Array for Radio Science Investigations of the Dark ages and\nExoplanets (FARSIDE) is a proposed mission concept to the lunar far side that\nseeks to deploy and operate an array of 128 dual-polarization, dipole antennas\nover a…
View article: Lost Horizon: Quantifying the Effect of Local Topography on Global 21 cm Cosmology Data Analysis
Lost Horizon: Quantifying the Effect of Local Topography on Global 21 cm Cosmology Data Analysis Open
We present an investigation of the horizon and its effect on global 21 cm observations and analysis. We find that the horizon cannot be ignored when modeling low-frequency observations. Even if the sky and antenna beam are known exactly, f…
View article: Global 21 cm Signal Extraction from Foreground and Instrumental Effects. IV. Accounting for Realistic Instrument Uncertainties and Their Overlap with Foreground and Signal Models
Global 21 cm Signal Extraction from Foreground and Instrumental Effects. IV. Accounting for Realistic Instrument Uncertainties and Their Overlap with Foreground and Signal Models Open
All 21 cm signal experiments rely on electronic receivers that affect the data via both multiplicative and additive biases through the receiver’s gain and noise temperature. While experiments attempt to remove these biases, the residuals o…
View article: Peering into the dark (ages) with low-frequency space interferometers
Peering into the dark (ages) with low-frequency space interferometers Open
The Dark Ages and Cosmic Dawn are largely unexplored windows on the infant Universe (z ~ 200–10). Observations of the redshifted 21-cm line of neutral hydrogen can provide valuable new insight into fundamental physics and astrophysics duri…
View article: An X-ray and radio study of the Hubble Frontier Field cluster Abell S1063
An X-ray and radio study of the Hubble Frontier Field cluster Abell S1063 Open
We present results from Chandra X-ray observations and 325 MHz Giant Metrewave Radio Telescope (GMRT) observations of the massive and X-ray luminous cluster of galaxies Abell S1063. We report the detection of large-scale ‘excess brightness…