Publications (28)
Rapid Mass Parameter Estimation of Binary Black Hole Coalescences Using Deep Learning
Alistair McLeod, Daniel Jacobs, Chayan Chatterjee +2
Deep learning can be used to drastically decrease the processing time of parameter estimation for coalescing binaries of compact objects including black holes and neutron stars det…
Starbug fibre positioning robots: performance and reliability enhancements
David M. Brown, Scott Case, James Gilbert +9
Starbugs are miniature piezoelectric walking robots that can be operated in parallel to position many payloads like optical fibers across a telescopes focal plane. They consist of…
Mapping Cosmic Dawn and Reionization: Challenges and Synergies
Marcelo A. Alvarez, Anastasia Fialkov, Paul La Plante +47
Cosmic dawn and the Epoch of Reionization (EoR) are among the least explored observational eras in cosmology: a time at which the first galaxies and supermassive black holes formed…
Astro2020 Science White Paper: First Stars and Black Holes at Cosmic Dawn with Redshifted 21-cm Observations
Jordan Mirocha, Daniel Jacobs, Josh Dillon +39
The "cosmic dawn" refers to the period of the Universe's history when stars and black holes first formed and began heating and ionizing hydrogen in the intergalactic medium (IGM).…
Line-Intensity Mapping: 2017 Status Report
Ely D. Kovetz, Marco P. Viero, Adam Lidz +45
Following the first two annual intensity mapping workshops at Stanford in March 2016 and Johns Hopkins in June 2017, we report on the recent advances in theory, instrumentation and…
Cosmology with the Highly Redshifted 21cm Line
Adrian Liu, James Aguirre, Yacine Ali-Haimoud +47
In addition to being a probe of Cosmic Dawn and Epoch of Reionization astrophysics, the 21cm line at is also a powerful way to constrain cosmology. Its power derives from sev…
The Star-Planet Activity Research CubeSat (SPARCS): A Mission to Understand the Impact of Stars in Exoplanets
David R. Ardila, Evgenya Shkolnik, Paul Scowen +14
The Star-Planet Activity Research CubeSat (SPARCS) is a NASA-funded astrophysics mission, devoted to the study of the ultraviolet (UV) time-domain behavior in low-mass stars. Given…
Low-light phase retrieval with implicit generative priors
Raunak Manekar, Elisa Negrini, Minh Pham +4
Phase retrieval (PR) is fundamentally important in scientific imaging and is crucial for nanoscale techniques like coherent diffractive imaging (CDI). Low radiation dose imaging is…
The precision and accuracy of early Epoch of Reionization foreground models: comparing MWA and PAPER 32-antenna source catalogs
Daniel Jacobs, Judd Bowman, James Aguirre
As observations of the Epoch of Reionization (EoR) in redshifted 21cm emission begin, we asses the accuracy of the early catalog results from the Precision Array for Probing the Ep…
Understanding the Diversity of 21 cm Cosmology Analyses
Miguel F. Morales, Adam Beardsley, Jonathan Pober +4
21 cm power spectrum observations have the potential to revolutionize our understanding of the Epoch of Reionization and Dark Energy, but require extraordinarily precise data analy…
Research and Development for HI Intensity Mapping
Zeeshan Ahmed, David Alonso, Mustafa A. Amin +51
Development of the hardware, data analysis, and simulation techniques for large compact radio arrays dedicated to mapping the 21 cm line of neutral hydrogen gas has proven to be mo…
New Limits on Polarized Power Spectra at 126 and 164 MHz: Relevance to Epoch of Reionization Measurements
David Moore, James E. Aguirre, Saul Kohn +15
Polarized foreground emission is a potential contaminant of attempts to measure the fluctuation power spectrum of highly redshifted 21 cm HI emission from the epoch of reionization…
The Star-Planet Activity Research CubeSat (SPARCS): Determining Inputs to Planetary Habitability
David R. Ardila, Evgenya Shkolnik, Paul Scowen +19
Seventy-five billion low-mass stars in our galaxy host at least one small planet in their habitable zone (HZ). The stellar ultraviolet (UV) radiation received by the planets is str…
Onboard Dynamic Image Exposure Control for the Star-Planet Activity Research CubeSat (SPARCS)
Tahina Ramiaramanantsoa, Judd D. Bowman, Evgenya L. Shkolnik +19
The Star-Planet Activity Research CubeSat (SPARCS) is a 6U CubeSat under development to monitor the flaring and chromospheric activity of M dwarfs at near-ultraviolet (NUV) and far…
Development of a High Throughput Cloud-Based Data Pipeline for 21 cm Cosmology
Ruby Byrne, Daniel Jacobs
We present a case study of a cloud-based computational workflow for processing large astronomical data sets from the Murchison Widefield Array (MWA) cosmology experiment. Cloud com…
The Astropy Problem
Demitri Muna, Michael Alexander, Alice Allen +151
The Astropy Project (http://astropy.org) is, in its own words, "a community effort to develop a single core package for Astronomy in Python and foster interoperability between Pyth…
Improved 21 cm Epoch Of Reionization Power Spectrum Measurements with a Hybrid Foreground Subtraction and Avoidance Technique
Joshua Kerrigan, Jonathan Pober, Zaki Ali +16
Observations of the 21cm Epoch of Reionization (EoR) signal are dominated by Galactic and extragalactic foregrounds. The need for foreground removal has led to the development of t…
Path-Phase Information Complementarity for Interfering Particles through State-Discrimination
Noam Erez, Daniel Jacobs, Gershon Kurizki
We analyze the trade-off between the amounts of information obtainable on complementary properties of a qubit state by simultaneous measurements. We consider a "state discriminatio…
Time-Resolved Photometry of the High-Energy Radiation of M Dwarfs with the Star-Planet Activity Research CubeSat (SPARCS)
Tahina Ramiaramanantsoa, Judd D. Bowman, Evgenya L. Shkolnik +18
Know thy star, know thy planet,... especially in the ultraviolet (UV). Over the past decade, that motto has grown from mere wish to necessity in the M dwarf regime, given that the…
Operational path-phase complementarity in single-photon interferometry
Noam Erez, Daniel Jacobs, Gershon Kurizki
We examine two setups that reveal different operational implications of path-phase complementarity for single photons in a Mach-Zehnder interferometer (MZI). In both setups, the wh…
HERA Phase I Limits on the Cosmic 21-cm Signal: Constraints on Astrophysics and Cosmology During the Epoch of Reionization
The HERA Collaboration, Zara Abdurashidova, James E. Aguirre +81
Recently, the Hydrogen Epoch of Reionization Array (HERA) collaboration has produced the experiment's first upper limits on the power spectrum of 21-cm fluctuations at z~8 and 10.…
Operando spectro-ptychography reveals dynamical charge-storage and degradation pathways in redox-active electrodes
Xiao Zhao, Yuchen Cao, Evan Z Carlson +13
Electrochemical reactions at buried electrode-electrolyte interfaces govern how redox-active materials store and release energy. However, these reactions are difficult to visualize…
Astro2020 Science White Paper: Insights Into the Epoch of Reionization with the Highly-Redshifted 21-cm Line
Steven Furlanetto, Chris L. Carilli, Jordan Mirocha +47
The epoch of reionization, when photons from early galaxies ionized the intergalactic medium about a billion years after the Big Bang, is the last major phase transition in the Uni…
Astro 2020 Science White Paper: Fundamental Cosmology in the Dark Ages with 21-cm Line Fluctuations
Steven Furlanetto, Judd D. Bowman, Jordan Mirocha +43
The Dark Ages are the period between the last scattering of the cosmic microwave background and the appearance of the first luminous sources, spanning approximately 1100 < z < 30.…
Cosmic Dawn and Reionization: Astrophysics in the Final Frontier
Asantha Cooray, James Aguirre, Yacine Ali-Haimoud +71
The cosmic dawn and epoch of reionization mark the time period in the universe when stars, galaxies, and blackhole seeds first formed and the intergalactic medium changed from neut…
Building SPARCS, an Ultraviolet Science CubeSat for Exoplanet Habitability Studies, Technology Advancements, and Mission Training
Evgenya L. Shkolnik, David R. Ardila, Logan Jensen +17
The Star-Planet Activity Research CubeSat (SPARCS) is a NASA-funded 6U-CubeSat mission designed to monitor ultraviolet (UV) radiation from low-mass stars. These stars' relatively h…
Astro2020 Science White Paper: Synergies Between Galaxy Surveys and Reionization Measurements
Steven Furlanetto, Adam Beardsley, Chris L. Carilli +47
The early phases of galaxy formation constitute one of the most exciting frontiers in astrophysics. It is during this era that the first luminous sources reionize the intergalactic…
A Sensitivity and Array-Configuration Study for Measuring the Power Spectrum of 21cm Emission from Reionization
Aaron Parsons, Jonathan Pober, Matthew McQuinn +2
Telescopes aiming to measure 21cm emission from the Epoch of Reionization must toe a careful line, balancing the need for raw sensitivity against the stringent calibration requirem…