Explanipedia

Low frequency, 100–600 MHz, searches with axion cavity haloscopes Open

Sankha Subhra Chakrabarty, J. R. Gleason, Y. Han, A. T. Hipp, Miguel A. Solano , et al. · 2024

We investigate reentrant and dielectric loaded cavities for the purpose of extending the range of axion cavity haloscopes to lower masses, below the range where the Axion Dark Matter experiment (ADMX) has already searched. Reentrant and di…

Non-Virialized Axion Search Sensitive to Doppler Effects in the Milky Way Halo Open

Chelsea L. Bartram, T. Braine, R. Cervantes, N. Crisosto, N. Du , et al. · 2023

The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions between 680-790 MHz under the assumption that the dark matter is described by the isothermal halo model. However, the precise n…

Search for a Dark-Matter-Induced Cosmic Axion Background with ADMX Open

T. Nitta, T. Braine, N. Du, M. Guzzetti, C. Hanretty , et al. · 2023

We report the first result of a direct search for a cosmic axion background (CaB)-a relativistic background of axions that is not dark matter-performed with the axion haloscope, the Axion Dark Matter eXperiment (ADMX). Conventional halosco…

Dark matter axion search using a Josephson Traveling wave parametric amplifier Open

C. Bartram, T. Braine, R. Cervantes, N. Crisosto, N. Du , et al. · 2023

We describe the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in an axion dark matter search. The operation of the JTWPA for a period of about two weeks achieved sensitivity to axion-like particle dark mat…

The Fermilab Holometer: A program to measure Planck scale indeterminacy Open

A. Chou, Craig J. Hogan, E. Ramberg, Jason H. Steffen, Chris Stoughton , et al. · 2023

We propose an experiment at Fermilab to study a conjectured effect called "holographic noise" that may arise from new Planck scale physics: the measured positions of bodies may wander randomly from ideal geodesics of classical relativity, …

Search for a dark-matter induced Cosmic Axion Background with ADMX Open

T. Nitta, T Braine, N. Du, M. Guzzetti, C. Hanretty , et al. · 2023

We report the first result of a direct search for a Cosmic ${\it axion}$ Background (C$a$B) - a relativistic background of axions that is not dark matter - performed with the axion haloscope, the Axion Dark Matter eXperiment (ADMX). Conven…

Effect of anti-retroviral regimen on proximal tubular function in Zambian adolescents and young adults living with HIV Open

Aggrey Mweemba, Paul Kelly, Douglas C. Heimburger, Wilbroad Mutale, Selestine Nzala , et al. · 2023

We conducted a cross-sectional study involving 180 adolescents and young adults receiving antiretroviral theray for at least 12 months at the University Teaching Hospitals (UTHs) in Lusaka, Zambia. These were either on Tenofovir or Abacavi…

Building Physician-Scientist Skills in R Programming: A Short Workshop Report Open

Muktar H. Aliyu, Mahmoud U. Sani, Donna J. Ingles, Fatimah I. Tsiga-Ahmed, Baba Maiyaki Musa , et al. · 2022

Introduction: Statistical analysis programs require coding experience and a basic understanding of programming, skills which are not taught as part of medical school or residency curricula.Methods: We conducted a five-day course for early-…

Tuberculosis treatment intermittency in the continuation phase and mortality in HIV-positive persons receiving antiretroviral therapy Open

Brenda Crabtree‐Ramírez, Cathy A. Jenkins, Bryan E. Shepherd, Karu Jayathilake, Valdiléa G. Veloso , et al. · 2022

Axion Dark Matter Experiment: Detailed design and operations Open

Rakshya Khatiwada, D. Bowring, A. Chou, A. Sonnenschein, W. C. Wester , et al. · 2021

Axion dark matter experiment ultra-low noise haloscope technology has enabled the successful completion of two science runs (1A and 1B) that looked for dark matter axions in the 2.66–3.1 μeV mass range with Dine–Fischler–Srednicki–Zhitnisk…

OzDES reverberation mapping program: Lag recovery reliability for 6-yr C <span>iv</span> analysis Open

A Penton, U Malik, T. M. Davis, P. Martini, Zhefu Yu , et al. · 2021

We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customizable simulations that mimic the characteristics of each …

Dark Matter Axion Search Using a Josephson Traveling Wave Parametric Amplifier Open

C. Bartram, T. Braine, R. Cervantes, N. Crisosto, N. Du , et al. · 2021

We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above $\mathrm{10^{-13}}$ $\mathrm{GeV^{-1}}$ over the frequency range 4796.7--4799.5 MHz, corresponding to a narrow range of axion masses cent…

Prognostic model for nephrotoxicity among HIV-positive Zambian adults receiving tenofovir disoproxil fumarate-based antiretroviral therapy Open

W Freeman, Edward D. Siew, Wilbroad Mutale, Lloyd Mulenga, Aggrey Mweemba , et al. · 2021

Persons living with HIV (PLWH) receiving tenofovir disoproxil fumarate (TDF)-based antiretroviral therapy (ART) risk suffering TDF-associated nephrotoxicity (TDFAN). TDFAN can result in short- and long-term morbidity, including permanent l…

Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology Open

I. Sevilla-Noarbe, K. Bechtol, M. Carrasco Kind, A. Carnero Rosell, M. R. Becker , et al. · 2021

We describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmologic analyses, and provide usage notes aimed at the broad astrophysics community. Y3 GOLD …

Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies Open

Ethan O. Nadler, A. Drlica-Wagner, K. Bechtol, S. Mau, Risa H. Wechsler , et al. · 2021

We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the fundamental properties of dark matter (DM). This analysis fully incorporates inhomogeneities in the spatial distribution and detectability of MW satelli…

Axion dark matter experiment: Run 1B analysis details Open

C. Bartram, T. Braine, R. Cervantes, N. Crisosto, N. Du , et al. · 2021

Funder: \n U.S. Department of Energy\n http://dx.doi.org/10.13039/100000015

OzDES Reverberation Mapping Program: Lag recovery reliability for 6-year CIV analysis Open

A Penton, U Malik, T. M. Davis, Paul Martini, Zhefu Yu , et al. · 2021

We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customisable simulations that mimic the characteristics of each …

Dark Energy Survey year 3 results: point spread function modelling Open

Mike Jarvis, G. M. Bernstein, A. Amon, C. Davis, P.-F. Léget , et al. · 2020

We introduce a new software package for modelling the point spread function (PSF) of astronomical images, called piff (PSFs In the Full FOV), which we apply to the first three years (known as Y3) of the Dark Energy Survey (DES) data. We de…

Noise from undetected sources in Dark Energy Survey images Open

K. Eckert, G. M. Bernstein, A. Amara, A. Amon, A. Choi , et al. · 2020

For ground-based optical imaging with current CCD technology, the Poisson fluctuations in source and sky background photon arrivals dominate the noise budget and are readily estimated. Another component of noise, however, is the signal fro…

The mystery of photometric twins DES17X1boj and DES16E2bjy Open

M. Pursiainen, C. P. Gutiérrez, P. Wiseman, M. Childress, M. Smith , et al. · 2020

We present an analysis of DES17X1boj and DES16E2bjy, two peculiar transients discovered by the Dark Energy Survey (DES). They exhibit nearly identical double-peaked light curves that reach very different maximum luminosities (Mr = −15.4 an…

Blinding multiprobe cosmological experiments Open

J. Muir, G. M. Bernstein, Dragan Huterer, F. Elsner, E. Krause , et al. · 2020

The goal of blinding is to hide an experiment’s critical results – here the inferred cosmological parameters – until all decisions affecting its analysis have been finalized. This is especially important in the current era of precision cos…

Extended Search for the Invisible Axion with the Axion Dark Matter Experiment Open

T. Braine, R. Cervantes, N. Crisosto, N. Du, S. Kimes , et al. · 2020

This Letter reports on a cavity haloscope search for dark matter axions in the Galactic halo in the mass range 2.81-3.31 μeV. This search utilizes the combination of a low-noise Josephson parametric amplifier and a large-cavity haloscope t…

Dynamical Classification of Trans-Neptunian Objects Detected by the Dark Energy Survey Open

Tali Khain, Juliette Becker, Hsing Wen Lin, D. W. Gerdes, Fred C. Adams , et al. · 2020

The outer solar system contains a large number of small bodies (known as trans-Neptunian objects or TNOs) that exhibit diverse types of dynamical behavior. The classification of bodies in this distant region into dynamical classes—subpopul…

Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard-star Fields Open

Zhefu Yu, Paul Martini, T. M. Davis, R. A. Gruendl, J. K. Hoormann , et al. · 2020

Measurements of the physical properties of accretion disks in active galactic nuclei are important for better understanding the growth and evolution of supermassive black holes. We present the accretion disk sizes of 22 quasars from contin…

High Resolution Data Analysis: Plans and Prospects Open

S. Jois, Leanne Duffy, N. S. Sullivan, D. B. Tanner, W. C. Wester · 2020

Proper Motions of Stellar Streams Discovered in the Dark Energy Survey Open

Nora Shipp, Ting S. Li, Andrew B. Pace, Denis Erkal, A. Drlica-Wagner , et al. · 2019

We cross-match high-precision astrometric data from Gaia DR2 with accurate multiband photometry from the Dark Energy Survey (DES) DR1 to confidently measure proper motions for nine stellar streams in the DES footprint: Aliqa Uma, ATLAS, Ch…

Reprint of "Evidence for color dichotomy in the primordial Neptunian Trojan population" Open

Hsing Wen Lin, D. W. Gerdes, S. Hamilton, Fred C. Adams, G. M. Bernstein , et al. · 2019

Trans-Neptunian objects found in the first four years of the Dark Energy Survey Open

P. H. Bernardinelli, GM Bernstein, M. Šako, T Liu, WR Saunders , et al. · 2019

We present a catalog of 316 trans-Neptunian bodies detected by the Dark Energy Survey (DES). These objects include 245 discoveries by DES (139 not previously published) detected in $\approx 60,000$ exposures from the first four seasons of …

On the relative bias of void tracers in the Dark Energy Survey Open

G Pollina, Nico Hamaus, K. Paech, K. Dolag, J. Weller , et al. · 2019

Luminous tracers of large-scale structure are not entirely representative of the distribution of mass in our Universe. As they arise from the highest peaks in the matter density field, the spatial distribution of luminous objects is biased…

Dark Energy Surveyed Year 1 results: calibration of cluster mis-centring in the redMaPPer catalogues Open

Y. Zhang, T. Jeltema, D. L. Hollowood, S. Everett, Eduardo Rozo , et al. · 2019

The centre determination of a galaxy cluster from an optical cluster finding algorithm can be offset from theoretical prescriptions or N-body definitions of its host halo centre. These offsets impact the recovered cluster statistics, affec…

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