A5026775589- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Laser-Matter Interactions and Applications
- Atomic and Molecular Physics
- Astro and Planetary Science
- Glioma Diagnosis and Treatment
- Galaxies: Formation, Evolution, Phenomena
- Laser-Plasma Interactions and Diagnostics
- Cancer Research and Treatments
- Biochemical and Molecular Research
- Public Procurement and Policy
- Planetary Science and Exploration
- Cancer, Hypoxia, and Metabolism
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- DNA Repair Mechanisms
- Mass Spectrometry Techniques and Applications
- Mitochondrial Function and Pathology
- X-ray Spectroscopy and Fluorescence Analysis
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Nuclear Physics and Applications
Duke University
2022-2024
University of Michigan–Ann Arbor
2001-2024
MIT Lincoln Laboratory
2020
Massachusetts Institute of Technology
2020
University of Notre Dame
2019
Argonne National Laboratory
2006-2011
Center for Strategic and International Studies
1994-2004
Bryn Mawr College
1995
Ames Research Center
1973-1994
University of Washington
1989
We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift $z=0.001$ to 2.26. This work features an increased sample size, span, and improved treatment systematic uncertainties comparison original Pantheon results a factor two improvement constraining power. For Flat$\Lambda$CDM model, we find $\Omega_M=0.334\pm0.018$ SNe alone. Flat$w_0$CDM measure $w_0=-0.90\pm0.14$ alone, H$_0=73.5\pm1.1$...
Here we present 1701 light curves of 1550 spectroscopically confirmed Type Ia supernovae (SNe Ia) that will be used to infer cosmological parameters as part the Pantheon+ SN analysis and SH0ES (Supernovae H0 for Equation State dark energy) distance-ladder analysis. This effort is one a series works perform an extensive review redshifts, peculiar velocities, photometric calibration, intrinsic-scatter models SNe Ia. The total number curves, which are compiled across 18 different surveys,...
Abstract The Dark Energy Spectroscopic Instrument (DESI) collaboration measured a tight relation between the Hubble constant ( H 0 ) and distance to Coma cluster using fundamental plane (FP) of deepest, most homogeneous sample early-type galaxies. To determine , we measure by several independent routes, each with its own geometric reference. We precise from 13 Type Ia supernovae (SNe Ia) in mean standardized brightness <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Abstract Separating the components of redshift due to expansion and peculiar motion in nearby universe ( z < 0.1) is critical for using Type Ia Supernovae (SNe Ia) measure Hubble constant H 0 ) equation-of-state parameter dark energy w ). Here, we study two dominant “motions” contributing velocities: large-scale, coherent-flow (CF) motions small-scale gravitationally associated galaxies deemed be a galaxy group. We use set 584 low- SNe from Pantheon+ sample, evaluate efficacy corrections...
Abstract We examine the redshifts of a comprehensive set published Type Ia supernovae, and provide combined, improved catalogue with updated redshifts. improve on original catalogues by using most up-to-date heliocentric redshift data available; ensuring all have uncertainty estimates; exact formulae to convert into Cosmic Microwave Background (CMB) frame; utilising an peculiar velocity model that calculates local motions in redshift-space more realistically accounts for external bulk flow...
A comprehensive study of three-photon electromagnetically-induced transparency (EIT) and absorption (EIA) on the rubidium cascade $5S_{1/2} \rightarrow 5P_{3/2}$ (laser wavelength 780~nm), $5P_{3/2} 5D_{5/2}$ (776~nm), $5D_{5/2}\rightarrow 28F_{7/2}$ (1260~nm) is performed. The 780-nm probe 776-nm dressing beams are counter-aligned through a Rb room-temperature vapor cell, 1260-nm coupler beam co- or with beam. Several cases EIT EIA, measured over range detunings beam, studied. observed...
The three rung distance ladder, which calibrates Type Ia supernovae through stellar distances linked to geometric measurements, provides the highest precision direct measurement of Hubble constant. In light tension, it is important test individual components ladder. For this purpose, we report a constant from 35 extragalactic Cepheid hosts measured by SH0ES team, using their and redshifts at cz < 3300 km /s , instead any, more distant supernovae, measure flow. are calibrated geometrically in...
ABSTRACT Future constraints of cosmological parameters from Type Ia supernovae (SNe Ia) will depend on the use photometric samples, those samples without spectroscopic measurements SNe Ia. There is a growing number analyses that show can be utilized for precision studies with minimal systematic uncertainties. To investigate this claim, we perform first analysis combines two separate SDSS and Pan-STARRS, including low-redshift anchor. We evaluate consistency these find they are consistent...
Abstract At the low-redshift end ( z < 0.05) of Hubble diagram with Type Ia Supernovae (SNe Ia), contribution to residual scatter from peculiar velocities (PVs) is similar size that due limitations standardization SN light curves. A way improve redshift measurement host galaxy utilize average group, effectively averaging over small-scale/intracluster PVs. One limiting factor fraction galaxies in groups, previously found be 30% using (relatively incomplete) magnitude-limited catalogs....
A large fraction of Type Ia supernova (SN Ia) observations over the next decade will be in near-infrared (NIR), at wavelengths beyond reach current standard light-curve model for SN cosmology, SALT3 ($\sim 2800$--8700$A$ central filter wavelength). To harness this new sample and reduce future standardization systematic uncertainties, we train NIR (SALT3-NIR) up to 2 $\mu$m with open-source model-training software SALTShaker, which can easily accommodate observations. Using simulated data...
We present a measurement of the Hubble constant ( H 0 ) using type Ia supernovae (SNe Ia) in near-infrared (NIR) from recently updated sample SNe nearby galaxies with distances measured via Cepheid period-luminosity relations by SH0ES project. collected public photometry up to 19 calibrator and 57 flow z > 0.01), directly their peak magnitudes J - -band Gaussian processes spline interpolation. Calibrator together Cepheid-based were used estimate average absolute magnitude each band, while...
Upcoming telescopes like the Vera Rubin Observatory (VRO) and Argus Array will image large fractions of sky multiple times per night yielding numerous Near Earth Object (NEO) discoveries. When asteroids are measured with short observation time windows, dominant uncertainty in orbit construction is due to distance NEO. One approach recover distances from topocentric parallax, which a technique that leverages rotation Earth, causing small but detectable sinusoidal additive signal Right...
Upcoming telescopes like the Vera Rubin Observatory (VRO) and Argus Array will image large fractions of sky multiple times per night yielding numerous Near Earth Object (NEO) discoveries. When asteroids are measured with short observation time windows, dominant uncertainty in orbit construction is due to distance NEO. One approach recover distances from topocentric parallax, which a technique that leverages rotation Earth, causing small but detectable sinusoidal additive signal Right...
We have developed a synchrotron-based, time-resolved x-ray microprobe to investigate optical strong-field processes at intermediate intensities (10(14) - 10(15) W/cm2). This quantum-state specific probe has enabled the direct observation of orbital alignment in residual ion produced by ionization krypton atoms via resonant, polarized absorption. found strong persist for period long compared spin-orbit coupling time scale (6.2 fs). The observed degree can be explained models that incorporate...
While the sample of optical Type Ia Supernova (SN Ia) light curves (LCs) usable for cosmological parameter measurements surpasses 2000, published, cosmologically viable near-infrared (NIR) SN LCs, which have been shown to be good "standard candles," is still $\lesssim$ 200. Here, we present high-quality NIR LCs 83 SNe ranging from $0.002 < z 0.09$ as a part Dark Energy, H$_0$, and peculiar Velocities using Infrared Light Supernovae (DEHVILS) survey. Observations are taken UKIRT's WFCAM,...
We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift $z=0.001$ to 2.26. This work features an increased sample size, span, and improved treatment systematic uncertainties comparison original Pantheon results a factor two improvement constraining power. For Flat$Λ$CDM model, we find $Ω_M=0.334\pm0.018$ SNe alone. Flat$w_0$CDM measure $w_0=-0.90\pm0.14$ alone, H$_0=73.5\pm1.1$ km...
We demonstrate a hard x-ray probe of laser-aligned small molecules. To align molecules with optical lasers, high intensities at nonresonant wavelengths are necessary. use 95ps pulses focused to 40μm from an 800nm Ti:sapphire laser peak intensity 1012W∕cm2 create ensemble aligned bromotrifluoromethane (CF3Br) Linearly polarized, 120ps pulses, 10μm, tuned the Br 1s→σ* preedge resonance 13.476keV, The demonstrated methodology has variety applications and can enable ultrafast imaging...
Abstract Background Diffuse midline gliomas (DMG), including diffuse intrinsic pontine (DIPGs), are a fatal form of brain cancer. These tumors often carry driver mutation on histone H3 converting lysine 27 to methionine (H3K27M). DMG-H3K27M characterized by altered metabolism and resistance standard care radiation (RT) but how the H3K27M mediates metabolic response consequent treatment is uncertain. Methods We performed metabolomics irradiated untreated isogenic DMG cell lines observed an...
Ultrafast laser excitation of an $\mathrm{InGaAs}/\mathrm{InAlAs}$ superlattice (SL) creates coherent folded acoustic phonons that subsequently leak into the bulk (InP) substrate. Upon transmission, become ``unfolded'' modes and acquire a wave vector much larger than light. We show time-resolved x-ray diffraction is sensitive to this large-wave in Comparison with dynamical simulations propagating strain supports our interpretation.
Abstract We are now in an era of molecular medicine, where specific DNA alterations can be used to identify patients who will respond drugs. However, there only a handful clinically predictive biomarkers oncology. Herein, we describe approach utilizing vitro and RNA sequencing drug response data create TreAtment Response Generalized Elastic-neT Signatures (TARGETS). trained TARGETS models using Elastic-Net regression the publicly available Genomics Drug Sensitivity Cancer (GDSC) database....
The $Euclid$ mission will provide first-of-its-kind coverage in the near-infrared over deep (three fields, $\sim$10-20 square degrees each) and wide ($\sim$10000 degrees) fields. While survey is not designed to discover transients, fields have repeated observations a two-week span, followed by gap of roughly six months. In this analysis, we explore how useful field be for measuring properties Type Ia supernovae (SNe Ia). Using simulations that include $Euclid$'s planned depth, area cadence...