A5056472465- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Cultural Heritage Materials Analysis
- X-ray Spectroscopy and Fluorescence Analysis
- Mechanics and Biomechanics Studies
- Prenatal Substance Exposure Effects
- CCD and CMOS Imaging Sensors
- Big Data Technologies and Applications
- Space Science and Extraterrestrial Life
- Astrophysics and Cosmic Phenomena
- Cannabis and Cannabinoid Research
- Geophysics and Gravity Measurements
- History and Developments in Astronomy
- Solar and Space Plasma Dynamics
- Conservation Techniques and Studies
- Veterinary Practice and Education Studies
- High-pressure geophysics and materials
- Sociopolitical Dynamics in Russia
University of Notre Dame
2018-2023
Notre Dame of Dadiangas University
2020
Harvard University
2001
Appleton Public Library
1916
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 We present a recalibration of the photometric systems in Pantheon+ sample Type Ia supernovae (SNe Ia) including those SH0ES distance-ladder measurement H 0 . utilize large and uniform sky coverage public Pan-STARRS stellar photometry catalog to cross calibrate against tertiary standards released by individual SN surveys. The most significant updates over “SuperCal” calibration used for previous Pantheon analyses are: (1) expansion number (now 25) filters 105), (2) solving all filter...
Abstract We compare infrared surface brightness fluctuation (IR SBF) distances measured in galaxies that have hosted type Ia supernovae (SNe Ia) to estimated from SNe light-curve fits. show the properties of found IR SBF hosts are very different those exploding Cepheid calibrators, therefore this is a direct test systematic uncertainties on estimation Hubble constant ( H 0 ) using SNe. The results Jensen et al. provide large and uniformly sample which we directly with 25 SN host galaxies....
Abstract We measured high-quality surface brightness fluctuation (SBF) distances for a sample of 63 massive early-type galaxies using the WFC3/IR camera on Hubble Space Telescope. The median uncertainty SBF distance measurements is 0.085 mag, or 3.9% in distance. Achieving this precision at 50–100 Mpc required significant improvements to calibration and data analysis procedures data. Forty-two are from MASSIVE Galaxy Survey, complete within ∼100 Mpc; these will be used improve estimates...
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...
The unique binary AR Scorpii consists of an asynchronously rotating, magnetized white dwarf (WD) that interacts with its red-dwarf companion to produce a large-amplitude, highly coherent pulsation every 1.97 minutes. Over the course two years, we obtained thirty-nine hours time-resolved, optical photometry Sco at typical cadence 5 seconds study this pulsation. We find it undergoes significant changes across orbital period and amplitude, phase, waveform all vary as function phase. show these...
During 2000 February 9-10, the Large Angle Spectrometric Coronagraph and Ultraviolet Coronal Spectrometer (UVCS) instruments aboard Solar Heliospheric Observatory observed comet C/2000 C6, a member of Kreutz family sungrazing comets. A tail nearly 0.5 R☉ in length was detected Lyα emission. UVCS able to observe at four heights as it approached Sun. jump brightness between 5.71 4.56 suggests that nucleus fragmented, exposing more area solar illumination increasing outgassing rate. We...
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,...
The physical properties of faint stellar and substellar objects often rely on indirect, model-dependent estimates. For example, the masses brown dwarfs are usually inferred using evolutionary models, which age dependent have yet to be properly calibrated. With goal identifying new benchmark test low-mass we carried out a comprehensive adaptive optics survey as part TaRgetting bENchmark-objects with Doppler Spectroscopy high-contrast imaging program. Using legacy radial velocity measurements...
Constraining substellar evolutionary models (SSEMs) is particularly difficult due to a degeneracy between the mass, age, and luminosity of brown dwarf. In cases where dwarf found as directly imaged companion star, in HD 4747 19467, are determined independently, making them ideal objects use benchmark SSEMs. Using Center for High Angular Resolution Astronomy Array, we measured angular diameters calculated radii host stars A 19467 A. After fitting their parameters Dartmouth Stellar Evolution...
We present here a re-calibration of the photometric systems used in Pantheon+ sample Type Ia supernovae (SNe Ia) including those for SH0ES distance-ladder measurement H$_0$. utilize large and uniform sky coverage public Pan-STARRS stellar photometry catalog to cross-calibrate against tertiary standards released by individual SN surveys. The most significant updates over `SuperCal' cross-calibration previous Pantheon analyses are: 1) expansion number (now 25) filters 105), 2) solving all...
Abstract We analyze time-series spectroscopy of the white dwarf merger candidate J005311 and confirm unique nature its optical spectrum. detect an additional broad emission feature peaking at 343 nm that was predicted in Gvaramadze et al. (2019) models. Comparing ten spectra taken with Large Binocular Telescope, we find significant variability profile strong O vi 381.1/383.4 feature. This appears to be caused by rapidly shifting subpeaks generated clumpiness stellar wind J005311. line is...
We compare infrared surface brightness fluctuation (IR SBF) distances measured in galaxies that have hosted type Ia supernovae (SNIa) to estimated from SNIa light curve fits. show the properties of found IR SBF hosts are very different those exploding Cepheid calibrators, therefore, this is a direct test systematic uncertainties on estimation Hubble constant (Ho) using supernovae. The results Jensen et al. (2021; arXiv:2105.08299) provide large and uniformly sample which we directly with 25...
Abstract A new field method employing a portable x-ray fluorescence (XRF) instrument with high resolution (cooled) semiconductor detector for the analysis of lead in paint and soil has been developed. This many advantages laboratory methods terms excellent precision, accuracy, stability, yet at same time is battery operated so that samples can be analyzed immediately on site. The results this XRF are compared atomic absorption samples.
Dear Students,My name is Charlotte and I am currently a Student Veterinary Nurse student council member on the BVNA council. My time has been focused to try find ways help a...
We analyze time-series spectroscopy of the white dwarf merger candidate J005311 and confirm unique nature its optical spectrum. detect an additional broad emission feature peaking at 343nm that was predicted in Gvaramadze et al. (2019; arXiv:1904.00012) models. Comparing ten spectra taken with Large Binocular Telescope (LBT), we find significant variability profile strong OVI 381.1/383.4nm feature. This appears to be caused by rapidly shifting subpeaks generated clumpiness stellar wind...