A5087801812- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Astrophysics and Star Formation Studies
- Galaxies: Formation, Evolution, Phenomena
- History and Developments in Astronomy
- Space Science and Extraterrestrial Life
- Big Data Technologies and Applications
- Italy: Economic History and Contemporary Issues
Duke University
2022-2024
Center for Astrophysics Harvard & Smithsonian
2023
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 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...
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...
Measurements of Type Ia Supernovae (SNe Ia) in the near-infrared (NIR) have been used both as an alternate path to cosmology compared optical measurements and a method constraining key systematics for larger studies. With DEHVILS sample, largest published NIR sample with consistent coverage maximum light across three bands ($Y$, $J$, $H$), we check systematics: (i) reduction Hubble residual scatter optical, (ii) measurement "mass step" or lack thereof its implications, (iii) ability...
Abstract The study of supernova (SN) siblings, supernovae with the same host galaxy, is an important avenue for understanding and measuring properties Type Ia SN light curves (LCs). Thus far, sibling analyses have mainly focused on optical LC data. Considering that LCs in near-infrared (NIR) are expected to be better standard candles than those optical, we carry out first analysis compiling siblings only NIR We perform extensive literature search all find six sets published photometry....
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 polluted white dwarf (WD) system SDSS J122859.93+104032.9 (SDSS J1228) shows variable emission features interpreted as originating from a solid core fragment held together against tidal forces by its own internal strength, orbiting within surrounding debris disk. Estimating the size of this body requires modeling accretion rate polluting material that is observed mixing into WD surface. That supplied via sublimation surface body. can be estimated simple function area and incident flux...
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...
Measurements of type Ia supernovae (SNe Ia) in the near-infrared (NIR) have been used both as an alternate path to cosmology compared optical measurements and a method constraining key systematics for larger studies. With DEHVILS sample, largest published NIR sample with consistent coverage maximum light across three bands ( Y, J , H ), we check systematics: (i) reduction Hubble residual scatter optical, (ii) measurement “mass step” or lack thereof its implications, (iii) ability distinguish...
The study of supernova siblings, supernovae with the same host galaxy, is an important avenue for understanding and measuring properties Type Ia Supernova (SN Ia) light curves (LCs). Thus far, sibling analyses have mainly focused on optical LC data. Considering that LCs in near-infrared (NIR) are expected to be better standard candles than those optical, we carry out first analysis compiling SN siblings only NIR We perform extensive literature search all find six sets published photometry....
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,...
The polluted white dwarf (WD) system SDSS J122859.93+104032.9 (SDSS J1228) shows variable emission features interpreted as originating from a solid core fragment held together against tidal forces by its own internal strength, orbiting within surrounding debris disk. Estimating the size of this body requires modeling accretion rate polluting material that is observed mixing into WD surface. That supplied via sublimation surface body. can be estimated simple function area and incident flux...