Search Results - "Scolnic, Dan"
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A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT
Published in The Astrophysical journal (20-07-2016)“…ABSTRACT We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant from…”
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The Pantheon+ Analysis: SuperCal-fragilistic Cross Calibration, Retrained SALT2 Light-curve Model, and Calibration Systematic Uncertainty
Published in The Astrophysical journal (01-10-2022)“…Abstract We present a recalibration of the photometric systems in the Pantheon+ sample of Type Ia supernovae (SNe Ia) including those in the SH0ES…”
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JWST Observations Reject Unrecognized Crowding of Cepheid Photometry as an Explanation for the Hubble Tension at 8σ Confidence
Published in Astrophysical journal. Letters (01-02-2024)“…Abstract We present high-definition observations with the James Webb Space Telescope (JWST) of >1000 Cepheids in a geometric anchor of the distance ladder, NGC…”
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Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST
Published in Astrophysical journal. Letters (01-10-2023)“…Abstract High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric…”
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Designing an Optimal LSST Deep Drilling Program for Cosmology with Type Ia Supernovae
Published in The Astrophysical journal. Supplement series (01-01-2023)“…Abstract The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) is forecast to collect a large sample of Type Ia supernovae (SNe Ia) expected…”
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Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics beyond ΛCDM
Published in The Astrophysical journal (01-05-2019)“…We present an improved determination of the Hubble constant from Hubble Space Telescope (HST) observations of 70 long-period Cepheids in the Large Magellanic…”
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The Local Perspective on the Hubble Tension: Local Structure Does Not Impact Measurement of the Hubble Constant
Published in The Astrophysical journal (20-04-2019)“…We use the largest sample to date of spectroscopic supernova (SN) Ia distances and redshifts to look for evidence in the Hubble diagram of large-scale outflows…”
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Assessment of Systematic Uncertainties in the Cosmological Analysis of the SDSS Supernovae Photometric Sample
Published in The Astrophysical journal (20-02-2020)“…Improvements to the precision of measurements of cosmological parameters with Type Ia supernovae (SNe Ia) are expected to come from large photometrically…”
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Improved Treatment of Host-galaxy Correlations in Cosmological Analyses with Type Ia Supernovae
Published in The Astrophysical journal (01-05-2021)“…Abstract Improving the use of Type Ia supernovae (SNe Ia) as standard candles requires a better approach to incorporate the relationship between SNe Ia and the…”
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Prospects for Resolving the Hubble Constant Tension with Standard Sirens
Published in Physical review letters (15-02-2019)“…The Hubble constant (H_{0}) estimated from the local Cepheid-supernova distance ladder is in 3-σ tension with the value extrapolated from cosmic microwave…”
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Cluster Cepheids with High Precision Gaia Parallaxes, Low Zero-point Uncertainties, and Hubble Space Telescope Photometry
Published in The Astrophysical journal (01-10-2022)“…Abstract We present Hubble Space Telescope (HST) photometry of 17 Cepheids in open clusters and their cluster mean parallaxes from Gaia EDR3. These parallaxes…”
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The Pantheon+ Analysis: Cosmological Constraints
Published in The Astrophysical journal (01-10-2022)“…Abstract We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves of 1550 distinct Type Ia supernovae (SNe Ia)…”
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The Pantheon+ Analysis: The Full Data Set and Light-curve Release
Published in The Astrophysical journal (01-10-2022)“…Abstract Here we present 1701 light curves of 1550 unique, spectroscopically confirmed Type Ia supernovae (SNe Ia) that will be used to infer cosmological…”
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Cosmology with the Roman Space Telescope - Multiprobe Strategies
Published in Monthly notices of the Royal Astronomical Society (01-10-2021)“…We simulate the scientific performance of the Nancy Grace Roman Space Telescope High Latitude Survey (HLS) on dark energy and modified gravity. The 1.6-yr HLS…”
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Optimization of the Observing Cadence for the Rubin Observatory Legacy Survey of Space and Time: A Pioneering Process of Community-focused Experimental Design
Published in The Astrophysical journal. Supplement series (01-01-2022)“…Abstract Vera C. Rubin Observatory is a ground-based astronomical facility under construction, a joint project of the National Science Foundation and the U.S…”
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Hawaií Supernova Flows: A peculiar velocity survey using over a Thousand Supernovae in the near-infrared
Published in Monthly notices of the Royal Astronomical Society (07-11-2024)“…Abstract We introduce the Hawai‘i Supernova Flows project and present summary statistics of the first 1,217 astronomical transients observed, 668 of which are…”
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The Impact of Observing Strategy on Cosmological Constraints with LSST
Published in The Astrophysical journal. Supplement series (01-04-2022)“…Abstract The generation-defining Vera C. Rubin Observatory will make state-of-the-art measurements of both the static and transient universe through its Legacy…”
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Absolute Calibration of Cepheid Period–Luminosity Relations in NGC 4258
Published in The Astrophysical journal (01-11-2022)“…Abstract Owing to its accurate distance measured from water-maser motions, NGC 4258 is one of the most important anchors for calibrating the Cepheid…”
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Enabling kilonova science with Nancy Grace Roman Space Telescope
Published in Astroparticle physics (01-02-2024)“…Binary neutron star mergers and neutron star–black hole mergers are multi-messenger sources that can be detected in gravitational waves and in electromagnetic…”
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A synthetic Roman Space Telescope High-Latitude Time-Domain Survey: supernovae in the deep field
Published in Monthly notices of the Royal Astronomical Society (08-06-2023)“…ABSTRACT NASA will launch the Nancy Grace Roman Space Telescope (hereafter Roman) in the second half of this decade, which will allow for a generation-defining…”
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