Search Results - "Coulter, David A."
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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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Measuring the Hubble constant with a sample of kilonovae
Published in Nature communications (17-08-2020)“…Kilonovae produced by the coalescence of compact binaries with at least one neutron star are promising standard sirens for an independent measurement of the…”
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SN 2023ixf in Messier 101: A Variable Red Supergiant as the Progenitor Candidate to a Type II Supernova
Published in Astrophysical journal. Letters (01-07-2023)“…Abstract We present preexplosion optical and infrared (IR) imaging at the site of the type II supernova (SN II) 2023ixf in Messier 101 at 6.9 Mpc. We…”
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Optimizing multitelescope observations of gravitational-wave counterparts
Published in Monthly notices of the Royal Astronomical Society (11-11-2019)“…ABSTRACT The ever-increasing sensitivity of the network of gravitational-wave detectors has resulted in the accelerated rate of detections from compact binary…”
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Updated Photometry of the Yellow Supergiant Progenitor and Late-time Observations of the Type IIb Supernova SN 2016gkg
Published in The Astrophysical journal (01-09-2022)“…Abstract We present Hubble Space Telescope (HST) observations of the Type IIb supernova (SN) SN 2016gkg at 652, 1698, and 1795 days from explosion with the…”
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A Carbon/Oxygen-dominated Atmosphere Days after Explosion for the “Super-Chandrasekhar” Type Ia SN 2020esm
Published in The Astrophysical journal (01-03-2022)“…Abstract Seeing pristine material from the donor star in a type Ia supernova (SN Ia) explosion can reveal the nature of the binary system. In this paper, we…”
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Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf
Published in The Astrophysical journal (01-06-2020)“…We present observations and modeling of SN 2016hnk, a Ca-rich supernova (SN) that is consistent with being the result of a He-shell double-detonation explosion…”
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Relative Intrinsic Scatter in Hierarchical Type Ia Supernova Sibling Analyses: Application to SNe 2021hpr, 1997bq, and 2008fv in NGC 3147
Published in The Astrophysical journal (01-10-2023)“…Abstract We present Young Supernova Experiment grizy photometry of SN 2021hpr, the third Type Ia supernova sibling to explode in the Cepheid calibrator galaxy,…”
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Flight of the Bumblebee: the Early Excess Flux of Type Ia Supernova 2023bee Revealed by TESS, Swift, and Young Supernova Experiment Observations
Published in The Astrophysical journal (01-02-2024)“…Abstract We present high-cadence ultraviolet through near-infrared observations of the Type Ia supernova (SN Ia) 2023bee at D = 32 ± 3 Mpc, finding excess flux…”
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Stellar Tidal Disruption Events with Abundances and Realistic Structures (STARS): Library of Fallback Rates
Published in The Astrophysical journal (01-12-2020)“…We present the STARS library, a grid of tidal disruption event (TDE) simulations interpolated to provide the mass fallback rate (dM/dt) to the black hole for a…”
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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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Updated parameter estimates for GW190425 using astrophysical arguments and implications for the electromagnetic counterpart
Published in Monthly notices of the Royal Astronomical Society (01-05-2020)“…ABSTRACT The progenitor system of the compact binary merger GW190425 had a total mass of $3.4^{+0.3}_{-0.1}$ M⊙ (90th-percentile confidence region) as measured…”
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Connecting the progenitors, pre-explosion variability and giant outbursts of luminous blue variables with Gaia16cfr
Published in Monthly notices of the Royal Astronomical Society (01-02-2018)“…AbstractWe present multi-epoch, multicolour pre-outburst photometry and post-outburst light curves and spectra of the luminous blue variable (LBV) outburst…”
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Double-peaked Balmer Emission Indicating Prompt Accretion Disk Formation in an X-Ray Faint Tidal Disruption Event
Published in The Astrophysical journal (01-11-2020)“…We present the multiwavelength analysis of the tidal disruption event (TDE) AT 2018hyz (ASASSN-18zj). From follow-up optical spectroscopy, we detect the first…”
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15
The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times
Published in The Astrophysical journal (01-08-2020)“…We present nearly 500 days of observations of the tidal disruption event (TDE) ASASSN-18pg, spanning from 54 days before peak light to 441 days after peak…”
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Type II-P supernova progenitor star initial masses and SN 2020jfo: direct detection, light-curve properties, nebular spectroscopy, and local environment
Published in Monthly notices of the Royal Astronomical Society (12-07-2023)“…ABSTRACT We present optical, ultraviolet, and infrared data of the type II supernova (SN II) 2020jfo at 14.5 Mpc. This wealth of multiwavelength data allows us…”
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A low-mass helium star progenitor model for the Type Ibn SN 2020nxt
Published in Monthly notices of the Royal Astronomical Society (06-05-2024)“…ABSTRACT A growing number of supernovae (SNe) are now known to exhibit evidence for significant interaction with a dense, pre-existing, circumstellar medium…”
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SN 2019muj – a well-observed Type Iax supernova that bridges the luminosity gap of the class
Published in Monthly notices of the Royal Astronomical Society (01-02-2021)“…ABSTRACT We present early-time (t < +50 d) observations of SN 2019muj (=ASASSN-19tr), one of the best-observed members of the peculiar SN Iax class…”
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Standardizing kilonovae and their use as standard candles to measure the Hubble constant
Published in Physical review research (2020)“…The detection of GW170817 is revolutionizing many areas of astrophysics with the joint observation of gravitational waves and electromagnetic emissions. These…”
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SN 2022oqm: A Bright and Multipeaked Calcium-rich Transient
Published in The Astrophysical journal (01-09-2024)“…Abstract We present the photometric and spectroscopic evolution of SN 2022oqm, a nearby multipeaked hydrogen- and helium-weak calcium-rich transient (CaRT). SN…”
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