Search Results - "Villar, V. Ashley"
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Superluminous Supernovae in LSST: Rates, Detection Metrics, and Light-curve Modeling
Published in The Astrophysical journal (20-12-2018)“…We explore and demonstrate the capabilities of the upcoming Large Synoptic Survey Telescope (LSST) to study Type I superluminous supernovae (SLSNe). We fit the…”
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Theoretical Models of Optical Transients. I. A Broad Exploration of the Duration-Luminosity Phase Space
Published in The Astrophysical journal (01-11-2017)“…The duration-luminosity phase space (DLPS) of optical transients is used, mostly heuristically, to compare various classes of transient events, to explore the…”
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The Pre-explosion Mass Distribution of Hydrogen-poor Superluminous Supernova Progenitors and New Evidence for a Mass-Spin Correlation
Published in The Astrophysical journal (01-07-2020)“…Despite indications that superluminous supernovae (SLSNe) originate from massive progenitors, the lack of a uniformly analyzed statistical sample has so far…”
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The Luminous and Double-peaked Type Ic Supernova 2019stc: Evidence for Multiple Energy Sources
Published in The Astrophysical journal (01-06-2021)“…Abstract We present optical photometry and spectroscopy of SN 2019stc (=ZTF19acbonaa), an unusual Type Ic supernova (SN Ic) at a redshift of z = 0.117. SN…”
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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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SN 2016iet: The Pulsational or Pair Instability Explosion of a Low-metallicity Massive CO Core Embedded in a Dense Hydrogen-poor Circumstellar Medium
Published in The Astrophysical journal (20-08-2019)“…We present optical photometry and spectroscopy of SN 2016iet (=Gaia16bvd=PS17brq), an unprecedented Type I supernova (SN I) at z = 0.0676 with no obvious…”
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SBI++: Flexible, Ultra-fast Likelihood-free Inference Customized for Astronomical Applications
Published in Astrophysical journal. Letters (01-07-2023)“…Abstract Flagship near-future surveys targeting 10 8 –10 9 galaxies across cosmic time will soon reveal the processes of galaxy assembly in unprecedented…”
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Identifying Tidal Disruption Events with an Expansion of the FLEET Machine-learning Algorithm
Published in The Astrophysical journal (01-06-2023)“…Abstract We present an expansion of FLEET, a machine-learning algorithm optimized to select transients that are most likely tidal disruption events (TDEs)…”
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Superphot+: Real-time Fitting and Classification of Supernova Light Curves
Published in The Astrophysical journal (01-10-2024)“…Abstract Photometric classifications of supernova (SN) light curves have become necessary to utilize the full potential of large samples of observations…”
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The First Two Years of FLEET: An Active Search for Superluminous Supernovae
Published in The Astrophysical journal (01-06-2023)“…Abstract In 2019 November, we began operating Finding Luminous and Exotic Extragalactic Transients (FLEET), a machine-learning algorithm designed to…”
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Multiple Peaks and a Long Precursor in the Type IIn Supernova 2021qqp: An Energetic Explosion in a Complex Circumstellar Environment
Published in The Astrophysical journal (01-04-2024)“…Abstract We present optical photometry and spectroscopy of the Type IIn supernova (SN) 2021qqp. Its unusual light curve is marked by a long precursor for ≈300…”
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Latent Stochastic Differential Equations for Modeling Quasar Variability and Inferring Black Hole Properties
Published in The Astrophysical journal (01-04-2024)“…Abstract Quasars are bright and unobscured active galactic nuclei (AGN) thought to be powered by the accretion of matter around supermassive black holes at the…”
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The LIGO HET Response (LIGHETR) Project to Discover and Spectroscopically Follow Optical Transients Associated with Neutron Star Mergers
Published in The Astrophysical journal (01-09-2023)“…Abstract The LIGO HET Response (LIGHETR) project is an enterprise to follow up optical transients (OTs) discovered as gravitational-wave merger sources by the…”
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Detection and parameter estimation of gravitational waves from binary neutron-star mergers in real LIGO data using deep learning
Published in Physics letters. B (10-04-2021)“…One of the key challenges of real-time detection and parameter estimation of gravitational waves from compact binary mergers is the computational cost of…”
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FLEET: A Redshift-agnostic Machine Learning Pipeline to Rapidly Identify Hydrogen-poor Superluminous Supernovae
Published in The Astrophysical journal (01-11-2020)“…Over the past decade wide-field optical time-domain surveys have increased the discovery rate of transients to the point that 10% are being spectroscopically…”
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Photometrically Classified Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey: A Case Study for Science with Machine-learning-based Classification
Published in The Astrophysical journal (01-09-2022)“…Abstract With the upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), it is expected that only ∼0.1% of all transients will be…”
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“Super-kilonovae” from Massive Collapsars as Signatures of Black Hole Birth in the Pair-instability Mass Gap
Published in The Astrophysical journal (01-12-2022)“…Abstract The core collapse of rapidly rotating massive ∼ 10 M ⊙ stars (“collapsars”), and the resulting formation of hyperaccreting black holes, comprise a…”
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SuperRAENN: A Semisupervised Supernova Photometric Classification Pipeline Trained on Pan-STARRS1 Medium-Deep Survey Supernovae
Published in The Astrophysical journal (01-12-2020)“…Automated classification of supernovae (SNe) based on optical photometric light-curve information is essential in the upcoming era of wide-field time domain…”
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Photometric Classification of 2315 Pan-STARRS1 Supernovae with Superphot
Published in The Astrophysical journal (01-12-2020)“…The classification of supernovae (SNe) and its impact on our understanding of explosion physics and progenitors have traditionally been based on the presence…”
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Searching for Anomalies in the ZTF Catalog of Periodic Variable Stars
Published in The Astrophysical journal (01-06-2022)“…Abstract Periodic variables illuminate the physical processes of stars throughout their lifetime. Wide-field surveys continue to increase our discovery rates…”
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