A5065278818- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Cardiovascular Disease and Adiposity
- Astronomy and Astrophysical Research
- Mitochondrial Function and Pathology
- Stellar, planetary, and galactic studies
- Particle Detector Development and Performance
California Institute of Technology
2023-2024
Infrared Processing and Analysis Center
2023-2024
Campbell Collaboration
2022-2023
Swinburne University of Technology
2022
We present the first results of a comprehensive supernova (SN) radiative-transfer (RT) code-comparison initiative (StaNdaRT), where emission from same set standardized test models is simulated by currently-used RT codes. A total ten codes have been run on four benchmark ejecta Type Ia supernovae. consider two sub-Chandrasekhar-mass ($M_\mathrm{tot} = 1.0$ M$_\odot$) toy with analytic density and composition profiles Chandrasekhar-mass delayed-detonation that are outcomes hydrodynamical...
With the advent of high cadence, all-sky automated surveys, supernovae (SNe) are now discovered closer than ever to their dates explosion. However, young pre-maximum light follow-up spectra Type Ic (SNe Ic), probably arising from most stripped massive stars, remain rare despite importance. In this paper we present a set 49 optical observed with Las Cumbres Observatory through Global Supernova Project for 6 SNe Ic, including total 17 spectra, which 8 more week before V-band maximum light....
Abstract Type Ia supernovae (SNe) remain poorly understood despite decades of investigation. Massive computationally intensive hydrodynamic simulations have been developed and run to model an ever-growing number proposed progenitor channels. Further complicating the matter, a large subtypes SNe identified in recent decades. Due massive computational load required, inference internal structure ejecta directly from observations using has previously intractable. However, deep-learning emulators...
Abstract Few published ultraviolet (UV) spectra exist for stripped-envelope supernovae and none to date broad-lined Type Ic (SNe Ic-bl). These objects have extremely high ejecta velocities are the only supernova type directly linked gamma-ray bursts (GRBs). Here we present two epochs of HST/STIS SN Ic-bl 2014ad, first UV this class. We supplement with 26 new ground-based optical spectra, augmenting a rich spectral time series. The do not show strong features consistent broadened versions...
Type Ia supernovae remain poorly understood despite decades of investigation. Massive computationally intensive hydrodynamic simulations have been developed and run to model an ever-growing number proposed progenitor channels. Further complicating the matter, a large sub-types identified in recent decades. Due massive computational load required, inference internal structure ejecta directly from observations using has previously intractable. However, deep-learning emulators for radiation...
Abstract Type Iax supernovae (SNe Iax) are the largest known class of peculiar white dwarf SNe, distinct from normal Ia Ia). The unique properties SNe Iax, especially their strong photospheric lines out to extremely late times, allow us model optical spectra and derive physical parameters long-lasting photosphere. We present an extensive spectral timeseries, including 21 new spectra, SN 2014dt +11 +562 days after maximum light. able reproduce entire timeseries with a self-consistent, nearly...
Type Iax supernovae (SN Iax) are the largest known class of peculiar white dwarf supernovae, distinct from normal Ia Ia). The unique properties SN Iax, especially their strong photospheric lines out to extremely late times, allow us model optical spectra and derive physical parameters for long-lasting photosphere. We present an extensive spectral timeseries, including 21 new spectra, 2014dt +11 +562 days after maximum light. able reproduce entire timeseries with a self-consistent, nearly...
With the advent of high cadence, all-sky automated surveys, supernovae (SNe) are now discovered closer than ever to their dates explosion. However, young pre-maximum light follow-up spectra Type Ic (SNe Ic), probably arising from most stripped massive stars, remain rare despite importance. In this paper we present a set 49 optical observed with Las Cumbres Observatory through Global Supernova Project for 6 SNe Ic, including total 17 spectra, which 8 more week before V-band maximum light....