24 papers
Panchromatic JWST Observations and Models of the Dim Type Iax Supernova 2024vjm at 200 days
E Baron, J. M. DerKacy, C. Ashall +23
We report JWST spectra and photometry of the underluminous SN Iax 2024vjm obtained 202.8 restframe days post-explosion. The spectrum exhibits a rich set of forbidden lines from low…
Measuring the Arrow of Time: Identification, Estimation, and Inference for Directional Structure in Multivariate Time Series
Avishek Bhandari
Many questions across the sciences take the same form: several coupled series are observed together, and the analyst wants to know not merely that they move together but which one…
JWST Medium-Resolution Infrared Spectroscopy of SN 2022acko: Tracing Molecule Formation in the Nebular Phase
K. Medler, T. Mera, C. Ashall +28
The Type II supernova (SN II) SN 2022acko was the first to be spectroscopically observed by the James Webb Space Telescope (). Here, we analyze SN 2022acko's second…
SN 2019vxm: A luminous and long-lived Type IIn supernova with early flash-ionisation features
Y. -Z. Cai, A. Pastorello, T. J. Moriya +38
We present the photometric and spectroscopic analysis of the luminous and long-lasting Type IIn supernova (SN) 2019vxm. The SN reaches a peak V-band absolute magnitude of MV = -20.…
Probing the 3D Structures of Supernovae through IR Signatures of CO and SiO
T. Mera, P. Hoeflich, C. R. Burns +12
We present a new public-domain MOlecular Fitting Analysis Tool (MOFAT) designed to probe molecule-forming regions in supernovae (SNe) through analysis of molecular features in the…
The Search for Stable Nickel: Investigating the Origins of Type Ia Supernovae with Late-time NIR Spectroscopy from the Carnegie Supernova Project-II
Sahana Kumar, Eric Y. Hsiao, Christopher Ashall +20
Producing stable Ni in Type Ia supernovae (SNe Ia) requires sufficiently high density conditions that are not predicted for all origin scenarios, so examining the distributi…