| Title: |
Photometry and Spectroscopy of SN 2024pxl: A Luminosity Link among Type Iax Supernovae |
| Authors: |
Singh, M; Kwok, LA; Jha, SW; Dastidar, R; Larison, C; Filippenko, AV; Andrews, JE; Andrews, M; Anupama, GC; Arunachalam, P; Auchettl, K; Bánhidi, D; Barna, B; Bostroem, KA; Brink, TG; Cartier, R; Chen, P; Christy, CT; Coulter, DA; Covarrubias, S; Davis, KW; Dickinson, CB; Dong, Y; Farah, J; Srivastav, S |
| Publisher Information: |
American Astronomical Society |
| Publication Year: |
2026 |
| Collection: |
Oxford University Research Archive (ORA) |
| Description: |
We present extensive ultraviolet to optical photometric and optical to near-infrared (NIR) spectroscopic follow-up observations of the nearby intermediate-luminosity (MV = −16.81 ± 0.19 mag) Type Iax supernovae (SNe Iax) 2024pxl in NGC 6384. SN 2024pxl exhibits a faster light curve than the high-luminosity members of this class, and slower than low-luminosity events. The observationally well-constrained rise time of ∼11 days and an estimated synthesized 56Ni mass of 0.03 M⊙, based on analytical modeling of the integrated spectral energy distribution light curve, are consistent with models of the weak deflagration of a carbon-oxygen white dwarf. Our optical spectral sequence of SN 2024pxl shows weak Si ii lines and spectral evolution similar to other high-luminosity SNe Iax, but also a prominent early-time C ii line, like lower-luminosity SNe Iax. The late-time optical spectrum of SN 2024pxl closely matches that of SN 2014dt, and its NIR spectral evolution aligns with that of other well-studied, high-luminosity SNe Iax. The spectral-line expansion velocities of SN 2024pxl are at the lower end of the SNe Iax velocity distribution, and the velocity distribution of iron-group elements compared to intermediate-mass elements suggests that the ejecta are mixed on large scales, as expected in pure deflagration models. SN 2024pxl exhibits characteristics intermediate between those of high-luminosity and low-luminosity SNe Iax, further establishing a link across this diverse class. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.3847/1538-4357/ae4318 |
| Availability: |
https://doi.org/10.3847/1538-4357/ae4318; https://ora.ox.ac.uk/objects/uuid:aa88913c-e161-4dca-b759-3fa8ecd1992f |
| Rights: |
info:eu-repo/semantics/openAccess ; CC Attribution (CC BY) |
| Accession Number: |
edsbas.D23D7D8E |
| Database: |
BASE |