DOAJ Open Access 2025

JWST and Ground-based Observations of the Type Iax Supernovae SN 2024pxl and SN 2024vjm: Evidence for Weak Deflagration Explosions

Lindsey A. Kwok Mridweeka Singh Saurabh W. Jha Stéphane Blondin Raya Dastidar +87 lainnya

Abstrak

We present panchromatic optical + near-infrared (NIR) + mid-infrared (MIR) observations of the intermediate-luminosity Type Iax supernova (SN Iax) 2024pxl and the extremely low-luminosity SN Iax 2024vjm. JWST observations provide unprecedented MIR spectroscopy of SN Iax, spanning from +11 to +42 day past maximum light. We detect forbidden emission lines in the MIR at these early times while the optical and NIR are dominated by permitted lines with an absorption component. Panchromatic spectra at early times can thus simultaneously show nebular and photospheric lines, probing both inner and outer layers of the ejecta. We identify spectral lines not seen before in SN Iax, including [Mg ii ] 4.76 μ m, [Mg ii ] 9.71 μ m, [Ne ii ] 12.81 μ m, and isolated O i 2.76 μ m that traces unburned material. Forbidden emission lines of all species are centrally peaked with similar kinematic distributions, indicating that the ejecta are well mixed in both SN 2024pxl and SN 2024vjm, a hallmark of pure deflagration explosion models. Radiative transfer modeling of SN 2024pxl shows good agreement with a weak deflagration of a near-Chandrasekhar-mass white dwarf, but additional IR flux is needed to match the observations, potentially attributable to a surviving remnant. Similarly, we find SN 2024vjm is also best explained by a weak deflagration model, despite the large difference in luminosity between the two supernovae. Future modeling should push to even weaker explosions and include the contribution of a bound remnant. Our observations demonstrate the diagnostic power of panchromatic spectroscopy for unveiling explosion physics in thermonuclear supernovae.

Topik & Kata Kunci

Astrophysics

Penulis (92)

Lindsey A. Kwok

Mridweeka Singh

Saurabh W. Jha

Stéphane Blondin

Raya Dastidar

Conor Larison

Adam A. Miller

Jennifer E. Andrews

Moira Andrews

G. C. Anupama

Katie Auchettl

Dominik Bánhidi

Barnabas Barna

K. Azalee Bostroem

Thomas G. Brink

Régis Cartier

Ping Chen

Collin T. Christy

David A. Coulter

Sofia Covarrubias

Kyle W. Davis

Connor B. Dickinson

Yize Dong

Joseph R. Farah

Alexei V. Filippenko

Andreas Flörs

Ryan J. Foley

Noah Franz

Christoffer Fremling

Lluís Galbany

Anjasha Gangopadhyay

Aarna Garg

Peter Garnavich

Elinor L. Gates

Or Graur

Alexa C. Gordon

Daichi Hiramatsu

Emily Hoang

D. Andrew Howell

Brian Hsu

Joel Johansson

Arti Joshi

Lordrick A. Kahinga

Ravjit Kaur

Sahana Kumar

Piramon Kumnurdmanee

Hanindyo Kuncarayakti

Natalie LeBaron

Chang Liu

Keiichi Maeda

Kate Maguire

Curtis McCully

Darshana Mehta

Luca M. Menotti

Anne J. Metevier

Kuntal Misra

C. Tanner Murphey

Megan Newsome

Estefania Padilla Gonzalez

Kishore C. Patra

Jeniveve Pearson

Anthony L. Piro

Abigail Polin

Aravind P. Ravi

Armin Rest

Nabeel Rehemtulla

Nicolas Meza Retamal

Olivia M. Robinson

César Rojas-Bravo

Devendra K. Sahu

David J. Sand

Brian P. Schmidt

Steve Schulze

Michaela Schwab

Manisha Shrestha

Matthew R. Siebert

Sunil Simha

Nathan Smith

Jesper Sollerman

Bhagya M. Subrayan

Tamás Szalai

Kirsty Taggart

Rishabh Singh Teja

Tea Temim

Jacco H. Terwel

Samaporn Tinyanont

Stefano Valenti

Jorge Anais Vilchez

József Vinkó

Aya L. Westerling

Yi Yang

WeiKang Zheng

Format Sitasi

APA MLA BibTeX

Kwok, L.A., Singh, M., Jha, S.W., Blondin, S., Dastidar, R., Larison, C. et al. (2025). JWST and Ground-based Observations of the Type Iax Supernovae SN 2024pxl and SN 2024vjm: Evidence for Weak Deflagration Explosions. https://doi.org/10.3847/2041-8213/adf062

@article{kwok2025, author = {Lindsey A. Kwok and Mridweeka Singh and Saurabh W. Jha and Stéphane Blondin and Raya Dastidar and Conor Larison and Adam A. Miller and Jennifer E. Andrews and Moira Andrews and G. C. Anupama and Katie Auchettl and Dominik Bánhidi and Barnabas Barna and K. Azalee Bostroem and Thomas G. Brink and Régis Cartier and Ping Chen and Collin T. Christy and David A. Coulter and Sofia Covarrubias and Kyle W. Davis and Connor B. Dickinson and Yize Dong and Joseph R. Farah and Alexei V. Filippenko and Andreas Flörs and Ryan J. Foley and Noah Franz and Christoffer Fremling and Lluís Galbany and Anjasha Gangopadhyay and Aarna Garg and Peter Garnavich and Elinor L. Gates and Or Graur and Alexa C. Gordon and Daichi Hiramatsu and Emily Hoang and D. Andrew Howell and Brian Hsu and Joel Johansson and Arti Joshi and Lordrick A. Kahinga and Ravjit Kaur and Sahana Kumar and Piramon Kumnurdmanee and Hanindyo Kuncarayakti and Natalie LeBaron and Chang Liu and Keiichi Maeda and Kate Maguire and Curtis McCully and Darshana Mehta and Luca M. Menotti and Anne J. Metevier and Kuntal Misra and C. Tanner Murphey and Megan Newsome and Estefania Padilla Gonzalez and Kishore C. Patra and Jeniveve Pearson and Anthony L. Piro and Abigail Polin and Aravind P. Ravi and Armin Rest and Nabeel Rehemtulla and Nicolas Meza Retamal and Olivia M. Robinson and César Rojas-Bravo and Devendra K. Sahu and David J. Sand and Brian P. Schmidt and Steve Schulze and Michaela Schwab and Manisha Shrestha and Matthew R. Siebert and Sunil Simha and Nathan Smith and Jesper Sollerman and Bhagya M. Subrayan and Tamás Szalai and Kirsty Taggart and Rishabh Singh Teja and Tea Temim and Jacco H. Terwel and Samaporn Tinyanont and Stefano Valenti and Jorge Anais Vilchez and József Vinkó and Aya L. Westerling and Yi Yang and WeiKang Zheng}, title = {JWST and Ground-based Observations of the Type Iax Supernovae SN 2024pxl and SN 2024vjm: Evidence for Weak Deflagration Explosions}, year = {2025}, journal = {DOAJ}, doi = {10.3847/2041-8213/adf062}, url = {https://doi.org/10.3847/2041-8213/adf062}, }

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.3847/2041-8213/adf062
Akses: Open Access ✓