JWST Observations of SN 2024ggi. I. Interpretation and Model Comparison of the Type II Supernova 2024ggi at 55 Days past Explosion

Abstract We present panchromatic 0.4–21 μ m observations of the nearby (∼7.2 Mpc) Type II supernova (SN) 2024ggi, obtained during the plateau phase at ∼55 days past explosion. Our data set includes JWST spectra spanning 1.7–14 μ m, mid-infrared (MIR) imaging at 7.7 and 21 μ m, and near-simultaneous ground-based optical and near-infrared (NIR) spectra covering 0.32−1.8 μ m. The NIR and MIR spectral features of SN 2024ggi are dominated by H i emission. We present line IDs and a toy PHOENIX/1D model that reproduces the observations well, especially the continuum redward of 0.9 μ m. We compare SN 2024ggi to SN 2022acko and SN 2023ixf, two other Type II SNe that were also observed by JWST, and highlight key similarities and differences in their spectral features. No evidence for a MIR excess or dust is found at these epochs, with the model matching the observed flux out to 21 μ m. We discuss the model’s shortcomings, focusing on the density profile, which suppresses line blanketing and produces features in the optical that are too narrow. Our results show the power of panchromatic studies in both exploring the nature of the SN ejecta and constraining detailed models of SNe.

Authors

Institutions

Publication Details

Journal
The Astrophysical Journal
Published
2025-11-28
DOI
https://doi.org/10.3847/1538-4357/ae0e15
Citations
2
Primary Topic
Gamma-ray bursts and supernovae
Type
article
Field-Weighted Citation Impact
2.31
Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

JWST Observations of SN 2024ggi. I. Interpretation and Model Comparison of the Type II Supernova 2024ggi at 55 Days past Explosion

Qinan Wang, K. Medler, D. O. Jones, G. Folatelli et al.
2 citations
The Astrophysical Journal
Gamma-ray bursts and supernovae
2.31
article

JWST Observations of SN 2024ggi. I. Interpretation and Model Comparison of the Type II Supernova 2024ggi at 55 Days past Explosion

Qinan Wang, K. Medler, D. O. Jones, G. Folatelli, Muryel Guolo, Sagiv Shiber, L. Galbany, Yi Yang, Tyco Mera Evans, N. B. Suntzeff, Douglas A. Coulter, A. Rest, Anthony Burrow, Michael Engesser, Jason T. Hinkle, C. R. Burns, P. J. Brown, B. J. Shappee, Samaporn Tinyanont, J. M. DerKacy, C. M. Pfeffer, P. Hoêflich, M. E. Huber, Louis-Gregory Strolger, M. A. Tucker, M. Stritzinger, Jing Lü, W. B. Hoogendam, Ori D. Fox, Thomas de Jaeger, Katie Auchettl, N. Morrell, M. M. Phillips, Melissa Shahbandeh, E. Baron, Sahana Kumar, Tea Temim, P. A. Mazzali, Eric Y. Hsiao, Lifan Wang, Chris Ashall, E. Fereidouni, Jian Shi
article en
2 citations

Abstract

Abstract We present panchromatic 0.4–21 μ m observations of the nearby (∼7.2 Mpc) Type II supernova (SN) 2024ggi, obtained during the plateau phase at ∼55 days past explosion. Our data set includes JWST spectra spanning 1.7–14 μ m, mid-infrared (MIR) imaging at 7.7 and 21 μ m, and near-simultaneous ground-based optical and near-infrared (NIR) spectra covering 0.32−1.8 μ m. The NIR and MIR spectral features of SN 2024ggi are dominated by H i emission. We present line IDs and a toy PHOENIX/1D model that reproduces the observations well, especially the continuum redward of 0.9 μ m. We compare SN 2024ggi to SN 2022acko and SN 2023ixf, two other Type II SNe that were also observed by JWST, and highlight key similarities and differences in their spectral features. No evidence for a MIR excess or dust is found at these epochs, with the model matching the observed flux out to 21 μ m. We discuss the model’s shortcomings, focusing on the density profile, which suppresses line blanketing and produces features in the optical that are too narrow. Our results show the power of panchromatic studies in both exploring the nature of the SN ejecta and constraining detailed models of SNe.

The Astrophysical JournalVol. 994(2)
Florida State University (US), University of Hawaiʻi at Mānoa (US), Centre National de la Recherche Scientifique (FR), Space Telescope Science Institute (US), Planetary Science Institute (US), Institute of Space Sciences (ES), Johns Hopkins University (US), Consejo Nacional de Investigaciones Científicas y Técnicas (AR), Universität Hamburg (DE), The University of Melbourne (AU), Kavli Institute for the Physics and Mathematics of the Universe (JP), University of California, Santa Cruz (US), Carnegie Institution for Science (US), Princeton University (US), Aarhus University (DK), Université Paris Cité (FR), Mitchell Institute (US), Sorbonne Université (FR), Institut d'Estudis Espacials de Catalunya (ES), Max Planck Institute for Astrophysics (DE), McCormick (United States) (US), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Carnegie Observatories (US), Las Campanas Observatory (CL), Hamburger Fern-Hochschule (DE), Instituto de Astrofísica de La Plata, University of Virginia (US), The Ohio State University (US), Liverpool John Moores University (GB), Massachusetts Institute of Technology (US), The University of Tokyo (JP), National Astronomical Research Institute of Thailand (TH), Virginia Tech (US), University of Oklahoma (US), Michigan State University (US), Universidad Nacional de La Plata (AR), Texas A&M University (US), University of California, Berkeley (US), Tsinghua University (CN)
Openalex Percentile: Top 10%
Gamma-ray bursts and supernovae
2.31
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.