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JWST Observations of SN 2024abup: First Detection of CO in a Broad-lined Type Ic Supernova and Constraints on r-process Nucleosynthesis

Authors: Manisha Shrestha, Lindsey A. Kwok, David J. Sand, Stan Barmentloo, Collin Christy, Anders Jerkstrand, K. Azalee Bostroem, Jennifer E. Andrews, Kate D. Alexander, Yize Dong, 一泽董, C. E. Fields, Emily Hoang, Griffin Hosseinzadeh, Brian Hsu, Daryl Janzen, Saurabh W. Jha, Joel Johansson, Jeniveve Pearson, M. J. Lundquist, Darshana Mehta, Aidan Martas, Maryam Modjaz, Bernhard Müller, Conor L. Ransome, Aravind P. Ravi, Mathieu Renzo, Nicolás Meza Retamal, Bhagya Subrayan, Nathan Smith, Stefano Valenti, Sergiy Vasylyev, Giacomo Ricigliano, Peter J. Brown, Moira Andrews, Joseph Farah, D. Andrew Howell, Curtis McCully, Megan Newsome, Kathryn Wynn, Ryan Chornock, Natalie LeBaron, Raffaella Margutti, Melissa Shahbandeh, Chris Ashall, Peter Hoeflich

Manisha Shrestha et al 2026 The Astrophysical Journal Letters 1009 .

Provider: AAS Journals

Caption: Figure 7.

JWST spectrum of SN 2024abup at +41 days after V-band maximum, overlaid with r-process element lines from G. Ricigliano et al. (2025; solid red) and light element lines (colored dashed). The spectral features are more consistent with light elements, though line broadening may produce blending that complicates this identification. Insets show zoomed views of each individual feature.

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