SN 2014C: a metamorphic supernova exploded in the intricate and hydrogen-rich surroundings
Qian Zhai, Jujia Zhang, Weili Lin, Paolo Mazzali, Elena Pian, Stefano, Benetti, Lina Tomasella, Jialian Liu, Liping Li

TL;DR
SN 2014C initially appeared as a typical Type Ib supernova but showed signs of hydrogen interaction early on, indicating complex circumstellar environment and additional energy sources beyond radioactive decay.
Contribution
This study provides detailed early observations of SN 2014C, revealing the presence of hydrogen and circumstellar interaction, which challenges the traditional classification of supernovae.
Findings
SN 2014C had a higher peak luminosity and faster rise than typical SNe Ib.
Presence of high-velocity hydrogen suggests a hydrogen-rich progenitor envelope.
Evidence of early interaction with circumstellar medium affecting the supernova's brightness evolution.
Abstract
We present photometric and spectroscopic observations of supernova (SN) 2014C, primarily emphasizing the initial month after the explosion at approximately daily intervals. During this time, it was classified as a Type Ib SN exhibiting a notably higher peak luminosity (), a faster rise to brightness ( d), and a more gradual dimming ( mag) compared to typical SNe Ib. Analysis of the velocity evolution over the first 20 days after the explosion supports the view that the absorption near 6200\AA is due to high-velocity H in the outer layers of the ejecta, indicating the presence of a small amount of hydrogen in the envelope of progenitor before the explosion. Assuming the peak luminosity is entirely attributed to radioactive decay, we estimate that 0.14 ${\rm…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsGamma-ray bursts and supernovae
