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March 13, 2026

Characterization of Type Ibn Supernovae

D. Farias C. Gall V. A. Villar K. Auchettl K. M. de Soto A. Gagliano W. B. Hoogendam G. Narayan A. Sedgewick S. K. Yadavalli Y. Zenati C. R. Angus K. W. Davis J. Hjorth W. V. Jacobson-Galán D. O. Jones C. D. Kilpatrick M. J. Bustamante Rosell D. A. Coulter G. Dimitriadis R. J. Foley A. Gangopadhyay H. Gao M. E. Huber L. Izzo J. L. Johnson A. L. Piro A. Rest C. Rojas-Bravo M. R. Siebert K. Taggart S. Tinyanont

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Key Points

This research aims to characterize Type Ibn supernovae by exploring their spectral features and light curve properties.
Compiled a sample of 61 Type Ibn supernovae, with photometric and spectroscopic data.
Fitted 24 supernovae using semi-analytical models.
Measured light curves from optical bands (B to z) and analyzed the correlations with spectral features.
Light curves show greater diversity than previously thought, with peak absolute magnitudes of -19.4 ± 0.6 mag.
Identified low-energy explosions of stars with compact envelopes and helium-rich circumstellar material.
Inferred ejecta masses are small, suggesting that the progenitors are likely binary systems.

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Implication

This analysis uncovers diverse light curve properties in Type Ibn supernovae, indicating binary progenitor systems.

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Cite This Study

Farias et al. (2026) studied this question.

synapsesocial.com/papers/69c37bd4b34aaaeb1a67ea07 https://doi.org/10.1051/0004-6361/202555954/pdf

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