Transitional events in the spectrophotometric regime between stripped envelope and superluminous supernovae

The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well-defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshol...

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Detalles Bibliográficos
Autores: Prentice, S.J., Inserra, Cosimo, Schulze, Steve, Nicholl, Matt, Mazzali, Paolo A., Vergani, Susanna D., Galbany, Lluís, Anderson, Joseph P., Ashall, Chris, Chen, T. W., Deckers, M., Delgado Mancheño, M., González-Díaz, Raúl, González-Gaitán, Santiago, Gromadzki, Mariusz, Gutiérrez, Claudia P., Harvey, L., Kozyreva, A., Magee, Mark R., Maguire, Kate, Müller-Bravo, Tomás E., Muñoz Torres, S., Pessi, P. J., Sollerman, Jesper, Teffs, J., Terwel, J. H., Young, D. R.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/262528
Acceso en línea:http://hdl.handle.net/10261/262528
Access Level:acceso abierto
Palabra clave:Supernovae: general
Descripción
Sumario:The division between stripped-envelope supernovae (SE-SNe) and superluminous supernovae (SLSNe) is not well-defined in either photometric or spectroscopic space. While a sharp luminosity threshold has been suggested, there remains an increasing number of transitional objects that reach this threshold without the spectroscopic signatures common to SLSNe. In this work, we present data and analysis on four SNe transitional between SE-SNe and SLSNe; the He-poor SNe 2019dwa and 2019cri, and the He-rich SNe 2019hge and 2019unb. Each object displays long-lived and variable photometric evolution with luminosities around the SLSN threshold of Mr < -19.8 mag. Spectroscopically however, these objects are similar to SE-SNe, with line velocities lower than either SE-SNe and SLSNe, and thus represent an interesting case of rare transitional events.