A surge of light at the birth of a supernova

It is difficult to establish the properties of massive stars that explode as supernovae. The electromagnetic emission during the first minutes to hours after the emergence of the shock from the stellar surface conveys important information about the final evolution and structure of the exploding sta...

Descripción completa

Detalles Bibliográficos
Autores: Bersten, Melina Cecilia, Folatelli, Gaston, García, Federico, Van Dyk, S. D., Benvenuto, Omar Gustavo, Orellana, Mariana Dominga, Buso, V., Sánchez, J. L., Tanaka, M., Maeda, K., Filippenko, A. V., Zheng, W., Brink, T. G., Cenko, S. B., de Jaeger, T., Kumar, S., Moriya, T. J., Nomoto, K., Perley, D. A., Shivvers, I., Smith, N.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/82495
Acceso en línea:http://hdl.handle.net/11336/82495
Access Level:acceso abierto
Palabra clave:Hydrodynamics
Supernovae
Sn 2016gkg
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario:It is difficult to establish the properties of massive stars that explode as supernovae. The electromagnetic emission during the first minutes to hours after the emergence of the shock from the stellar surface conveys important information about the final evolution and structure of the exploding star. However, the unpredictable nature of supernova events hinders the detection of this brief initial phase. Here we report the serendipitous discovery of a newly born, normal type IIb supernova (SN 2016gkg), which reveals a rapid brightening at optical wavelengths of about 40 magnitudes per day. The very frequent sampling of the observations allowed us to study in detail the outermost structure of the progenitor of the supernova and the physics of the emergence of the shock. We develop hydrodynamical models of the explosion that naturally account for the complete evolution of the supernova over distinct phases regulated by different physical processes. This result suggests that it is appropriate to decouple the treatment of the shock propagation from the unknown mechanism that triggers the explosion.

Similares en LA Referencia