Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations

We present an analysis of observed trends and correlations between a large range of spectral and photometric parameters of more than 100 type II supernovae (SNe II), during the photospheric phase. We define a common epoch for all SNe of 50 days post-explosion, where the majority of the sample is lik...

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Autores principales: Gutiérrez, Claudia P., Anderson, Joseph P., Hamuy, Mario, González Gaitan, Santiago, Galbany, Lluis, Dessart, Luc, Stritzinger, Maximilian D., Phillips, Mark M., Morrell, Nidia Irene, Folatelli, Gastón
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
supernovae: general
surveys
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87146
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87146
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
supernovae: general
surveys
spellingShingle Ciencias Astronómicas
supernovae: general
surveys
Gutiérrez, Claudia P.
Anderson, Joseph P.
Hamuy, Mario
González Gaitan, Santiago
Galbany, Lluis
Dessart, Luc
Stritzinger, Maximilian D.
Phillips, Mark M.
Morrell, Nidia Irene
Folatelli, Gastón
Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations
topic_facet Ciencias Astronómicas
supernovae: general
surveys
description We present an analysis of observed trends and correlations between a large range of spectral and photometric parameters of more than 100 type II supernovae (SNe II), during the photospheric phase. We define a common epoch for all SNe of 50 days post-explosion, where the majority of the sample is likely to be under similar physical conditions. Several correlation matrices are produced to search for interesting trends between more than 30 distinct light-curve and spectral properties that characterize the diversity of SNe II. Overall, SNe with higher expansion velocities are brighter, have more rapidly declining light curves, shorter plateau durations, and higher <sup>56</sup>Ni masses. Using a larger sample than previous studies, we argue that "<i>Pd</i>" - the plateau duration from the transition of the initial to "plateau" decline rates to the end of the "plateau" - is a better indicator of the hydrogen envelope mass than the traditionally used optically thick phase duration (<i>OPTd</i>: explosion epoch to end of plateau). This argument is supported by the fact that <i>Pd</i> also correlates with s<sub>3</sub>, the light-curve decline rate at late times: lower <i>Pd</i> values correlate with larger s<sub>3</sub> decline rates. Large s<sub>3</sub> decline rates are likely related to lower envelope masses, which enables gamma-ray escape. We also find a significant anticorrelation between <i>Pd</i> and s<sub>2</sub> (the plateau decline rate), confirming the long standing hypothesis that faster declining SNe II (SNe IIL) are the result of explosions with lower hydrogen envelope masses and therefore have shorter <i>Pd</i> values.
format Articulo
Articulo
author Gutiérrez, Claudia P.
Anderson, Joseph P.
Hamuy, Mario
González Gaitan, Santiago
Galbany, Lluis
Dessart, Luc
Stritzinger, Maximilian D.
Phillips, Mark M.
Morrell, Nidia Irene
Folatelli, Gastón
author_facet Gutiérrez, Claudia P.
Anderson, Joseph P.
Hamuy, Mario
González Gaitan, Santiago
Galbany, Lluis
Dessart, Luc
Stritzinger, Maximilian D.
Phillips, Mark M.
Morrell, Nidia Irene
Folatelli, Gastón
author_sort Gutiérrez, Claudia P.
title Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations
title_short Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations
title_full Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations
title_fullStr Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations
title_full_unstemmed Type II Supernova Spectral Diversity. II. Spectroscopic and Photometric Correlations
title_sort type ii supernova spectral diversity. ii. spectroscopic and photometric correlations
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87146
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