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Title: Superluminous Supernovae from the Dark Energy Survey

Abstract

We present a sample of 21 hydrogen-free superluminous supernovae (SLSNe-I) and one hydrogen-rich SLSN (SLSN-II) detected during the five-year Dark Energy Survey (DES). These SNe, located in the redshift range 0.220 < z < 1.998, represent the largest homogeneously selected sample of SLSN events at high redshift. We present the observed $g, r, i, z$ light curves for these SNe, which we interpolate using Gaussian processes. The resulting light curves are analysed to determine the luminosity function of SLSNe-I, and their evolutionary time-scales. The DES SLSN-I sample significantly broadens the distribution of SLSN-I light-curve properties when combined with existing samples from the literature. We fit a magnetar model to our SLSNe, and find that this model alone is unable to replicate the behaviour of many of the bolometric light curves. We search the DES SLSN-I light curves for the presence of initial peaks prior to the main light-curve peak. Using a shock breakout model, our Monte Carlo search finds that 3 of our 14 events with pre-max data display such initial peaks. However, 10 events show no evidence for such peaks, in some cases down to an absolute magnitude of <-16, suggesting that such features are not ubiquitous to allmore » SLSN-I events. Finally, we also identify a red pre-peak feature within the light curve of one SLSN, which is comparable to that observed within SN2018bsz.« less

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
Contributing Org.:
DES; DES Collaboration
OSTI Identifier:
1531214
Alternate Identifier(s):
OSTI ID: 1490844
Report Number(s):
arXiv:1812.04071; FERMILAB-PUB-18-669-AE
1708636
Grant/Contract Number:  
AC02-07CH11359; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Mon.Not.Roy.Astron.Soc.
Additional Journal Information:
Journal Volume: 487
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; supernovae: general

Citation Formats

Angus, C. R., and et al. Superluminous Supernovae from the Dark Energy Survey. United States: N. p., 2019. Web. doi:10.1093/mnras/stz1321.
Angus, C. R., & et al. Superluminous Supernovae from the Dark Energy Survey. United States. doi:10.1093/mnras/stz1321.
Angus, C. R., and et al. Tue . "Superluminous Supernovae from the Dark Energy Survey". United States. doi:10.1093/mnras/stz1321.
@article{osti_1531214,
title = {Superluminous Supernovae from the Dark Energy Survey},
author = {Angus, C. R. and et al.},
abstractNote = {We present a sample of 21 hydrogen-free superluminous supernovae (SLSNe-I) and one hydrogen-rich SLSN (SLSN-II) detected during the five-year Dark Energy Survey (DES). These SNe, located in the redshift range 0.220 < z < 1.998, represent the largest homogeneously selected sample of SLSN events at high redshift. We present the observed $g, r, i, z$ light curves for these SNe, which we interpolate using Gaussian processes. The resulting light curves are analysed to determine the luminosity function of SLSNe-I, and their evolutionary time-scales. The DES SLSN-I sample significantly broadens the distribution of SLSN-I light-curve properties when combined with existing samples from the literature. We fit a magnetar model to our SLSNe, and find that this model alone is unable to replicate the behaviour of many of the bolometric light curves. We search the DES SLSN-I light curves for the presence of initial peaks prior to the main light-curve peak. Using a shock breakout model, our Monte Carlo search finds that 3 of our 14 events with pre-max data display such initial peaks. However, 10 events show no evidence for such peaks, in some cases down to an absolute magnitude of <-16, suggesting that such features are not ubiquitous to all SLSN-I events. Finally, we also identify a red pre-peak feature within the light curve of one SLSN, which is comparable to that observed within SN2018bsz.},
doi = {10.1093/mnras/stz1321},
journal = {Mon.Not.Roy.Astron.Soc.},
number = ,
volume = 487,
place = {United States},
year = {2019},
month = {5}
}

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This content will become publicly available on May 21, 2020
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