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Title: DES15E2mlf: A Spectroscopically Confirmed Superluminous Supernova that Exploded 3.5 Gyr After the Big Bang

We present the Dark Energy Survey (DES) discovery of DES15E2mlf, the most distant superluminous supernova (SLSN) spectroscopically con rmed to date. The light curves and Gemini spectroscopy of DES15E2mlf indicate that it is a Type I superluminous supernova (SLSN-I) at z = 1:861 (a lookback time of 10 Gyr) and peaking at MAB = -22:3 0:1 mag. Given the high redshift, our data probe the rest-frame ultraviolet (1400{3500 A) properties of the SN, nding velocity of the Ciii feature changes by 5600kms -1 over 14 days around maximum light. We nd the host galaxy of DES15E2mlf has a stellar mass of 3:5+3:6 -2:4 109 M , which is more massive than the typical SLSN-I host galaxy.
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Publication Date:
Report Number(s):
arXiv:1707.06649; FERMILAB-PUB-16-614-AE
Journal ID: ISSN 0035-8711; TRN: US1702484
Grant/Contract Number:
AC02-76SF00515; AC02-07CH11359; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 470; Journal Issue: 4; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Research Org:
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); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
DES Collaboration
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; supernovae: general; supernovae: individual: DES15E2mlf
OSTI Identifier:
1390594
Alternate Identifier(s):
OSTI ID: 1407119; OSTI ID: 1418323; OSTI ID: 1436164