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Progenitor and Early Evolution of the Type IIb SN 2016gkg

Tartaglia, L. and Fraser, M. and Sand, D. J. and Valenti, S. and Smartt, S. J. and McCully, C. and Anderson, J. P. and Arcavi, I. and Elias-Rosa, N. and Galbany, L. and Gal-Yam, A. and Haislip, J and Hosseinzadeh, G. and Howell, D. A. and Inserra, C. and Jha, S. W. and Kankare, E. and Lundqvist, P. and Maguire, K. and Mattila, S. and Reichart, D. and Smith, K. W. and Smith, M. and Stritzinger, M. and Sullivan, M. and Taddia, F. and Tomasella, L. (2017) Progenitor and Early Evolution of the Type IIb SN 2016gkg. Astrophysical Journal Letters, 836 (1). Art. No. L12. ISSN 2041-8213.

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We report initial observations and analysis on the Type IIb SN 2016gkg in the nearby galaxy NGC 613. SN 2016gkg exhibited a clear double-peaked light curve during its early evolution, as evidenced by our intensive photometric follow-up campaign. SN 2016gkg shows strong similarities with other Type IIb SNe, in particular, with respect to the He I emission features observed in both the optical and near-infrared. SN 2016gkg evolved faster than the prototypical Type IIb SN 1993J, with a decline similar to that of SN 2011dh after the first peak. The analysis of archival Hubble Space Telescope images indicate a pre-explosion source at SN 2016gkg's position, suggesting a progenitor star with a ~mid-F spectral type and initial mass 15-20 M⊙, depending on the distance modulus adopted for NGC 613. Modeling the temperature evolution within 5 days of explosion, we obtain a progenitor radius of ~48-124 R⊙, smaller than that obtained from the analysis of the pre-explosion images (240-320 R⊙).

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Tartaglia, L.0000-0003-3433-1492
Fraser, M.0000-0003-2191-1674
Sand, D. J.0000-0003-4102-380X
Valenti, S.0000-0001-8818-0795
Smartt, S. J.0000-0002-8229-1731
McCully, C.0000-0001-5807-7893
Anderson, J. P.0000-0003-0227-3451
Arcavi, I.0000-0001-7090-4898
Elias-Rosa, N.0000-0002-1381-9125
Galbany, L.0000-0002-1296-6887
Gal-Yam, A.0000-0002-3653-5598
Hosseinzadeh, G.0000-0002-0832-2974
Howell, D. A.0000-0003-4253-656X
Inserra, C.0000-0002-3968-4409
Jha, S. W.0000-0001-8738-6011
Kankare, E.0000-0001-8257-3512
Lundqvist, P.0000-0002-3664-8082
Maguire, K.0000-0002-9770-3508
Mattila, S.0000-0001-7497-2994
Reichart, D.0000-0002-5060-3673
Smith, M.0000-0002-3321-1432
Stritzinger, M.0000-0002-5571-1833
Sullivan, M.0000-0001-9053-4820
Taddia, F.0000-0002-2387-6801
Additional Information:© 2017 The American Astronomical Society. Received 2016 November 2; revised 2017 January 11; accepted 2017 January 25; published 2017 February 10. Based on data from: ESO as part of PESSTO (197.D-1075.191.D-0935) and under programme 097.D-0762(A). Gemini Observatory under GS-2016B-Q-22 (PI: Sand). The Nordic Optical Telescope of the Instituto de Astrofísica de Canarias. The European Organisation for Astronomical Research in the southern hemisphere under ESO programme 198.A-0915(A). FOSCGUI is a graphic user interface aimed at extracting SN spectroscopy and photometry obtained with FOSC-like instruments, developed by E. Cappellaro. D.J.S. acknowledges NSF grants AST-1412504 and AST-1517649. S.J.S. acknowledges EU/FP7-ERC grant 29122. M.F. acknowledges the support of a Royal Society—Science Foundation Ireland University Research Fellowship. L.G. was supported in part by the US National Science Foundation under grant AST-1311862. M.S. acknowledges support from EU/FP7-ERC grant number 615929. K.M. acknowledges support from STFC through an Ernest Rutherford Fellowship. D.A.H., C.M., and G.H. are funded by NSF AST-1313484. Support for I.A. was provided by NASA through the Einstein Fellowship Program, grant PF6-170148. N.E.R. acknowledges financial support by the 1994 PRIN-INAF 2014 (project "Transient universe: unveiling new types of stellar explosions with PESSTO") and by MIUR PRIN 2010-2011, "The dark universe and the cosmic evolution of baryons: from current surveys to Euclid." M.S. acknowledges support from the Danish Agency for Science and Technology and Innovation via a Sapere Aude Level 2 grant, the Villum foundation, and the Instrumentcenter for Danish Astrophysics (IDA).
Group:Palomar Transient Factory
Funding AgencyGrant Number
European Research Council (ERC)29122
Science Foundation IrelandUNSPECIFIED
European Research Council (ERC)615929
Science and Technology Facilities Council (STFC)UNSPECIFIED
NASA Einstein FellowshipPF6-170148
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Danish Agency for Science and Technology and InnovationUNSPECIFIED
Villum FoundationUNSPECIFIED
Instrumentcenter for Danish AstrophysicsUNSPECIFIED
Subject Keywords:supernovae: general – supernovae: individual (2016gkg)
Issue or Number:1
Record Number:CaltechAUTHORS:20190528-161442964
Persistent URL:
Official Citation:L. Tartaglia et al 2017 ApJL 836 L12
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95839
Deposited By: Tony Diaz
Deposited On:30 May 2019 21:24
Last Modified:20 Nov 2019 23:32

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