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SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell?

Tartaglia, L. and Sollerman, J. and Barbarino, C. and Taddia, F. and Mason, E. and Berton, M. and Taggart, K. and Bellm, E. C. and De, K. and Frederick, S. and Fremling, C. and Gal-Yam, A. and Golkhou, V. Z. and Graham, M. and Ho, A. Y. Q. and Hung, T. and Kaye, S. and Kim, Y. L. and Laher, R. R. and Masci, F. J. and Perley, D. A. and Porter, M. D. and Reiley, D. J. and Riddle, R. and Rusholme, B. and Soumagnac, M. T. and Walters, R. (2021) SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell? Astronomy and Astrophysics, 650 . Art. No. A174. ISSN 0004-6361. doi:10.1051/0004-6361/202039068.

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In this paper, we discuss the outcomes of the follow-up campaign of SN 2018ijp, discovered as part of the Zwicky Transient Facility survey for optical transients. Its first spectrum shows similarities to broad-lined Type Ic supernovae around maximum light, whereas later spectra display strong signatures of interaction between rapidly expanding ejecta and a dense H-rich circumstellar medium, coinciding with a second peak in the photometric evolution of the transient. This evolution, along with the results of modeling of the first light-curve peak, suggests a scenario where a stripped star exploded within a dense circumstellar medium. The two main phases in the evolution of the transient could be interpreted as a first phase dominated by radioactive decays, and a later interaction-dominated phase where the ejecta collide with a pre-existing shell. We therefore discuss SN 2018jp within the context of a massive star depleted of its outer layers exploding within a dense H-rich circumstellar medium.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Tartaglia, L.0000-0003-3433-1492
Sollerman, J.0000-0003-1546-6615
Barbarino, C.0000-0002-3821-6144
Taddia, F.0000-0002-2387-6801
Berton, M.0000-0002-1058-9109
Taggart, K.0000-0002-5748-4558
Bellm, E. C.0000-0001-8018-5348
De, K.0000-0002-8989-0542
Frederick, S.0000-0001-9676-730X
Fremling, C.0000-0002-4223-103X
Gal-Yam, A.0000-0002-3653-5598
Golkhou, V. Z.0000-0001-8205-2506
Graham, M.0000-0002-3168-0139
Ho, A. Y. Q.0000-0002-9017-3567
Hung, T.0000-0002-9878-7889
Laher, R. R.0000-0003-2451-5482
Masci, F. J.0000-0002-8532-9395
Perley, D. A.0000-0001-8472-1996
Porter, M. D.0000-0003-3168-5586
Riddle, R.0000-0002-0387-370X
Rusholme, B.0000-0001-7648-4142
Soumagnac, M. T.0000-0001-6753-1488
Walters, R.0000-0002-1835-6078
Additional Information:© ESO 2021. Article published by EDP Sciences. Received 30 July 2020; Accepted 14 April 2021; Published online 25 June 2021. The Oskar Klein Centre is funded by the Swedish Research Council. Based on observations obtained with the Samuel Oschin Telescope 48-inch and the 60-inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under Grant No. AST-1440341 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, the University of Washington, Deutsches Elektronen-Synchrotron and Humboldt University, Los Alamos National Laboratories, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, and Lawrence Berkeley National Laboratories. Operations are conducted by COO, IPAC, and UW. SED Machine is based upon work supported by the National Science Foundation under Grant No. 1106171 The data presented here were partly obtained with ALFOSC, which is provided by the Instituto de Astrofisica de Andalucia (IAA) under a joint agreement with the University of Copenhagen and NOTSA. The Liverpool Telescope is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology. This research has made use of the NASA/IPAC Infrared Science Archive, which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology. This work was supported by the GROWTH project funded by the National Science Foundation under Grant No 1545949. Funding for the Sloan Digital Sky Survey (SDSS) has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Aeronautics and Space Administration, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. The SDSS website is The SDSS is managed by the Astrophysical Research Consortium (ARC) for the Participating Institutions. The Participating Institutions are The University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, University of Pittsburgh, Princeton University, the United States Naval Observatory, and the University of Washington. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation Grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation. L.T. acknowledges support from MIUR (PRIN 2017 grant 20179ZF5KS). Y.-L.K. has received funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation program (grant agreement No. 759194 USNAC). This research has made use of the SVO Filter Profile Service ( supported from the Spanish MINECO through grant AYA2017-84089 IRAF is distributed by the National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. SNOOPy is a package for SN photometry using PSF fitting and/or template subtraction developed by E. Cappellaro. A package description can be found at FOSCGUI is a graphic user interface aimed at extracting SN spectroscopy and photometry obtained with FOSC-like instruments. It was developed by E. Cappellaro. A package description can be found at
Group:Infrared Processing and Analysis Center (IPAC), Zwicky Transient Facility
Funding AgencyGrant Number
ZTF partner institutionsUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Participating InstitutionsUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Japanese MonbukagakushoUNSPECIFIED
Max Planck SocietyUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)20179ZF5KS
European Research Council (ERC)759194
Ministerio de Economía, Industria y Competitividad (MINECO)AYA2017-84089
Subject Keywords:supernovae: general – supernovae: individual: SN 2018ijp
Record Number:CaltechAUTHORS:20200916-112942074
Persistent URL:
Official Citation:SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell? L. Tartaglia, J. Sollerman, C. Barbarino, F. Taddia, E. Mason, M. Berton, K. Taggart, E. C. Bellm, K. De, S. Frederick, C. Fremling, A. Gal-Yam, V. Z. Golkhou, M. Graham, A. Y. Q. Ho, T. Hung, S. Kaye, Y.-L. Kim, R. R. Laher, F. J. Masci, D. A. Perley, M. D. Porter, D. J. Reiley, R. Riddle, B. Rusholme, M. T. Soumagnac and R. Walters. A&A, 650 (2021) A174; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105426
Deposited By: George Porter
Deposited On:16 Sep 2020 22:31
Last Modified:25 Jun 2021 23:07

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