Volume 650, June 2021
|Number of page(s)||11|
|Section||Stellar structure and evolution|
|Published online||25 June 2021|
Department of Astronomy and the Oskar Klein Centre, Stockholm University, AlbaNova, 106 91 Stockholm, Sweden
2 INAF – Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy
3 INAF – Osservatorio Astronomico di Trieste, Via G.B. Tiepolo, 11, 34143 Trieste, Italy
4 Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Vesilinnantie 5, 20014 Turku, Finland
5 Aalto University Metsähovi Radio Observatory, Metsähovintie 114, 02540 Kylmälä, Finland
6 Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
7 DIRAC Institute, Department of Astronomy, University of Washington, 3910 15th Avenue NE, Seattle, WA 98195, USA
8 Cahill Center for Astrophysics, California Institute of Technology, MC 249-17, 1200 E California Boulevard, Pasadena, CA 91125, USA
9 Department of Astronomy, University of Maryland, College Park, MD 20742, USA
10 Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA
11 Department of Particle Physics and Astrophysics, Weizmann Institute of Science, 234 Herzl St., Rehovot 76100, Israel
12 The eScience Institute, University of Washington, Seattle, WA 98195, USA
13 Department of Astronomy and Astrophysics, University of California, Santa Cruz, California 95064, USA
14 Caltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USA
15 Université de Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, 69622 Villeurbanne, France
16 IPAC, California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125, USA
17 Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
Accepted: 14 April 2021
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.
Key words: supernovae: general / supernovae: individual: SN 2018ijp
Photometric tables are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (220.127.116.11) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/650/A174
© ESO 2021
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