Photometric and spectroscopic analysis of the Type II SN 2020jfo with a short plateau

B. Ailawadhi*, R. Dastidar*, K. Misra*, R. Roy, D. Hiramatsu, D. A. Howell, T. G. Brink, W. Zheng, L. Galbany, M. Shahbandeh, I. Arcavi, C. Ashall, K. A. Bostroem, J. Burke, T. Chapman, Dimple, A. V. Filippenko, A. Gangopadhyay, A. Ghosh, A. M. HoffmanG. Hosseinzadeh, C. Jennings, V. K. Jha, A. Kumar, E. Karamehmetoglu, C. McCully, E. McGinness, T. E. Müller-Bravo, Y. S. Murakami, S. B. Pandey, C. Pellegrino, L. Piscarreta, J. Rho, M. Stritzinger, J. Sunseri, S. D. Van Dyk, L. Yadav

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We present high-cadence photometric and spectroscopic observations of SN 2020jfo in ultraviolet and optical/near-infrared bands starting from ∼3 to ∼434 d after the explosion, including the earliest data with the 10.4-m GTC. SN 2020jfo is a hydrogen-rich Type II SN with a relatively short plateau duration (67.0 ± 0.6 d). When compared to other Type II supernovae (SNe) of similar or shorter plateau lengths, SN 2020jfo exhibits a fainter peak absolute V-band magnitude (MV = −16.90 ± 0.34 mag). SN 2020jfo shows significant Hα absorption in the plateau phase similar to that of typical SNe II. The emission line of stable [Ni II] λ7378, mostly seen in low-luminosity SNe II, is very prominent in the nebular-phase spectra of SN 2020jfo. Using the relative strengths of [Ni II] λ7378 and [Fe II] λ7155, we derive the Ni/Fe production (abundance) ratio of 0.08–0.10, which is ∼1.5 times the solar value. The progenitor mass of SN 2020jfo from nebular-phase spectral modelling and semi-analytical modelling falls in the range of 12–15 M. Furthermore, semi-analytical modelling suggests a massive H envelope in the progenitor of SN 2020jfo, which is unlikely for SNe II having short plateaus.

Original languageEnglish
Pages (from-to)248-270
Number of pages23
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
StatePublished - 1 Feb 2023


FundersFunder number
Aryabhatta Research Institute of Observational Sciences
AutoScope Corporation
Centro Superior de Investigaciones Científicas20215AT016
Christopher R. Redlich Fund
TABASGO Foundation
Unidad de Excelencia María de Maeztu CEX2020-001058-MJAEICU-21-ICE-09
University of California, the Sylvia & Jim Katzman Foundation
Villum Fonden Experiment28021
National Science Foundation
National Aeronautics and Space Administration
Adolph C. and Mary Sprague Miller Institute for Basic Research in Science, University of California Berkeley
Heising-Simons Foundation
University of California Observatories
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Fondo Nacional de Desarrollo Científico y Tecnológico3220449
Ministerio de Ciencia e Innovación
European Social FundPID2020-115253GAI00, RYC2019-027683-I
Agencia Estatal de Investigación
Danmarks Frie Forskningsfond8021-00170B
Agencia Nacional de Investigación y Desarrollo


    • galaxies: individual: M61
    • supernovae: general
    • supernovae: individual: SN 2020jfo
    • techniques: photometric
    • techniques: spectroscopic


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