Detection and Classification of Supernovae beyond z ∼ 2 Redshift with the James Webb Space Telescope

Enik Regs, József Vinkó

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1 Citation (Scopus)


Future time-domain surveys for transient events in the near- and midinfrared bands will significantly extend our understanding about the physics of the early universe. In this paper we study the implications of a deep (∼27 mag), long-term (∼3 yr), observationally inexpensive survey with the James Webb Space Telescope (JWST) within its Continuous Viewing Zone, aimed at discovering luminous supernovae beyond z ∼ 2 redshift. We explore the possibilities for detecting superluminous supernovae (SLSNe) as well as SNe Ia at such high redshifts and estimate their expected numbers within a relatively small (∼0.1 deg 2 ) survey area. It is found that we can expect ∼10 new SLSNe and ∼50 SNe Ia discovered in the 1 < z < 4 redshift range. We show that it is possible to get relatively accurate (σ z ≲ 0.25) photometric redshifts for SNe Ia by fitting their Spectral Energy Distributions, redshifted into the observed near-IR bands, with SN templates. We propose that SNe Ia occupy a relatively narrow range on the JWST F220W-F440W versus F150W-F356W color-color diagram between ±7 rest-frame days around maximum light, which could be a useful classification tool for such types of transients. We also study the possibility of extending the Hubble-diagram of SNe Ia beyond redshift 2 up to z ∼ 4. Such high-z SNe Ia may provide new observational constraints for their progenitor scenario.

Original languageEnglish
Article number158
JournalAstrophysical Journal
Issue number2
Publication statusPublished - Apr 1 2019


  • cosmological parameters
  • distance scale
  • early universe
  • galaxies: stellar content
  • supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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