SN 1998bw at Late Phases

2000/06/28 by J. Sollerman, Jesper Sollerman, Cecilia Kozma +8 · 3 citations
Mathematics · Physics and Astronomy · #Astrobiology #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Geometry #Light curve #Line (geometry) #Mathematics #Mixing (physics) #Physics #Quantum mechanics #Supernova #astro-ph

paper · pdf · doi:10.1086/312763

published as Astrophys.J. 537 (2000) 127-130 · With 3 figures Accepted for ApJ Letters

arxiv created 2000/06/28 · openalex publication_date 2000/07/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

We present observations of the peculiar supernova SN 1998bw, which was probably associated with GRB 980425. The photometric and spectroscopic evolution is monitored up to 500 days past explosion. We also present modeling based on spherically symmetric, massive progenitor models and very energetic explosions. The models allow line identification and clearly show the importance of mixing. From the late light curves, we estimate that ~0.3-0.9 M ☉ of ejected 56 Ni is required to power the supernova.

Citations

• The Peculiar Type II Supernova 1997D: A Case for a Very Low [TSUP]56[/TSUP]N[CLC]i[/CLC] Mass
• The Late‐Time Light Curve of SN 1998bw Associated with GRB 980425

Cited by

• EP250108a/SN 2025kg: A Jet-Driven Stellar Explosion Interacting With Circumstellar Material
• Light Curve and Spectral Models for the Hypernova SN 1998bw Associated with GRB 980425
• The chemical evolution of the Galaxy: the importance of stars with an initial mass larger than 40 M⊙