Detection of a massive dust shell around the Type II supernova SN 2002hh

MJ Barlow*, BEK Sugerman, J Fabbri, M Meixner, RS Fisher, JE Bowey, N Panagia, B Ercolano, GC Clayton, M Cohen, TM Gledhill, K Gordon, AGGM Tielens, AA Zijlstra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

29 Citations (Scopus)

Abstract

Dust emission from the Type II supernova SN 2002hh in NGC 6946 has been detected at mid-infrared wavelengths by the Spitzer Space Telescope from 590 to 758 days after outburst and confirmed by higher angular resolution Gemini North mid-IR observations. The day 600 5.8-24 mu m emission can be fit by a 290 K blackbody having a luminosity of 1.6 x 10(7) L(circle dot). The minimum emitting radius of 1.1 x 10(17) cm is too large for the emitting dust to have been formed in the supernova ejecta. Using radiative transfer models and realistic dust grain parameters, fits to the observed flux distribution could be obtained with an optically thick dust shell having a mass of 0.10-0.15 M(circle dot), corresponding to a total dust + gas mass in excess of 10 M(circle dot), suggesting a massive M supergiant or luminous blue variable precursor to this self-obscured object.

Original languageEnglish
Pages (from-to)L113-L116
Number of pages4
JournalAstrophysical Journal
Volume627
Issue number2
Publication statusPublished - 10-Jul-2005

Keywords

  • dust, extinction
  • galaxies : individual (NGC 6946)
  • supernovae : general
  • supernovae : individual (SN 2002hh)
  • BLUE VARIABLE CANDIDATE
  • INTERSTELLAR GRAINS
  • INFRARED ECHO
  • COLD DUST
  • GALAXIES
  • SN-1987A
  • EMISSION
  • EJECTA
  • SPECTROPHOTOMETRY
  • CASSIOPEIA

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