The outer shock of the oxygen-rich supernova remnant G292.0+1.8: Evidence for the interaction with the stellar winds from its massive progenitor

Jae Joon Lee, Sangwook Park, John P. Hughes, Patrick O. Slane, B. M. Gaensler, Parviz Ghavamian, David N. Burrows

Research output: Contribution to journalArticle

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Abstract

We study the outer-shock structure of the oxygen-rich supernova remnant G292.0+1.8 using a deep observation with the Chandra X-ray Observatory. We measure radial variations of the electron temperature and emission measure that we identify as the outer shock propagating into a medium with a radially decreasing density profile. The inferred ambient density structure is consistent with models for the circumstellar wind of a massive progenitor star rather than for a uniform interstellar medium. The estimated wind density (n H = 0.1-0.3 cm-3) at the current outer radius ( ∼ 7.7 pc) of the remnant is consistent with a slow wind from a red supergiant (RSG) star. The total mass of the wind is estimated to be 15-40 M (depending on the estimated density range), assuming that the wind extended down to near the surface of the progenitor. The overall kinematics of G292.0+1.8 are consistent with the remnant expanding through the RSG wind.

Original languageEnglish (US)
Pages (from-to)861-869
Number of pages9
JournalAstrophysical Journal
Volume711
Issue number2
DOIs
StatePublished - Jan 1 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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