Observed Features of a Two-Phase Stellar Wind from WR 136 in the Vicinity of NGC 6888

Details Observed Features of a Two-Phase Stellar Wind from WR 136 in the Vicinity of NGC 6888 Observed Features of a Two-Phase Stellar Wind from WR 136 in the Vicinity of NGC 6888

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004arep...48..638b&link_type=abstract

Astronomy Reports, vol. 48, Issue 8, p.638-648

Astronomy and Astrophysics

Astronomy

Scientific paper

A number of features are detected outside the nebula NGC 6888, within 1.2° (30 pc) of the star WR 136, which can be explained in a two-phase stellar-wind model. These include regions with fine filamentary gas structure that do not contain sources of stellar wind, extended radial “streams,” ultra-compact HII regions with high-velocity gas motions, and high-velocity gas motions outside the envelope of NGC 6888. The two-phase wind consists of a rarefied component and dense compact condensations, or “bullets.” The bullets generate cylindrical shocks in the interstellar gas, resulting in the presence of high-velocity gas up 20 30 pc from the star, outside the cavity formed by the rarified component of the wind.

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