The dynamics of the extraordinary mass-loss bubble G2.4 + 1.4

Details The dynamics of the extraordinary mass-loss bubble G2.4 + 1.4 The dynamics of the extraordinary mass-loss bubble G2.4 + 1.4

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359..419d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 359, Aug. 20, 1990, p. 419-426.

Astronomy and Astrophysics

Astrophysics

19

Bubbles, Nebulae, Stellar Mass Ejection, Wolf-Rayet Stars, Emission Spectra, High Resolution, Interstellar Extinction, Photoionization, Stellar Envelopes

Scientific paper

High-resolution forbidden O III observations of the nebula G2.4 + 1.4, a highly reddened, photoionized, mass-loss bubble of very high excitation powered by the most extreme oxygen sequence Wolf-Rayet star known, are presented. These data and the morphology of the nebula prove that the filamentary shell of G2.4 + 1.4 is roughly hemispherical and is blowing out from the near surface of a dense cloud located to the southeast. This emits mainly by photoionization by the central star. Expansion down the strong density gradient has encouraged the development of a Rayleigh-Taylor instability which gives rise to the characteristically scalloped appearance of this nebula. The energy input required to produce this structure is estimated and compared with the properties of the central star.

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