High spatial resolution observations of S 106 from lambda = 0.6 micron to lambda = 1.3 CM - A wind model for the bipolar nebula

Details High spatial resolution observations of S 106 from lambda = 0.6 micron to lambda = 1.3 CM - A wind model for the bipolar nebula High spatial resolution observations of S 106 from lambda = 0.6 micron to lambda = 1.3 CM - A wind model for the bipolar nebula

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135..261f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 2, June 1984, p. 261-280.

Astronomy and Astrophysics

Astrophysics

77

Early Stars, Nebulae, Stellar Models, Stellar Winds, H Alpha Line, High Resolution, Infrared Spectra, Radio Spectra, Spatial Resolution, Stellar Evolution, Stellar Mass Ejection, Stellar Spectrophotometry, Visible Spectrum

Scientific paper

The authors present new observations of the bipolar nebula S106. A VLA map at λ1.3 cm with 2arcsec.3 resolution reveals the detailed structure of the radio lobes and the detection of radio emission from the unresolved exciting star. Hα photometry and CCD images in the near IR continuum and in the [S III] line at λ9532 Å allow the construction of a detailed extinction map. Infrared spectrophotometry (2 - 4 μm and 8 - 14 μm) provides information on line emission from the central star and from the lobes as well as on the unidentified features at λ3.3, 3.4, and 11.3 μm. The central point source is interpreted in terms of a mass loosing early type star. The presence of the equatorial gap responsible for the bipolar structure of the ionized gas is explained in terms of a slight asymmetry in the density distribution of the mass loss envelope. The morphology and model calculations suggest that in the lobes both, ionized gas and warm dust, are concentrated on a cylindrical surface, while a much lower density prevails inside.

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