Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.216..291s&link_type=abstract
Astrophysics and Space Science, vol. 216, no. 1-2, p. 291-295
Astronomy and Astrophysics
Astrophysics
1
Hot Stars, Nebulae, Stellar Envelopes, Stellar Luminosity, Stellar Spectra, Supergiant Stars, Variable Stars, Astronomical Spectroscopy, Emission Spectra, H Alpha Line, Hertzsprung-Russell Diagram, Nitrogen, Stellar Mass Ejection
Scientific paper
High spatial and spectral resolution observations of the ring nebula surrounding the Luminous Blue Variables (LBV) candidate He 3-519 are presented. The data were obtained at the Anglo-Australian Telescope (AAT) with the University College London (UCL) echelle spectrograph and cover the H-alpha and (N II) emission lines for two slit positions. The nebular motions are clearly resolved and have a total velocity spread of -40 to +100 km/s. The shell shows some deviations from spherical symmetry but overall is expanding at 61 km/s and has an ionized mass of approximately 2 solar mass. The nebular parameters are found to be similar to those of the AG Car nebula, suggesting that it resulted from a bulk ejection of material approximately 2 x 104 yr ago.
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