The AG Carinae nebula revisited

Details The AG Carinae nebula revisited The AG Carinae nebula revisited

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...266..360d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 266, no. 1, p. 360-364.

Physics

Optics

19

Nebulae, Stellar Envelopes, Stellar Evolution, Stellar Mass Ejection, Abundance, Cassegrain Optics, Emission Spectra, H Alpha Line, Stellar Composition, Stellar Models

Scientific paper

We report new Cassegrain observation of the AG Car nebula, as well as long slit Coude spectra and imagery at H-alpha. From our data we derive an expansion velocity of 66 km/s for the nebula and a minimal mass of 2.7 solar mass. Long slit data show H-alpha emission up to 45 arcsec from the star, indicating a diffuse nebulosity surrounding the main nebula. We also find that nitrogen is overabundant by one order of magnitude and oxygen is deficient at least by a factor of 6 in the nebula. These results are consistent with the surface abundances of a 60 solar mass star aged at 3.7 x 10 exp 6 yr just beginning its LBV phase.

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