Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...402..693p&link_type=abstract
Astronomy and Astrophysics, v.402, p.693-700 (2003)
Astronomy and Astrophysics
Astrophysics
6
Stars: Emission-Line, Be, Stars: Agb And Post-Agb, Stars: Individual: Ss73 56, Hen 2-79
Scientific paper
We report new spectroscopic observations of two proto planetary-nebulae candidates: SS73 56 and Hen 2-79 between 3200 Å, and 8000 Å. From the measurements of several forbidden and permitted emission lines of single ionized iron, we derived the color excess and the excitation temperature. We discuss the nature of the two objects based on data obtained. The iron spectrum closely resembles eta Car but the absence or the weakness of [N II]5754 Å, compared to eta Car reduces the possibility of being a LBV object. We also compare the two objects with the peculiar emission-line object SS73 11 that was recently analyzed by us.
Based on observations made with the 1.52 m telescope at the European Southern Observatory (La Silla, Chile) under the agreement with the Observatório Nacional, Brazil.
Codina Landaberry Sayd Jose
de Araújo Francisco Xavier
Pereira Claudio Bastos
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