Other
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....120.3098p&link_type=abstract
The Astronomical Journal, Volume 120, Issue 6, pp. 3098-3101.
Other
7
Galaxies: Magellanic Clouds, Stars: Agb And Post-Agb, Stars: Fundamental Parameters, Stars: Population Ii, Stars: Variables: Other
Scientific paper
We present the first spectra of an RV Tauri star in the Large Magellanic Cloud. MACHO* 04:55:43.2-67:51:10 is a recently identified RV Tauri variable with a double period of 112.448 days. Three low-resolution (210 Å mm-1, or 7 Å resolution) spectrograms obtained of this star show strong C2 bands with a pronounced phase dependence, their strength being greatest at minimum light. The overall spectrum of MACHO*04:55:43.2-67:51:10 is similar to those observed in proto-planetary nebulae. This unusual star therefore combines the main spectral anomaly of the proto-planetary nebulae with RV Tauri-like photometric variability. The occurrence of a luminous, carbon-rich RV Tauri-like star may be explained by assuming that it is a star of 1-2 solar masses that has evolved through the M-S-C transition on the extended asymptotic giant branch (AGB) and is now moving to the blue in the pre-planetary nebula stage. This star may therefore represent a link between these two types of star and strengthen the post-AGB interpretation of RV Tauri stars.
Evans Tom Lloyd
Pollard Karen R.
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