Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Baltic Astronomy, vol. 14, XXXXXX, 2005. NON-LTE METAL ABUNDANCES IN V652 HER AND HD 144941
 

Summary: Baltic Astronomy, vol. 14, XXX­XXX, 2005.
NON-LTE METAL ABUNDANCES IN V652 HER AND HD 144941
N. Przybilla1
M. F. Nieva1,2
U. Heber1
and C.S. Jeffery3
1
Dr. Remeis-Sternwarte Bamberg, Sternwartstr. 7, D-96049 Bamberg, Germany
2
Observat´orio Nacional, R. Gal. Jos´e Cristino 77, 20921-400, S~ao Crist´ov~ao,
Rio de Janeiro, RJ, Brasil
3
Armagh Observatory, College Hill, Armagh BT61 9DG, Northern Ireland
Received 2005 July 31
Abstract. Two evolutionary scenarios are proposed for the formation of ex-
treme helium stars: a post-AGB star suffering from a late thermal pulse, or the
merger of two white dwarfs. An identification of the evolutionary channel for
individual objects has to rely on surface abundances. We present preliminary
results from a non-LTE analysis of CNO, Mg and S for two unique objects,
V 652Her and HD 144941. Non-LTE abundance corrections for these elements

  

Source: Armagh Observatory

 

Collections: Physics