* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Abell 70


L

Posts: 131433
Date:
Abell 70
Permalink  
 


Title: A barium-rich binary central star in Abell 70
Authors: Henri M. J. Boffin, B. Miszalski, D. J. Frew, A. Acker, J. Köppen, A. F. J. Moffat, Q. A. Parker

We have found the central star of Abell 70 (PN G038.1-25.4, hereafter A 70) to be a binary consisting of a G8 IV-V secondary and a hot white dwarf. The secondary shows enhanced Ba II and Sr II features, firmly classifying it as a barium star. The nebula is found to have Type-I chemical abundances with helium and nitrogen enrichment, which combined with future abundance studies of the central star, will establish A 70 as a unique laboratory for studying s-process AGB nucleosynthesis.

Read more  (293kb, PDF)



__________________
Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard