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The ultraviolet spectrum of AG Draconis

Published online by Cambridge University Press:  12 April 2016

A. Altamore ,
G.B. Baratta ,
A. Cassatella ,
A. Giangrande ,
D. Ponz ,
O. Ricciardi  and
R. Viotti
A. Altamore
Affiliation:
Osservatorio Astronomico e Università di Roma, Italy
G.B. Baratta
Affiliation:
Osservatorio Astronomico e Università di Roma, Italy
A. Cassatella
Affiliation:
Astronomy Division ESTEC, Villafranca, Spain
A. Giangrande
Affiliation:
Istituto Astrofisica Spaziale (CNR), Frascati, Italy
D. Ponz
Affiliation:
Astronomy Division ESTEC, Villafranca, Spain
O. Ricciardi
Affiliation:
Istituto Astrofisica Spaziale (CNR), Frascati, Italy
R. Viotti
Affiliation:
Istituto Astrofisica Spaziale (CNR), Frascati, Italy

Extract

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The high resolution ultraviolet spectrum of AG Dra was observed with IUE in April and August 1981 at phases 0.50 and O.69 according to the Meinunger (1979, Inf. Bull. Var. Stars No.1611) U-light curve. The UV spectrum of the star appears rather different from that of the other classical symbiotic stars. The low resolution IUE spectrum of AG Dra shown in figure 1. The continuum is rather strong with respect to the emission lines and detectable at high resolution. Many intense interstellar lines are present, in spite of the low reddening of the star (E(B-V)=0.06, according to the depth of the 2200A interstellar band).

Type
Session II – Discussion on Individual Stars
Information
International Astronomical Union Colloquium , Volume 70: The Nature of Symbiotic Stars , 1982 , pp. 183 - 184
Copyright
Copyright © Reidel 1982