SPECTROSCOPIC OBSERVATIONS OF SOME D-TYPE SYMBIOTIC STARS

Citation
A. Gutierrezmoreno et H. Moreno, SPECTROSCOPIC OBSERVATIONS OF SOME D-TYPE SYMBIOTIC STARS, Publications of the Astronomical Society of the Pacific, 108(729), 1996, pp. 972-979
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
0004-6280 → ACNP
Volume
108
Issue
729
Year of publication
1996
Pages
972 - 979
Database
ISI
SICI code
0004-6280(1996)108:729<972:SOOSDS>2.0.ZU;2-0
Abstract
Observations of one D'- and five D-type symbiotic stars are presented: AS 201, He 2-106, He 2-127, He 2-171, AS 210, and Hen 1591. Several p arameters are obtained for each object: interstellar reddening as dete rmined from the Balmer decrement, considering optical depth effects; e lectron densities, estimated for adopted electron temperatures of 12,0 00 and 15,000 K; and helium abundances, also determined considering op tical depth effects, Circumstellar contributions to reddening are esti mated, The positions and motions of these objects in a diagnostic diag ram presented by the authors are shown and discussed.