Issue |
Astron. Astrophys. Suppl. Ser.
Volume 119, Number 1, October I 1996
|
|
---|---|---|
Page(s) | 61 - 90 | |
DOI | https://doi.org/10.1051/aas:1996228 | |
Published online | 15 October 1996 |
Raman scattering in symbiotic stars. I. Spectropolarimetric observations
1
School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, Scotland
2
Dept. of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
Corresponding author: Send offprint request to: T.J. Harries, e-mail: tjh@st-and.ac.uk
Received:
16
October
1995
Accepted:
9
December
1995
We present high signal-to-noise, high-dispersion linear
spectro polarimetry of the Raman-scattered 6825,
7082 Å emission lines in 27 southern-hemisphere symbiotic
systems. We give continuum polarization measurements for all the
targets (together with estimates of the foreground interstellar
polarization), and new estimates of the red-giant spectral types in 23
systems. We confirm continuum-polarization variability in five out of
eight systems with previous high-quality photo polarimetry. The
Raman lines are fully resolved; although they display a wide variety
of morphologies, both the intensity and polarization profiles appear
basically to be triple-peaked. Spectra of five systems observed in
both 1992 and 1994 show stable Raman-line intensity profiles, but with
significant variations in the polarization structure.
Key words: stars / stars: binaries: symbiotic / stars: late-type / stars: mass-loss / polarization
© European Southern Observatory (ESO), 1996