| Issue |
A&A
Volume 479, Number 2, February IV 2008
|
|
|---|---|---|
| Page(s) | 529 - 531 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20066873 | |
| Published online | 04 December 2007 | |
Symbiotic star LL Cassiopeiae*
Fessenkov Astrophysical Institute, Observatory 050020 Almaty, Kazakhstan e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
5
December
2006
Accepted:
27
November
2007
Abstract
Aims.Study of the spectral and photometric properties of the symbiotic star LL Cas.
Methods.Spectroscopy and photometry.
Results.Spectral and photometric observations of LL Cas were performed in
1986–2006. LL Cas displays a late-type spectrum with TiO
absorbtion bands and emission lines of 
,
[
], 
and 
. Significant
fluctuations of relative intensities of [], 5007 Å
and , 4686 Å are revealed. They reflect the changes
of the field of radiation of the ionizing source. Wavelike
variations of the star's light with amplitudes of about 2m–3
5 are found in the B, V and R bands. They can be ascribed to
the pulsations of the cool giant.
Key words: stars: binaries: symbiotic
Tables 1–3 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/479/529
© ESO, 2008
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