LAMOST J202629.80+423652.0 is not a symbiotic star
Abstract
LAMOST J202629.80+423652.0 has been recently classified as a new symbiotic star containing a long-period Mira, surrounded by dust (D-type) and displaying in the optical spectra high ionization emission lines, including the Raman-scattered OVI at 6825 Å. We have observed LAMOST J202629.80+423652.0 photometrically in the BVRI bands and spectroscopically over the 3500-8000 Å range. We have found it to be a normal G8 IV sub-giant star, deprived of any emission line in its spectrum, and reddened by EB-V=0.35 mag. Combining our photometry with data from all-sky patrol surveys, we find LAMOST J202629.80+423652.0 to be non variable, so not pulsating as a Mira. We have compiled from existing sources its spectral energy distribution, extending well into the mid-Infrared, and found it completely dominated by the G8 IV photospheric stellar emission, without any sign of circumstellar dust. We therefore conclude that LAMOST J202629.80+423652.0 is not a symbiotic star, nor it is pulsating or been enshrouded in dust.
- Publication:
-
Contributions of the Astronomical Observatory Skalnate Pleso
- Pub Date:
- July 2020
- DOI:
- 10.31577/caosp.2020.50.3.672
- arXiv:
- arXiv:2004.10407
- Bibcode:
- 2020CoSka..50..672A
- Keywords:
-
- binaries : symbiotic;
- surveys : LAMOST;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Published in Contrib. Astron. Obs. Skalnate Pleso 50, 672-680 (2020)