CAOSP abstracts, Volume: 50, No.: 3, year: 2020

Author(s): Andreoli, V.; Munari, U.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 50, no. 3, p. 672-680.
Date: 7/2020
Title: LAMOST J202629.80+423652.0 is not a symbiotic star
Keyword(s): binaries : symbiotic, surveys : LAMOST
Pages: 672 -- 680
DOI: https://doi.org/10.31577/caosp.2020.50.3.672
NASA ADS Abstract Service: 2020CoSka..50..672A
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

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 E_B-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.