Open AccessLow-resolution Optical Spectroscopy of Recently Discovered Accreting-only Symbiotic Star THA 15–31
Author(s) -
J. Merc,
S. Charbonnel,
O. Garde,
Pascal Le Dû,
Lionel Mulato,
Thomas Petit,
R. Gális
Publication year - 2022
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/ac5ea8
Subject(s) - symbiotic star , astrophysics , physics , emission spectrum , spectroscopy , ionization , accretion (finance) , star (game theory) , resolution (logic) , accretion disc , astronomy , spectral line , ion , quantum mechanics , artificial intelligence , computer science
Recently, the discovery and characterization of a new accreting-only symbiotic star THA 15–31 was presented. Motivated by the suggestion that the optical spectrum of the star might show the emission lines with higher ionization potential in comparison with previously studied epochs, we have obtained a low-resolution spectrum of this target. The spectrum does not reveal the presence of suggested He ii emission lines. Moreover, the near-UV excess seems to be even less prominent now in comparison with the previous observations, suggesting a decrease in mass transfer and accretion rate. The search for He ii emission lines should be repeated when the accretion rate is higher.