Open AccessStudy of variability of 2MASSJ10183905+0014078 stellar objects
Author(s) -
E. S. Romas
Publication year - 2019
Publication title -
communications of the byurakan astrophysical observatory
Language(s) - English
Resource type - Journals
ISSN - 2579-2776
DOI - 10.52526/25792776-2019.66.1-60
Subject(s) - brightness , astrophysics , luminosity , physics , star (game theory) , hertzsprung–russell diagram , stellar classification , color index , amplitude , astronomy , stellar evolution , stars , optics , galaxy
This paper presents observational data for the star 2MASSJ10183905+0014078 (UCAC4 452-048383), in which so far no brightness variability has been detected. However, photometric observations made in 2015 allowed recording are activity with an amplitude of 0.8 m for this star. The star parameters, namely magnitude and color index (V0 = 7.59, (B - V)0 = 1.19) and, therefore, the position on the Hertzsprung-Russell diagram, luminosity (L☉ = 0.1), spectral class (K7), mass (M☉ = 0.6), the spectral characteristics in the optical (Ca, Fe, Na D, H_ lines, Mg H, and TiO bands) and X-ray ranges allow us to classify the star as UVCet type object. The ash profile can be attributed to type II, with a relatively slow increase and decrease in brightness.