Spectral study of V565 Mon: probable FU Ori-like or chemically peculiar star  

作　　者：Hasmik Andreasyan 

机构地区：[1]Byurakan Astrophysical Observatory,NAS RA,Byurakan,Aragatzotn Prov.,0213,Armenia

出　　处：《Research in Astronomy and Astrophysics》2021年第3期128-132,共5页天文和天体物理学研究（英文版）

基　　金：supported by the RA MES State Committee of Science,in the frame of the research project number 18T-1C-329;Funding for the DPAC has been provided by national institutions,in particular the institutions participating in the Gaia Multilateral Agreement;a joint project of the University of California,Los Angeles,and the Jet Propulsion Laboratory/California Institute of Technology,funded by the National Aeronautics and Space Administration;the Pan-STARRS1 Surveys(PS1)and the PS1public science archive;which have been made possible under Grant No.NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate;the National Science Foundation Grant No.AST-1238877。

摘　　要：We present a detailed spectroscopic study of pre-main sequence star V565 Mon,which is the illuminating star of the Parsamian 17 cometary nebula.Observations were performed with the 2.6 m telescope in Byurakan Astrophysical Observatory on 2018 February 15.Radial velocities and equivalent widths of the most prominent lines of V565 Mon are presented.We build the spectral energy distribution and estimate the main parameters of the star,for example the obtained bolometric luminosity of V565 Mon is L_(V565)≈130 L_(⊙).Considering all features of V565 Mon,we come to the conclusion that this young intermediate-mass star belongs to some intermediate class between T Tau and HAeBe stars.Very unusual for a young star is the presence of strong absorption BaⅡlines in the spectrum.Possible explanations on this issue are discussed.Hence,we think that V565 Mon is a unique example,which can help to understand some open questions involved in the problem of nucleosynthesis in young stars.

关 键 词：stars:pre-main sequence stars:variables:T Tauri Herbig Ae/Be stars:individual:V565 Mon 

分 类 号：P144[天文地球—天体物理]