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A Spectroscopic Study of the High-Latitude Far Evolved Star V534Lyr

机译:高纬度远景星星V534LYR的光谱研究

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We study a pulsating variable post-AGB star V534Lyr= HD172324 based on five high resolution spectra(R= 60000)obtained with the NES echelle spectrograph of the 6-meter Russian telescope(BTA)in 2010 and 2013. Using the atmosphere modeling method and the Kurucz model set, we obtained the effective temperature Teff= 10500 K, surface gravity logg= 2.5, and microturbulent velocity ξ_1=4.0 km/s. The underabundance of the iron group elements [Met/H]_⊙= -0.50 was detected. This fact in combination with high spatial velocity indicates that V534Lyr does not belong to the disk population. The radial velocity gradient in the V534 Lyr atmosphere is minimum: differential shifts of lines are close to measurement errors. The spectral class A0 lab corresponds to the distance to V534 Lyr, d ≈ 6 kpc.
机译:我们在2010年和2010年和2013年使用6米俄罗斯望远镜(BTA)的NES echelle光谱仪获得的五个高分辨率光谱(R = 60000)来研究脉动变量后AGB星形V534LYR = HD172324。使用大气建模方法和Kurucz模型设置,我们获得了有效温度Teff = 10500 k,表面重力Logg = 2.5,微旋转速度ξ_1= 4.0 km / s。检测到铁基元素[MET / H] _ = -0.50的粪便。与高空间速度结合的这一事实表明V534LYR不属于磁盘群体。 V534 Lyr气氛中的径向速度梯度最小:线路的差分偏移接近测量误差。频谱类A0 Lab对应于V534 Lyr,D≈6KPC的距离。

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