论文标题
IRAS Z02229+6208 IR源系统的详细光谱GSCB GSC 04050 $ -02366的详细光谱
Detailed spectroscopy of post-AGB supergiant GSC 04050$-$02366 in IRAS Z02229+6208 IR source system
论文作者
论文摘要
在冷后AGB超级GSC 04050 $ - $ 02366的光谱中，使用6米BTA望远镜获得，其光谱分辨率为r $ \ ge $ $ \ ge $ 60000在2019年的任意日期$ 2021，$ 2021，radial velocity差异可变性。基于众多吸收的位置测量值的HELIPENTRIC VR的日期差异为$δ$ vr $ \ $ \ $ 1.4 km/s的标准偏差约为VR = 24.75 km/s的平均值，这可能会使大气中的低振幅脉动消失。恒星的光谱纯粹是吸收类型，没有明显的排放。发现了大多数吸收的强度变异性和C $ _2 $分子的天鹅带。在某些观察日期，观察到H $α$轮廓的轻微不对称性。 H $α$吸收核心的位置在27.3 $÷$ 30.6 km/s之间变化。发现分解成强烈低兴奋的吸收（YII，ZRII，BAII，LAII，CEII，NDII）的两个组成部分（或不对称）。长波长成分的位置与其他光球吸收的位置一致，这证实了其在恒星大气中的形成。短波组件的位置接近天鹅带的旋转特征的位置，这表明其在速度大约vexp = 16 km/s的折叠式包膜中形成。
In the optical spectra of the cold post-AGB supergiant GSC 04050$-$02366, obtained with the 6-meter BTA telescope with a spectral resolution of R$\ge$60000 on arbitrary dates over 2019$÷$2021, a radial velocity variability is found. Heliocentric Vr based on the positional measurements of numerous absorptions varies from date to date with a standard deviation of $Δ$Vr$\approx$1.4 km/s about the average value of Vr=24.75 km/s, which may stem out of the low-amplitude pulsations in the atmosphere. The spectra of the star are purely absorption type, there are no obvious emissions. Intensity variability of most of absorptions and Swan bands of the C$_2$ molecule was discovered. A slight asymmetry of the H$α$ profile is observed at some observation dates. The position of H$α$ absorption core varies within 27.3$÷$30.6 km/s. Splitting into two components (or asymmetry) of strong low-excitation absorptions (YII, ZrII, BaII, LaII, CeII, NdII) was found. The position of the long-wavelength component coincides with the position of other photospheric absorptions, which confirms its formation in the atmosphere of the star. The position of the shortwave component is close to the position of the rotational features of Swan bands, which indicates its formation in the circumstellar envelope expanding at a velocity of about Vexp=16 km/s.
