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Spectroscopy and Kinematics of the High-Latitude UX Ori Type Star V1117 Her
Astrophysics ( IF 0.6 ) Pub Date : 2020-11-17 , DOI: 10.1007/s10511-020-09652-1
I. S. Potravnov , M. V. Eselevich

Results from a study of low resolution spectra and kinematics of the star V1117 Her located at a high galactic latitude b = +33°.8 are presented. It is shown that this star has A7 IV photospheric class, luminosity L ≈ 26 Lʘ, and spectral signs of accretion activity. This confirms its previous classification as a young Ae Herbig star with photometric UX Ori type variability. In addition, the parallax of V1117 Her in the GAIA DR2 catalog corresponds to a distance of D ≈ 1.4 kpc to it, which represents a height Z ≈ 800 pc of the star above the galactic plane. Here the kinetics of the star indicates its more probable formation in situ, outside the plane of the young disk. A possible scenario for the formation of V1117 Her is discussed briefly.

中文翻译:

高纬度UX Ori型星V1117 Her的光谱和运动学

介绍了对位于高银纬 b = +33°.8 的恒星 V1117 Her 的低分辨率光谱和运动学的研究结果。表明这颗恒星的光球等级为 A7 IV,光度 L ≈ 26 Lʘ,吸积活动的光谱标志。这证实了它之前被归类为具有光度 UX Ori 类型可变性的年轻 Ae Herbig 恒星。此外,GAIA DR2目录中V1117 Her的视差对应于它的距离D≈1.4kpc,这代表了银河平面上方恒星的高度Z≈800pc。在这里,恒星的动力学表明它更有可能在年轻盘面之外的原位形成。简要讨论了 V1117 Her 形成的可能情况。
更新日期:2020-11-17
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