I. Usenko, A. S. Miroshnichenko, S. Danford, D. G. Turner, D. J. Majaess, D. D. Balam
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引用次数: 0
摘要
我们展示了对2016-2023年获得的18颗北极星场A-G V恒星的28幅光谱的分析结果。从盖亚DR3星表中推导出的径向速度和Teff以及距离和红度使我们能够计算出恒星的半径，并将其与MS恒星的校准关系 "光谱型-光度 "进行比较。结果发现，有 9 颗恒星的半径和距离比光度测定的结果高估了。因此，DR3 的距离是不可靠的，应该重新研究。根据我们为这些恒星提供的数据和它们的测光距离，15 个天体属于一个可能的古老疏散星团，该星团目前溶解在距离 ∼ 70-110 pc 的北极星场中，两个天体属于厚圆盘，一个属于距离 130 pc 的另一个可能的星团。
SPECTROSCOPIC INVESTIGATIONS OF POLARIS FIELD STARS
We present the results of an analysis of 28 spectra of 18 Polaris field A–G V stars obtained in 2016–2023. Derived radial velocities and Teff along with distances and reddenings from the Gaia DR3 catalog allowed us to calculate radii of the stars and compare them with calibration relationships “Spectral type – Luminosity” for MS stars. As a result, radii and distances for 9 stars were found overestimated compared to those determined photometrically. Therefore, the DR3 distances are unreliable and should be revisited. According to our data for these stars and their photometric distances, 15 objects belong to a possible old open cluster that is currently dissolved in the Polaris field at a distance ∼70–110pc, while two objects belong to the thick disk, and one belongs to a possible another star group located at a distance of 130 pc.
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