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HD 144947


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Ca II H and K Photometry on the UVBY System. III. The Metallicity Calibration for the Red Giants
New photometry on the uvby Ca system is presented for over 300 stars.When combined with previous data, the sample is used to calibrate themetallicity dependence of the hk index for cooler, evolved stars. Themetallicity scale is based upon the standardized merger of spectroscopicabundances from 38 studies since 1983, providing an overlap of 122evolved stars with the photometric catalog. The hk index producesreliable abundances for stars in the [Fe/H] range from -0.8 to -3.4,losing sensitivity among cooler stars due to saturation effects athigher [Fe/H], as expected.

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观测天体数据

星座:矩尺座
右阿森松:16h10m18.97s
赤纬:-43°39'23.7"
视星:8.376
距离:186.916 天文距离
右阿森松适当运动:14.8
赤纬适当运动:-9
B-T magnitude:9.747
V-T magnitude:8.49

目录:
适当名称   (Edit)
HD 1989HD 144947
TYCHO-2 2000TYC 7864-935-1
USNO-A2.0USNO-A2 0450-23328627
HIPHIP 79243

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