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HD 148191


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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.

The calibration of the Stromgren photometric system for A, F and early G supergiants. I - The observational data
An empirical calibration of the Stromgren uvby-beta photometric systemfor the A, F, and early G supergiants is being derived. This paperexplains the observational program and the photometric reductiontechniques used and presents a catalog of new Stromgren photometry forover 600 A, F, and G supergiants.

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观测天体数据

星座:矩尺座
右阿森松:16h29m31.14s
赤纬:-56°47'55.6"
视星:8.441
距离:487.805 天文距离
右阿森松适当运动:-2.1
赤纬适当运动:-1.9
B-T magnitude:9.742
V-T magnitude:8.549

目录:
适当名称   (Edit)
HD 1989HD 148191
TYCHO-2 2000TYC 8720-1891-1
USNO-A2.0USNO-A2 0300-28601664
HIPHIP 80772

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