Садржај
Слике
Уплоадјуј своје слике
DSS Images Other Images
Везани чланци
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.
|
Додај нови чланак
Линкови у сродству са темом
Додај нови линк
Чланови следећих група \:
|
Посматрања и Астрометриски подаци
| Сазвежђа: | Јужни троугао |
| Ректацензија: | 16h47m30.29s |
| Deклинација: | -66°04'21.4" |
| Apparent магнитуда: | 8.347 |
| Даљина: | 357.143 parsecs |
| Proper motion RA: | 13.5 |
| Proper motion Dec: | -6.1 |
| B-T magnitude: | 9.414 |
| V-T magnitude: | 8.436 |
Каталог и designations:
|
INHABITED SKY
