Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
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.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
| Costellazione: | Regolo |
| Ascensione retta: | 16h10m18.97s |
| Declinazione: | -43°39'23.7" |
| Magnitudine apparente: | 8.376 |
| Distanza: | 186.916 parsec |
| Moto proprio RA: | 14.8 |
| Moto proprio Dec: | -9 |
| B-T magnitude: | 9.747 |
| V-T magnitude: | 8.49 |
Cataloghi e designazioni:
|
