Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
The early F-type stars - Refined classification, confrontation with Stromgren photometry, and the effects of rotation
The classification for early F-type stars in the MK spectralclassification system presented by Gray and Garrison (1987) is refined.The effect of rotation on spectral classification and ubvy-betaphotometry of early F-type stars is examined. It is found that theclassical luminosity criterion, the 4417 A/4481 A ratio givesinconsistent results. It is shown that most of the stars in the DeltaDelphini class of metallic-line stars are either normal or areindistinguishable from proto-Am stars. It is suggested that thedesignation Delta Delphini should be dropped. The classifications arecompared with Stromgren photometry. The effects of rotation on thedelta-c1 index in the early-F field dwarfs is demonstrated.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
| Costellazione: | Pesce Australe |
| Ascensione retta: | 22h52m10.75s |
| Declinazione: | -34°38'03.1" |
| Magnitudine apparente: | 7.837 |
| Distanza: | 221.729 parsec |
| Moto proprio RA: | 21.1 |
| Moto proprio Dec: | -10.9 |
| B-T magnitude: | 8.19 |
| V-T magnitude: | 7.867 |
Cataloghi e designazioni:
|
