Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation
The MK spectral classification for late A-type stars is refined and theeffects of rotation of spectral classification and uvby(beta) photometryfor these stars are examined. It is found that, for A3 stars, the4417/4481 A wavelength ratio produces results that are inconsistent withthe Stark broadening of the H lines. It is suggested that this ratio isnot useful as a luminosity criterion at any spectral type.Self-consistent sequences of narrow- and broadline standards areestablished. The results of the refined classification system arecompared with Stromgren photometry, showing a set of low-v sin i A-typestars with anomalously large delta(c1) indices for theirluminosity types. It is proposed that these stars are rapid rotatorsseen at fairly low inclination angles.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
| Costellazione: | Fenice |
| Ascensione retta: | 23h59m09.67s |
| Declinazione: | -42°14'12.8" |
| Magnitudine apparente: | 6.778 |
| Distanza: | 87.26 parsec |
| Moto proprio RA: | 40.2 |
| Moto proprio Dec: | 24.9 |
| B-T magnitude: | 7.027 |
| V-T magnitude: | 6.799 |
Cataloghi e designazioni:
|
INHABITED SKY
