Contingut
Imatges
Carregar la teva Imatge
DSS Images Other Images
Articles Relacionats
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.
| A finding list of early-type stars near the south galactic pole.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971AJ.....76..338S&db_key=AST
|
Enviar un nou article
Enllaços Relacionats
- - No s'ha trobat enllaços -
Enviar un nou enllaç
Membre dels grups següents:
|
Dades d'Observació i Astrometria
| Constel·lació: | Sculptor |
| Ascensió Recta: | 23h45m52.73s |
| Declinació: | -32°55'37.8" |
| Magnitud Aparent: | 8.183 |
| Distancia: | 325.733 parsecs |
| Moviment propi RA: | 3.9 |
| Moviment propi Dec: | 2.8 |
| B-T magnitude: | 8.405 |
| V-T magnitude: | 8.202 |
Catàlegs i designacions:
|
