Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
Pulkovo compilation of radial velocities for 35495 stars in a common system. Not Available
| 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.
| UBVRI photometry of stars useful for checking equipment orientation stability Several sets of stars have been measured, equally spaced around the skyin right ascension, over a range in declination from -75 deg to +30 deg.The goal was to obtain a number of well-observed stars with qualityinternally consistent magnitudes and color indices. The stars wereneeded to check orientation effects of photometric equipment.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
Costellazione: | Fenice |
Ascensione retta: | 23h36m34.04s |
Declinazione: | -44°53'34.2" |
Magnitudine apparente: | 6.916 |
Distanza: | 85.106 parsec |
Moto proprio RA: | 93.2 |
Moto proprio Dec: | -23.9 |
B-T magnitude: | 7.143 |
V-T magnitude: | 6.935 |
Cataloghi e designazioni:
|