Contingut
Imatges
Carregar la teva Imatge
DSS Images Other Images
Articles Relacionats
Light variations of massive stars (Alpha Cygni variables). IX
High-precision VBLUW photometry of 22 highly luminous OBA-type stars, 13of which are Alpha Cygni variables and two of which are variable only incolor, is presented. It is suggested that sigma (V-B) increases fasterthan sigma (B-L) with later spectral types due to the absence ofstochastic metal line strength variations in the V band. It is assumedthat short-time-scale stellar spot activity is present, or thattemperature and density waves move through the atmospheres with the sametime scales, producing these line strength variations independent of thecontinuum variations. The possibility of differentiating stars which lieclose to each other in the HR diagram but have different evolutionaryhistories (and thus different metal abundances) with the aid of themaximum light amplitude/sigma (V-B) diagram is considered.
|
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: | Tucana |
| Ascensió Recta: | 01h11m18.75s |
| Declinació: | -59°12'00.3" |
| Magnitud Aparent: | 8.394 |
| Distancia: | 307.692 parsecs |
| Moviment propi RA: | 21.3 |
| Moviment propi Dec: | 7.6 |
| B-T magnitude: | 9.536 |
| V-T magnitude: | 8.489 |
Catàlegs i designacions:
|
