Contingut
Imatges
Carregar la teva Imatge
DSS Images Other Images
Articles Relacionats
The VELA star cloud. II - Early-type stars and long-period Cepheids near the VELA pulsar
Intermediate band, H-beta and RI observations of some 200 stars andthree Cepheids in a small region centered on the Vela pulsar have shownthe presence of additional members of the Vela sheet (450 pc), as wellas two more distant associations, Vel OB1 (800 pc) and Vel OB2 (1800pc). Vel OB2, which may be only some 5-million yr old, probably containsSW (23.4 d), RZ (20.4 d), and SX (19.6 d) Vel. All three Cepheids havean overabundance of metals, relative to the sun, if the photometricindices are abundance dependent only. The luminosities of the threeCepheids, plus AH Vel in the Vela sheet and two other southern Cepheidsdiscussed previously, all based on an independent photometric luminositycalibration, do not indicate a need for a major revision of the zeropoint of the period-luminosity relation.
|
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: | Vela |
| Ascensió Recta: | 08h29m55.68s |
| Declinació: | -45°11'05.2" |
| Magnitud Aparent: | 8.634 |
| Distancia: | 87.184 parsecs |
| Moviment propi RA: | 18.1 |
| Moviment propi Dec: | 62.3 |
| B-T magnitude: | 9.339 |
| V-T magnitude: | 8.693 |
Catàlegs i designacions:
|
