Tartalom
Képek
Kép feltöltése
DSS Images Other Images
Kapcsolódó cikkek
The influence of the envelope in the variations of transitory type Be stars
The contribution of the stellar envelope to variations oftransitory-type Be stars, which are alternately of types B and Be, isinvestigated. The Rojas-Herman classification is applied to thequantification of long-term stellar variation for a sample of Be starsbrighter than magnitude 7, and compared with the spectral properties ofthese stars. A relation is derived between the equivalent widths of theH-alpha and H-beta lines and the stellar U-B index. The U-B index isthen calibrated as a function of the Balmer discontinuity in order toseparate the contributions of the star and its envelope to the emission.The separate U-B indices derived for the star, which are characterizedby long-term variations, and the envelope, which is sensitive toshort-term variations, are observed to be additive, implying that theobserved flux is a convolution of the fluxes emitted by the star and itsenvelope.
|
Új cikk hozzáadása
Kapcsolódó hivatkozások
- - (nincs kapcsolódó hivatkozás) -
Új link hozzáadása
Besorolás csoportokba:
|
Pozíciós és asztrometriai adatok
| Csillagkép: | Halak |
| Rektaszcenzió: | 23h03m46.20s |
| Deklináció: | +07°20'04.1" |
| Vizuális fényesség: | 8.796 |
| RA sajátmozgás: | -12.2 |
| Dec sajátmozgás: | 0.8 |
| B-T magnitude: | 9.395 |
| V-T magnitude: | 8.846 |
Katalógusok és elnevezések:
|
