Coupled long-term photometric and V/R variations in Be stars: evidence for prograde global one-armed disk oscillations
| dc.contributor.author | Mennickent, RE | |
| dc.contributor.author | Sterken, C | |
| dc.contributor.author | Vogt, N | |
| dc.date.accessioned | 2025-01-21T01:33:06Z | |
| dc.date.available | 2025-01-21T01:33:06Z | |
| dc.date.issued | 1997 | |
| dc.description.abstract | We review theoretical work on global oscillations of Be star disks and summarize possible observational tests. In addition, we analyze existing records on photometric data and V/R ratio for a sample of 6 V/R variable Be stars. Five stars showed coupled long-term photometric-V/R variations. In all cases the photometric extrema coincided with times of V = R transits, the fainter state being followed by a V < R phase. V 1294 Aql, 48 Lib and MXPup showed anticorrelated c(1) and b - y colors during light cycles, the stars being redder in b - y when brightest. 48 Lib shows a complex color behaviour, exhibiting two minima during a V/R cycle and a pronounced b - y drop just at maximum light. In addition, this star shows enigmatic, non-periodic, eclipse-like features in its light curve. In general, the V/R-photometric observations can bi grouped in three main groups, depending on the degree of correlation exhibited by the V/R ratio and the photometric fluxes and the rate of change of the u flux. These groups are compatible with prograde global disk oscillations observed under different system inclinations. | |
| dc.fuente.origen | WOS | |
| dc.identifier.issn | 0004-6361 | |
| dc.identifier.uri | https://repositorio.uc.cl/handle/11534/97371 | |
| dc.identifier.wosid | WOS:A1997YC42100038 | |
| dc.issue.numero | 3 | |
| dc.language.iso | en | |
| dc.pagina.final | 1175 | |
| dc.pagina.inicio | 1167 | |
| dc.revista | Astronomy & astrophysics | |
| dc.rights | acceso restringido | |
| dc.subject | stars: emission-line, Be | |
| dc.subject | stars: individual: V 923 Aql | |
| dc.subject | V 1294 Aql | |
| dc.subject | gamma Cas | |
| dc.subject | 48 Lib | |
| dc.subject | MX Pup | |
| dc.subject | zeta Tau | |
| dc.title | Coupled long-term photometric and V/R variations in Be stars: evidence for prograde global one-armed disk oscillations | |
| dc.type | artículo | |
| dc.volumen | 326 | |
| sipa.index | WOS | |
| sipa.trazabilidad | WOS;2025-01-12 |