Contenidos
Imágenes
Subir su imagen
DSS Images Other Images
Artículos relacionados
Selection of standard stars for photometric observations with the 91-cm reflector at Okayama
Not Available
| The infrared light curve of U Geminorum
IR observations of the dwarf nova U Geminorum show the periodic doublewave of an ellipsoidal variable, with an amplitude of 0.25 mag, which isreproduced in calculations of the rotational light curve of the tidallydistorted red dwarf star in the system. This star, which is required tofill U Geminorum's Roche lobe, exhibits a variation amplitude which isconsistent with (1) the expected geometrical elements of the system, (2)convective gravity darkening, and (3) a moderate degree of limbdarkening. Agreement with observations is improved by the reflectioneffect if only about 1/4 of the observed hot star luminosity is seen bythe cool star. The ellipsoidal variation marks the orbital conjunctionsfor reference with the times of the optical eclipse of the bright spot.The system's IR colors are those of a middle M dwarf star.
| Three-Color Photometry of U Geminorum During an Outburst
Not Available
|
Enviar un nuevo artículo
Enlaces relacionados
- - No se han encontrado enlaces -
En viar un nuevo enlace
Miembro de los siguientes grupos:
|
Datos observacionales y astrométricos
| Constelación: | Géminis |
| Ascensión Recta: | 07h55m08.58s |
| Declinación: | +21°40'16.8" |
| Magnitud Aparente: | 8.652 |
| Distancia: | 330.033 parsecs |
| Movimiento Propio en Ascensión Recta: | -15.1 |
| Movimiento Propio en Declinación: | 3.6 |
| B-T magnitude: | 9.068 |
| V-T magnitude: | 8.687 |
Catálogos y designaciones:
|
INHABITED SKY
