UBVRIJHK light curves of four active RS CVn binaries, together with coordinated spectrophotometric observations in the range 1.4-2.5 microns, are presented. From the reconstruction of the whole spectral distributions (from U to K), the presence of spot-related photospheric perturbations and IR excesses is inferred. These excesses cannot be simply explained by a combination of stellar spectra (even changing the accepted spectral types). Analysis shows that thermal radiation from a thin dust shell surrounding the system may explain the data.
Evidence of thin dust shells in some RS CVn stars
BUSSO, Maurizio Maria;
1988
Abstract
UBVRIJHK light curves of four active RS CVn binaries, together with coordinated spectrophotometric observations in the range 1.4-2.5 microns, are presented. From the reconstruction of the whole spectral distributions (from U to K), the presence of spot-related photospheric perturbations and IR excesses is inferred. These excesses cannot be simply explained by a combination of stellar spectra (even changing the accepted spectral types). Analysis shows that thermal radiation from a thin dust shell surrounding the system may explain the data.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
