Browsing by Subject "Ubv Spectra"

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HD 147010:The AP star in the reflection nebula vdB 102 in upper scorpius region

Kameswara Rao, N; Rajamohan, R (Indian Academy of Sciences, 1982-09)

HD 147010, which is in the reflection nebula vdB 102, has been found to be a hot Ap silicon star rather than a normal A supergiant. From the UBV and JHK photometry of the star, color excess E(B-V) of 0.29 and the ratio of ...
Spot activity in the RS CVn binary HR 1099

Mekkaden, M. V; Raveendran, A. V; Mohin, S (Indian Academy of Sciences, 1982-03)

UBV photometry of HR 1099 obtained during the 1979-80 and 1980-81 observing seasons is presented. An analysis of the available data shows that the brightness at the light curve maximum increases as the wave amplitude ...
UBV Observations of R-Coronae Type Variables and Related Objects

Kameswara Rao, N (D. Reidel Publishing Co., 1980-07)

UBV observations obtained during the period 1972-73 are presented for the following five R CrB stars: GU Sgr, SU Tau, XX CAm, DZ And, V973 Oph, and the hydrogen-poor, carbon-rich stars BD + 10 deg 2179 and HD 137613. ...

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