Browsing by Subject "K stars"

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BV photometry of UX ARIETIS

Mohin, S; Raveendran, A. V (Indian Academy of Sciences, 1989-03)

Differential BV photometry of UX Ari obtained on 58 nights during 1984-1985, 1985-1986, 1986-1987, and 1987-1988 observing season is presented. It is found that (B-V) is phase dependent, with the system being reddest at ...
CCD observations of the H-alpha line in late G and K supergiants and their interpretation

Mallik, S. G. V (American Astronomical Society, 1993-01-01)

CCD echelle spectra of the H-alpha line at 6563 A have been obtained for a sample of 30 G and K supergiants with a spectral resolution of about 0.24 A. The data clearly indicate that the observed H-alpha profile is a deep ...
Expanding chromospheres of late G and K supergiants

Mallik, S. G. V (Royal Astronomical Society, 1986-09)

The radiative transfer problem in non-LTE moving atmospheres has been explicitly solved for Hα line profiles. These computations have been done for a schematic model of the line-forming region over a wide range of optical ...

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