Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...118..289d&link_type=abstract
Astronomy and Astrophysics, vol. 118, no. 2, Feb. 1983, p. 289-293.
Astronomy and Astrophysics
Astrophysics
9
A Stars, Magnetic Stars, Peculiar Stars, Shell Stars, Stellar Spectrophotometry, Variable Stars, Astronomical Catalogs, Light Curve, Stellar Color
Scientific paper
VBLUW photometry (Walraven system) of three magnetic Ap stars and one peculiar shell star is presented. HD 137949 (33 Lib) shows no optical variations exceeding 0.01 mag, with respect to the proposed periods of 18d.4 and 23d.26. The peculiar shell star HD 190073 shows irregular light variations on a time scale of months, although the presence of shorter variations cannot be ruled out. For the star HD 201601 (γ Equ) it is still hard to except any of the three proposed periods: 317d, 1785d.7, and 72 yr, because of the limitations of the observations. The star HD 203006 (θ Mic) showing a periodic light variation with a double wave, has the revised period of 2d.1215±0d.0001.
Deul Erik R.
van Genderen Arnout M.
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