Abstract
New Variable Stars in the Constellation Norma.—Arrangements have been made for the interchange of observers between the observatories of Johannesburg and Leyden. Mr. H. van Gent has taken a number of plates with the Franklin-Adams telescope at Johannesburg which were measured at Leyden by W. E. Kruytbosch (Bull. Astr. Instit. Netherlands, vol. 5, No. 194). The blink-microscope revealed 25 variables upon them, and afforded sufficient material for plotting the light-curves, which are given in the Bulletin together with diagrams of the fields. The second star on the list is an eclipsing variable of the W. Urs. Maj. type. Prof. Hertzsprung suggests, from the long stationary minimum, that either the companion is a white dwarf or that the system contains a third star from which most of the light comes during minimum. There are also some Cepheid variables: p on the list has a period of 2–4 days and a large light-range.
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Our Astronomical Column. Nature 126, 254 (1930). https://doi.org/10.1038/126254a0
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DOI: https://doi.org/10.1038/126254a0