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- W2038837785 abstract "Polaris has a spectroscopic orbit determined from an extensive series of observations as well as a more uncertain astrometric orbit. The determination of its mass and evolutionary state is of considerable interest because it is a low-amplitude classical Cepheid with unusual period and amplitude variations. In this study, IUE spectra are investigated to search for light from the companion. The spectra of Polaris from 1600 A to 3200 A are a good match for nonvariable supergiants of similar spectral type. The lack of any excess flux at the shortest wavelengths implies that a main-sequence companion must be later than A8 V. Although this is the most likely companion, the ultraviolet observations cannot rule out a white dwarf 15,000 K or cooler. Both these companions are consistent with either an evolutionary mass or a smaller pulsation mass for the Cepheid." @default.
- W2038837785 created "2016-06-24" @default.
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- W2038837785 date "1988-06-01" @default.
- W2038837785 modified "2023-09-25" @default.
- W2038837785 title "A search for the binary companion of Polaris" @default.
- W2038837785 doi "https://doi.org/10.1086/132226" @default.
- W2038837785 hasPublicationYear "1988" @default.
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