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- W1793176439 abstract "We have conducted a high-resolution, high signal- to-noise spectroscopic survey of the members of the peculiar Boo stars accessible from the Canada-France-Hawaii Tele- scope to investigate the incidence of high-degree nonradial pul- sation (NRP) in these metal-deficient stars. Of 16 objects ob- served more than once, 9 show conclusive evidence of such NRP, which confirms that pulsational instability is a common phenomenon in the Boo class. The widespread presence of NRP in the Boo stars indi- rectly supports the accretion/diffusion scenario for the forma- tion of these objects, but unfortunately does not rule out other possible causes for the phenomena. However, extensive time- series photometry and spectroscopy of several particularly inter- esting pulsating members of the class noted here should provide asteroseismologists with the eigenfrequency data needed to re- solve the current debate concerning the evolutionary status, and hence, the origin of these peculiar stars. From our survey, we also identify a set of four stars, including Boo itself, with similar fundamental parameters but remarkably different pul- sation characteristic. These stars may offer vital clues as to the physical excitation of Boo pulsations." @default.
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- W1793176439 date "1999-10-01" @default.
- W1793176439 modified "2023-09-27" @default.
- W1793176439 title "THE INCIDENCE OF NONRADIAL PULSATION IN THE LAMBDA BOOTIS STARS" @default.
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