Asteroseismology of the roAp Star α Cir Using the WIRE Star Camera

Details Asteroseismology of the roAp Star α Cir Using the WIRE Star Camera Asteroseismology of the roAp Star α Cir Using the WIRE Star Camera

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19913311b&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #133.11; Bulletin of the American Astronomical Society, Vol. 33, p.1501

Astronomy and Astrophysics

Astronomy

Scientific paper

Using the camera on board the WIRE spacecraft, we observed α Cir from 18 August through 29 September 2000. α Cir is the brightest roAp star in the sky. Previous observers have detected a single oscillation mode at 2442 μ Hz, split by the rotational frequency, though Kurtz et al. (1994) reported the marginal detection of four low-amplitude secondary frequencies. Our time series has considerably improved signal-to-noise compared with past attempts. However, though we do directly detect the rotation of α Cir, we see no sign of the secondary frequencies reported earlier.

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