New WIRE Detections of Oscillations in K Giants

Details New WIRE Detections of Oscillations in K Giants New WIRE Detections of Oscillations in K Giants

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.1407p&link_type=abstract

American Astronomical Society Meeting 205, #14.07; Bulletin of the American Astronomical Society, Vol. 36, p.1361

Astronomy and Astrophysics

Astronomy

Scientific paper

WIRE observations of K giants (e.g., α Boo, Retter et al. 2004) have revealed the presence of low-level variability in some K giants which is at least quasi-periodic, and which is suggestive of p-mode oscillations. In 2004 (Preston, Bruntt and Buzasi, Cool Stars 13), we presented new WIRE oscillation data for five K giants, some of which were strongly periodic. These were serendipitous WIRE targets: the four brightest background stars in each WIRE target field are designated ``secondary targets,'' and these data constitute an unbiased sample of bright field stars - necessarily these will include a large percentage of K giants.
In this paper, we present the second set of results from this unbiased sample of late-type giants observed by WIRE. Specifically, we present photometric data and preliminary periodograms for a number of K giants observed by WIRE within the last year. Oscillations have previously been quite hard to observe in K giants.

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