Asteroseismology of Solar-Type Stars with K2: Detection of Oscillations in C1 Data
Abstract
We present the first detections by the NASA K2 Mission of oscillations in solar-type stars, using short-cadence data collected during K2 Campaign\,1 (C1). We understand the asteroseismic detection thresholds for C1-like levels of photometric performance, and we can detect oscillations in subgiants having dominant oscillation frequencies around $1000\,\rm \mu Hz$. Changes to the operation of the fine-guidance sensors are expected to give significant improvements in the high-frequency performance from C3 onwards. A reduction in the excess high-frequency noise by a factor of two-and-a-half in amplitude would bring main-sequence stars with dominant oscillation frequencies as high as ${\simeq 2500}\,\rm \mu Hz$ into play as potential asteroseismic targets for K2.
- Publication:
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Publications of the Astronomical Society of the Pacific
- Pub Date:
- October 2015
- DOI:
- 10.1086/683103
- arXiv:
- arXiv:1507.01827
- Bibcode:
- 2015PASP..127.1038C
- Keywords:
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- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- Accepted for publication in PASP