Asteroseismology of Solar-Type Stars with K2: Detection of Oscillations in C1 Data

ISSN
0004-6280
Date Issued
2015
Author(s)
Chaplin, W. J.
Lund, M. N.
Handberg, R.
Basu, S.
Buchhave, L. A.
Campante, T. L.
Davies, G. R.
Huber, D.
Latham, D. W.
Latham, C. A.
Serenelli, A.
Antia, H. M.
Appourchaux, Thierry
Benomar, O.
Casagrande, L.
Christensen-Dalsgaard, J.
Coelho, H. R.
Creevey, O. L.
Elsworth, Y.
García, R. A.
Gaulme, P.
Hekker, S.
Kallinger, T.
Karoff, C.
Kawaler, S. D.
Kjeldsen, H.
Lundkvist, M. S.
Marcadon, F.
Mathur, Saurabh
Miglio, A.
Mosser, B.
Régulo, C.
Roxburgh, I. W.
Silva Aguirre, V.
Stello, D.
Verma, K.
White, T. R.
Bedding, T. R.
Barclay, T.
Buzasi, D. L.
Dehuevels, S.
Houdek, G.
Howell, S. B.
Salabert, D.
Soderblom, D. R.
DOI
10.1086/683103
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 μHz. 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 2.5 in amplitude would bring main-sequence stars with dominant oscillation frequencies as high as sime2500 μHz into play as potential asteroseismic targets for K2.