Asteroseismic Properties of Solar-type Stars Observed with the NASA K2 Mission: Results from Campaigns 1-3 and Prospects for Future Observations

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  • Mikkel N. Lund
  • William J. Chaplin, Univ Birmingham, University of Birmingham, Sch Phys & Astron, Aarhus Univ, Aarhus University, Stellar Astrophys Ctr, Dept Phys & Astron
  • ,
  • Luca Casagrande, Australian Natl Univ, Australian National University, Res Sch Astron & Astrophys, Mt Stromlo Observ
  • ,
  • Victor Silva Aguirre
  • Sarbani Basu, Yale Univ, Yale University, Dept Astron
  • ,
  • Allyson Bieryla, Harvard University
  • ,
  • Jorgen Christensen-Dalsgaard
  • David W. Latham, Harvard University
  • ,
  • Tim White
  • ,
  • Guy R. Davies, Univ Birmingham, University of Birmingham, Sch Phys & Astron, Aarhus Univ, Aarhus University, Stellar Astrophys Ctr, Dept Phys & Astron
  • ,
  • Daniel Huber, Aarhus Univ, Aarhus University, Stellar Astrophys Ctr, Dept Phys & Astron, Univ Sydney, University of Sydney, SIfA, Sch Phys, SETI Inst
  • ,
  • Lars A. Buchhave, Univ Copenhagen, University of Copenhagen, Ctr Star & Planet Format, Nat Hist Museum Denmark, Univ Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Inst
  • ,
  • Rasmus Handberg

We present an asteroseismic analysis of 33 solar-type stars observed in short cadence (SC) during Campaigns (C) 1-3 of the NASA K2 mission. We were able to extract both average seismic parameters and individual mode frequencies for stars with dominant frequencies up to similar to 3300 mu Hz, and we find that data for some targets are good enough to allow for a measurement of the rotational splitting. Modeling of the extracted parameters is performed by using grid-based methods using average parameters and individual frequencies together with spectroscopic parameters. For the target selection in C3, stars were chosen as in C1 and C2 to cover a wide range in parameter space to better understand the performance and noise characteristics. For C3 we still detected oscillations in 73% of the observed stars that we proposed. Future K2 campaigns hold great promise for the study of nearby clusters and the chemical evolution and age-metallicity relation of nearby field stars in the solar neighborhood. We expect oscillations to be detected in similar to 388 SC targets if the K2 mission continues until C18, which will greatly complement the similar to 500 detections of solar-like oscillations made for SC targets during the nominal Kepler mission. For similar to 30-40 of these, including several members of the Hyades open cluster, we furthermore expect that inference from interferometry should be possible.

OriginalsprogEngelsk
Artikelnummer124204
TidsskriftPublications of the Astronomical Society of the Pacific (PASP)
Vol/bind128
Nummer970
Antal sider19
ISSN0004-6280
DOI
StatusUdgivet - dec. 2016

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