Catalogue of solar-like oscillators observed by TESS in 120-s and 20-s cadence

Emily Hatt*, Martin B. Nielsen, William J. Chaplin, Warrick H. Ball, Guy R. Davies, Timothy R. Bedding, Derek L. Buzasi, Ashley Chontos, Daniel Huber, Cenk Kayhan, Yaguang Li, Timothy R. White, Chen Cheng, Travis S. Metcalfe, Dennis Stello

*Corresponding author af dette arbejde

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Abstract

Context. The Transiting Exoplanet Survey Satellite (TESS) mission has provided photometric light curves for stars across nearly the entire sky. This allows for the application of asteroseismology to a pool of potential solar-like oscillators that is unprecedented in size. Aims. We aim to produce a catalogue of solar-like oscillators observed by TESS in the 120-s and 20-s cadence modes. The catalogue is intended to highlight stars oscillating at frequencies above the TESS 30-min cadence Nyquist frequency with the purpose of encompassing the main-sequence and subgiant evolutionary phases. We aim to provide estimates for the global asteroseismic parameters vmax and -v. Methods. We applied a new probabilistic detection algorithm to the 120-s and 20-s light curves of over 250 000 stars. This algorithm flags targets that show characteristic signatures of solar-like oscillations. We manually vetted the resulting list of targets to confirm the presence of solar-like oscillations. Using the probability densities computed by the algorithm, we measured the global asteroseismic parameters vmax and -v. Results. We produce a catalogue of 4177 solar-like oscillators, reporting -v and vmax for 98% of the total star count. The asteroseismic data reveal a vast coverage of the Hertzsprung-Russell diagram, populating the red giant branch, the subgiant regime, and extending towards the main sequence. Conclusions. A crossmatch with external catalogues shows that 25 of the detected solar-like oscillators are a component of a spectroscopic binary, and 28 are confirmed planet host stars. These results provide the potential for precise, independent asteroseismic constraints on these and any additional TESS targets of interest.

OriginalsprogEngelsk
ArtikelnummerA67
TidsskriftAstronomy and Astrophysics
Vol/bind669
Antal sider11
ISSN0004-6361
DOI
StatusUdgivet - jan. 2023

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