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A 20 Second Cadence View of Solar-type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Recharacterization of p Men c

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

DOI

  • Daniel Huber, University of Hawaii at Manoa
    • ,
  • Timothy R. White, University of Sydney
    • ,
  • Travis S. Metcalfe
  • Ashley Chontos, University of Hawaii at Manoa
    • ,
  • Michael M. Fausnaugh, Massachusetts Institute of Technology
    • ,
  • Cynthia S.K. Ho, University College London
    • ,
  • Vincent Van Eylen, University College London
    • ,
  • Warrick H. Ball, University of Birmingham
    • ,
  • Sarbani Basu, Yale University
    • ,
  • Timothy R. Bedding, University of Sydney
    • ,
  • Othman Benomar, NYU Abu Dhabi, National Institutes of Natural Sciences - National Astronomical Observatory of Japan
    • ,
  • Diego Bossini, University of Porto
    • ,
  • Sylvain Breton, Universite Paris-Saclay
    • ,
  • Derek L. Buzasi, Florida Gulf Coast University
    • ,
  • Tiago L. Campante, University of Porto
    • ,
  • William J. Chaplin, University of Birmingham
    • ,
  • Jørgen Christensen-Dalsgaard
  • Margarida S. Cunha, University of Porto
    • ,
  • Morgan Deal, University of Porto
    • ,
  • Rafael A. Garciá, Universite Paris-Saclay
    • ,
  • Antonio Garciá Munoz, Universite Paris-Saclay
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  • Charlotte Gehan, University of Porto, Max Planck Institute for Solar System Research
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  • Luciá González-Cuesta, Instituto Astrofisico de Canarias, University of La Laguna
    • ,
  • Chen Jiang, Max Planck Institute for Solar System Research
    • ,
  • Cenk Kayhan, Erciyes University
    • ,
  • Hans Kjeldsen
  • Mia S. Lundkvist
  • Stéphane Mathis, Universite Paris-Saclay
    • ,
  • Savita Mathur, Instituto Astrofisico de Canarias, University of La Laguna
    • ,
  • Mário J.P.F.G. Monteiro, University of Porto
    • ,
  • Benard Nsamba, Max Planck Institute for Astrophysics, University of Porto, Kyambogo acad
    • ,
  • Jia Mian Joel Ong, Yale University
    • ,
  • Erika Pakštiene, Vilnius University
    • ,
  • Aldo M. Serenelli, CSIC, Institute of Space Studies of Catalonia
    • ,
  • Victor Silva Aguirre
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  • Keivan G. Stassun, Vanderbilt University, Vanderbilt Initiative in Data-intensive Astrophysics (VIDA)
    • ,
  • Dennis Stello
  • Sissel Norgaard Stilling
    • ,
  • Mark Lykke Winther
  • Tao Wu, CAS - National Astronomical Observatories, Chinese Academy of Sciences, University of Chinese Academy of Sciences
    • ,
  • Thomas Barclay, NASA Goddard Space Flight Center, University of Maryland, Baltimore
    • ,
  • Tansu Daylan, Massachusetts Institute of Technology
    • ,
  • Maximilian N. Günther, Massachusetts Institute of Technology
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  • J. J. Hermes, Boston University
    • ,
  • Jon M. Jenkins, NASA Ames Research Center
    • ,
  • David W. Latham, Harvard University
    • ,
  • Alan M. Levine, Massachusetts Institute of Technology
    • ,
  • George R. Ricker, Massachusetts Institute of Technology
    • ,
  • Sara Seager, Massachusetts Institute of Technology
    • ,
  • Avi Shporer, Massachusetts Institute of Technology
    • ,
  • Joseph D. Twicken, NASA Ames Research Center, SETI Institute
    • ,
  • Roland K. Vanderspek, Massachusetts Institute of Technology
    • ,
  • Joshua N. Winn, Princeton University

We present an analysis of the first 20 second cadence light curves obtained by the TESS space telescope during its extended mission. We find improved precision of 20 second data compared to 2 minute data for bright stars when binned to the same cadence (˜10%-25% better for T ? 8 mag, reaching equal precision at T ˜ 13 mag), consistent with pre-flight expectations based on differences in cosmic-ray mitigation algorithms. We present two results enabled by this improvement. First, we use 20 second data to detect oscillations in three solar analogs (? Pav, ? Tuc, and p Men) and use asteroseismology to measure their radii, masses, densities, and ages to ˜1%, ˜3%, ˜1%, and ˜20% respectively, including systematic errors. Combining our asteroseismic ages with chromospheric activity measurements, we find evidence that the spread in the activity-age relation is linked to stellar mass and thus the depth of the convection zone. Second, we combine 20 second data and published radial velocities to recharacterize p Men c, which is now the closest transiting exoplanet for which detailed asteroseismology of the host star is possible. We show that p Men c is located at the upper edge of the planet radius valley for its orbital period, confirming that it has likely retained a volatile atmosphere and that the "asteroseismic radius valley"remains devoid of planets. Our analysis favors a low eccentricity for p Men c (<0.1 at 68% confidence), suggesting efficient tidal dissipation (Q/k 2,1 ? 2400) if it formed via high-eccentricity migration. Combined, these early results demonstrate the strong potential of TESS 20 second cadence data for stellar astrophysics and exoplanet science.

OriginalsprogEngelsk
Artikelnummer79
TidsskriftAstronomical Journal
Vol/bind163
Nummer2
ISSN0004-6256
DOI
StatusUdgivet - feb. 2022

Bibliografisk note

Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society..

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