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Very regular high-frequency pulsation modes in young intermediate-mass stars

Author

Listed:
  • Timothy R. Bedding

    (University of Sydney
    Aarhus University)

  • Simon J. Murphy

    (University of Sydney
    Aarhus University)

  • Daniel R. Hey

    (University of Sydney
    Aarhus University)

  • Daniel Huber

    (University of Hawai‘i)

  • Tanda Li

    (University of Sydney
    Aarhus University
    University of Birmingham)

  • Barry Smalley

    (Keele University)

  • Dennis Stello

    (Aarhus University
    University of New South Wales)

  • Timothy R. White

    (University of Sydney
    Aarhus University
    The Australian National University)

  • Warrick H. Ball

    (Aarhus University
    University of Birmingham)

  • William J. Chaplin

    (Aarhus University
    University of Birmingham)

  • Isabel L. Colman

    (University of Sydney
    Aarhus University)

  • Jim Fuller

    (TAPIR, California Institute of Technology)

  • Eric Gaidos

    (University of Hawai‘i)

  • Daniel R. Harbeck

    (Las Cumbres Observatory Global Telescope)

  • J. J. Hermes

    (Boston University)

  • Daniel L. Holdsworth

    (University of Central Lancashire)

  • Gang Li

    (University of Sydney
    Aarhus University)

  • Yaguang Li

    (University of Sydney
    Aarhus University
    Beijing Normal University)

  • Andrew W. Mann

    (University of North Carolina at Chapel Hill)

  • Daniel R. Reese

    (LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris)

  • Sanjay Sekaran

    (Instituut voor Sterrenkunde (IvS), KU Leuven)

  • Jie Yu

    (Max-Planck-Institut für Sonnensystemforschung)

  • Victoria Antoci

    (Aarhus University
    Technical University of Denmark)

  • Christoph Bergmann

    (University of New South Wales)

  • Timothy M. Brown

    (Las Cumbres Observatory Global Telescope)

  • Andrew W. Howard

    (TAPIR, California Institute of Technology)

  • Michael J. Ireland

    (The Australian National University)

  • Howard Isaacson

    (University of California at Berkeley)

  • Jon M. Jenkins

    (NASA Ames Research Center)

  • Hans Kjeldsen

    (Aarhus University
    Vilnius University)

  • Curtis McCully

    (Las Cumbres Observatory Global Telescope)

  • Markus Rabus

    (Las Cumbres Observatory Global Telescope
    University of California)

  • Adam D. Rains

    (The Australian National University)

  • George R. Ricker

    (Massachusetts Institute of Technology
    Massachusetts Institute of Technology)

  • Christopher G. Tinney

    (University of New South Wales)

  • Roland K. Vanderspek

    (Massachusetts Institute of Technology
    Massachusetts Institute of Technology)

Abstract

Asteroseismology probes the internal structures of stars by using their natural pulsation frequencies1. It relies on identifying sequences of pulsation modes that can be compared with theoretical models, which has been done successfully for many classes of pulsators, including low-mass solar-type stars2, red giants3, high-mass stars4 and white dwarfs5. However, a large group of pulsating stars of intermediate mass—the so-called δ Scuti stars—have rich pulsation spectra for which systematic mode identification has not hitherto been possible6,7. This arises because only a seemingly random subset of possible modes are excited and because rapid rotation tends to spoil regular patterns8–10. Here we report the detection of remarkably regular sequences of high-frequency pulsation modes in 60 intermediate-mass main-sequence stars, which enables definitive mode identification. The space motions of some of these stars indicate that they are members of known associations of young stars, as confirmed by modelling of their pulsation spectra.

Suggested Citation

  • Timothy R. Bedding & Simon J. Murphy & Daniel R. Hey & Daniel Huber & Tanda Li & Barry Smalley & Dennis Stello & Timothy R. White & Warrick H. Ball & William J. Chaplin & Isabel L. Colman & Jim Fuller, 2020. "Very regular high-frequency pulsation modes in young intermediate-mass stars," Nature, Nature, vol. 581(7807), pages 147-151, May.
    • Handle: RePEc:nat:nature:v:581:y:2020:i:7807:d:10.1038_s41586-020-2226-8
    DOI: 10.1038/s41586-020-2226-8
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