Photometric detection of internal gravity waves in upper main-sequence stars

Bowman, D. M.; Burssens, S.; Simón-Díaz, S.; Edelmann, P. F.; Rogers, T. M.; Horst, L.; Röpke, F. K.; Aerts, C.

doi:10.1051/0004-6361/202038224

Photometric detection of internal gravity waves in upper main-sequence stars

Journal Article · Fri Aug 07 00:00:00 EDT 2020 · Astronomy and Astrophysics

DOI:https://doi.org/10.1051/0004-6361/202038224· OSTI ID:1671105

^[1]; ^[1]; ^[2]; ^[3]; Rogers, T. M. ^[4]; ^[5]; ^[6]; ^[7]

KU Leuven (Belgium). Inst. of Astronomy
Inst. de Astrofisica de Canarias, La Laguna (Spain); Univ. de La Laguna (Spain)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Theoretical Astrophysics (CTA)
Newcastle Univ., Newcastle-upon-Tyne (United Kingdom); Planetary Science Inst., Tucson, AZ (United States)
Heidelberger Inst. für Theoretische Studien, Heidelberg (Germany)
Heidelberger Inst. für Theoretische Studien, Heidelberg (Germany); Univ. Heidelberg (Germany)
KU Leuven (Belgium). Inst. of Astronomy; Radboud Univ., Nijmegen (Netherlands); Max Planck Inst. for Astronomy, Heidelberg (Germany)

Massive stars are predicted to excite internal gravity waves (IGWs) by turbulent core convection and from turbulent pressure fluctuations in their near-surface layers. These IGWs are extremely efficient at transporting angular momentum and chemical species within stellar interiors, but they remain largely unconstrained observationally. In this work, we aim to characterise the photometric detection of IGWs across a large number of O and early-B stars in the Hertzsprung–Russell diagram, and explain the ubiquitous detection of stochastic variability in the photospheres of massive stars. Furthermore, we combined high-precision time-series photometry from the NASA Transiting Exoplanet Survey Satellite with high-resolution ground-based spectroscopy of 70 stars with spectral types O and B to probe the relationship between the photometric signatures of IGWs and parameters such as spectroscopic mass, luminosity, and macroturbulence.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Aeronautic and Space Administration (NASA); European Union Horizon 2020; Ministerio de Ciencia e Innovacion

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1671105

Report Number(s):: LA-UR--20-24391

Journal Information:: Astronomy and Astrophysics, Journal Name: Astronomy and Astrophysics Vol. 640; ISSN 0004-6361

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

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Sub-Inertial Gravity Modes in the b8v star kic 7760680 Reveal Moderate core Overshooting and low Vertical Diffusive Mixing Moravveji, Ehsan; Townsend, Richard H. D.; Aerts, Conny The Astrophysical Journal, Vol. 823, Issue 2 https://doi.org/10.3847/0004-637X/823/2/130	journal	May 2016
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The Spectroscopic Hertzsprung–Russell Diagram of Hot Massive Stars in the Small Magellanic Cloud Castro, N.; Oey, M. S.; Fossati, L. The Astrophysical Journal, Vol. 868, Issue 1 https://doi.org/10.3847/1538-4357/aae6d0	journal	November 2018
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The Interior Angular Momentum of Core Hydrogen Burning Stars from Gravity-mode Oscillations Aerts, C.; Reeth, T. Van; Tkachenko, A. The Astrophysical Journal, Vol. 847, Issue 1 https://doi.org/10.3847/2041-8213/aa8a62	journal	September 2017
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Diverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample Pedersen, May G.; Chowdhury, Sowgata; Johnston, Cole The Astrophysical Journal, Vol. 872, Issue 1 https://doi.org/10.3847/2041-8213/ab01e1	journal	February 2019
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