Gaia Data Release 3: Pulsations in main sequence OBAF-type stars
Creators: name: Gaia Collaboration
name: De Ridder, J.
name: Ripepi, V.
name: Aerts, C.
name: Palaversa, L.
name: Eyer, L.
name: Holl, B.
name: Audard, M.
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name: Brown, A. G. A.
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name: de Bruijne, J. H. J.
name: Arenou, F.
name: Babusiaux, C.
name: Biermann, M.
name: Creevey, O. L.
name: Ducourant, C.
name: Evans, D. W.
name: Guerra, R.
name: Hutton, A.
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name: Luri, X.
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name: Pourbaix, D.
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name: Bastian, U.
name: Drimmel, R.
name: Jansen, F.
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name: Lattanzi, M. G.
name: van Leeuwen, F.
name: Bakker, J.
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name: Altmann, M.
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name: Bellas-Velidis, I.
name: Benson, K.
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name: Busso, G.
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name: Cheek, N.
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name: Davidson, M.
name: de Teodoro, P.
name: Campos, M. Nuñez
name: Delchambre, L.
name: Dell'Oro, A.
name: Esquej, P.
name: Fernández-Hernández, J.
name: Fraile, E.
name: Garabato, D.
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name: Gosset, E.
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name: Mieres, D. Ruz
name: Rybicki, K. A.
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name: Núñez, A. Sáez
name: Sellés, A. Sagristà
name: Sahlmann, J.
name: Salguero, E.
name: Samaras, N.
name: Gimenez, V. Sanchez
name: Sanna, N.
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name: Schultheis, M.
name: Sciacca, E.
name: Segol, M.
name: Segovia, J. C.
name: Ségransan, D.
name: Semeux, D.
name: Shahaf, S.
name: Siddiqui, H. I.
name: Siebert, A.
name: Siltala, L.
name: Silvelo, A.
name: Slezak, E.
name: Slezak, I.
name: Smart, R. L.
name: Snaith, O. N.
name: Solano, E.
name: Solitro, F.
name: Souami, D.
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name: Spagna, A.
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name: Steele, I. A.
name: Steidelmüller, H.
name: Stephenson, C. A.
name: Süveges, M.
name: Surdej, J.
name: Szabados, L.
name: Szegedi-Elek, E.
name: Taris, F.
name: Taylor, M. B.
name: Teixeira, R.
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name: Tonello, N.
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name: Trabucchi, M.
name: Tsounis, A. T.
name: Turon, C.
name: Ulla, A.
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name: Vaillant, M. V.
name: van Dillen, E.
name: van Reeven, W.
name: Vanel, O.
name: Vecchiato, A.
name: Viala, Y.
name: Vicente, D.
name: Voutsinas, S.
name: Weiler, M.
name: Wevers, T.
name: Wyrzykowski, Ł.
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name: Zhao, H.
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Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The third Gaia data release provides photometric time series covering 34 months for about 10 million stars. For many of those stars, a characterisation in Fourier space and their variability classification are also provided. This paper focuses on intermediate- to high-mass (IHM) main sequence pulsators M &gt;= 1.3 Msun) of spectral types O, B, A, or F, known as beta Cep, slowly pulsating B (SPB), delta Sct, and gamma Dor stars. These stars are often multi-periodic and display low amplitudes, making them challenging targets to analyse with sparse time series. All datasets used in this analysis are part of the Gaia DR3 data release. The photometric time series were used to perform a Fourier analysis, while the global astrophysical parameters necessary for the empirical instability strips were taken from the Gaia DR3 gspphot tables, and the vsini data were taken from the Gaia DR3 esphs tables. We show that for nearby OBAF-type pulsators, the Gaia DR3 data are precise and accurate enough to pinpoint them in the Hertzsprung-Russell diagram. We find empirical instability strips covering broader regions than theoretically predicted. In particular, our study reveals the presence of fast rotating gravity-mode pulsators outside the strips, as well as the co-existence of rotationally modulated variables inside the strips as reported before in the literature. We derive an extensive period-luminosity relation for delta Sct stars and provide evidence that the relation features different regimes depending on the oscillation period. Finally, we demonstrate how stellar rotation attenuates the amplitude of the dominant oscillation mode of delta Sct stars.