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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

  • Authors: May G. Pedersen, Sowgata Chowdhury, Cole Johnston, Dominic M. Bowman, Conny Aerts, Gerald Handler, Peter De Cat, Coralie Neiner, Alexandre David-Uraz, Derek Buzasi, Andrew Tkachenko, Sergio Simón-Díaz, Ehsan Moravveji, James Sikora, Giovanni M. Mirouh, Catherine C. Lovekin, Matteo Cantiello, Jadwiga Daszyńska-Daszkiewicz, Andrzej Pigulski, Roland K. Vanderspek, and George R. Ricker

2019 The Astrophysical Journal Letters 872 L9.

  • Provider: AAS Journals

Caption: Figure 1.

Classification results for O and B stars placed in a Gaia second data release (DR2) color–magnitude diagram (CMD). Black dots are the entire Transiting Exoplanet Survey Satellite (TESS) sector 1 and 2 short-cadence stars also observed by Gaia, and open black circles corresponds to uncertain classification. The labels in the legend correspond to the following types of variability: SLF = stochastic low-frequency signal; Instr/const = instrumental or constant; SPB = slowly pulsating B star; ROT = rotational modulation; ROT/SPB = rotational modulation and/or SPB; Hybrid puls.? = both p- and g-modes; EB = eclipsing binary; EV? = ellipsodal variable or rotational modulation; δ Sct = δ Scuti star. The error bar shows a typical 2σ-error on the position in the CMD, shown in both panels. Large Magellanic Cloud members are indicated by an × behind their variability symbol.

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