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Kepler-102: Masses and Compositions for a Super-Earth and Sub-Neptune Orbiting an Active Star

  • Authors: Casey L. Brinkman, James Cadman, Lauren Weiss, Eric Gaidos, Ken Rice, Daniel Huber, Zachary R. Claytor, Aldo S. Bonomo, Lars A. Buchhave, Andrew Collier Cameron, Rosario Cosentino, Xavier Dumusque, Aldo F. Martinez Fiorenzano, Adriano Ghedina, Avet Harutyunyan, Andrew Howard, Howard Isaacson, David W. Latham, Mercedes López-Morales, Luca Malavolta, Giuseppina Micela, Emilio Molinari, Francesco Pepe, David F. Philips, Ennio Poretti, Alessandro Sozzetti, Stéphane Udry

Casey L. Brinkman et al 2023 The Astronomical Journal 165 .

  • Provider: AAS Journals

Caption: Figure 4.

Lomb–Scargle periodograms (LSPs) of the activity indicators for each radial velocity (RV) data set (S-index for HIRES, FWHM for HARPS-N) show a notable peak at 6.5 days, which is one quarter the rotation period (or third harmonic of the rotation period) of the star. In the HIRES S-index LSP we identify a very tentative signal at 25 days (within one standard deviation of the rotation period of the star), while in the HARPS-N FWHM LSP there is not an identifiable signal at the rotation period. The strong peak at the third harmonic of the rotation period suggests that the rotation period of the star is consistent over the timescale of RV data collection and is consistent with the rotation period derived from the Kepler photometry.

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