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A Century of Radial-velocity and Astrometric Monitoring of 70 Oph AB: New PFS Data and Constraints on Possible Planetary Companions

  • Authors: Yiting Li, Michael R. Meyer, Skylar D'Angiolillo, Stephen R. Kane, R. Paul Butler, Stephen A. Shectman, Eric E. Mamajek, Johanna Teske, Jack Lubin, Paul Robertson, Jessie L. Christiansen, Howard Isaacson, Caleb K. Harada, Bradford Holden, William D. Cochran, Michael Endl, Jennifer Burt, Juliette Becker, Alyssa Jankowski, Peter Tuthill, Catherine A. Clark, Rachael M. Roettenbacher, Eric Nielsen, Eduardo Bendek, Armen Tokadjian, William Roberson, Kaitlin M. Kratter, Edwin Bergin, Dave Osip, Jeffrey D. Crane, Alex Davis, Gautam Vasisht

Yiting Li et al 2026 The Astrophysical Journal 1009 .

  • Provider: AAS Journals

Caption: Figure 10.

QP GP fit to the combined RVs of 70 Oph A. This is the best-fit model. The activity model is fit simultaneously to data from APF (green diamonds), Keck/HIRES (orange circles), McDonald (purple circles), and PFS (magenta pentagons). The shaded region shows the activity predictive mean and 1σ uncertainty. The QP kernel captures rotationally modulated stellar activity with a characteristic period of ∼19.8 days. Panel (a) shows the RV time series and activity model; panel (b) shows the residuals after subtracting the activity model.

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