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The Sophie Search For Northern Extrasolar Planets Xvi. Hd 158259: A Compact Planetary System In A Near-3:2 Mean Motion Resonance Chain, Nathan Hara, François Bouchy, Manu Stalport, Isabelle Boisse, J. Rodrigues, Jean-Baptiste Delisle, Alexandre Santerne, Gregory W. Henry, Luc Arnold, Nicola Astudillo-Defru, Simon Borgniet, Xavier Bonfils, Vincent Bourrier, Bastien Brugger, B. Courcol, Shweta Dalal, Magali Deleuil, Xavier Delfosse, Olivier Demangeon, Rodrigo F. Díaz, Xavier Dumusque, Thierry Forveille, Guillaume Hébrard, Melissa J. Hobson, ‪Flavien Kiefer, Théodore Lopez, ‪Lucile Mignon, Olivier Mousis, Claire Moutou, Francesco Pepe, Javiera Rey, Nuno C. Santos, Damien Ségransan, Stéphane Udry, Paul Anthony Wilson

Information Systems and Engineering Management Research Publications

Aims. Since 2011, the SOPHIE spectrograph has been used to search for Neptunes and super-Earths in the northern hemisphere. As part of this observational program, 290 radial velocity measurements of the 6.4 V magnitude star HD 158259 were obtained. Additionally, TESS photometric measurements of this target are available. We present an analysis of the SOPHIE data and compare our results with the output of the TESS pipeline.

Methods. The radial velocity data, ancillary spectroscopic indices, and ground-based photometric measurements were analyzed with classical and ℓ₁ periodograms. The stellar activity was modeled as a correlated Gaussian noise and its impact …