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The Interpolation Constraint in the RV Analysis of M Dwarfs Using Empirical Templates

  • Authors: Dhvani Doshi, Nicolas B. Cowan, Étienne Artigau, René Doyon, André M. Silva, Khaled Al Moulla, Yashar Hezaveh

Dhvani Doshi et al 2025 The Astronomical Journal 170 .

  • Provider: AAS Journals

Caption: Figure A1.

Retrieved planetary RV curves using either the intrinsic stellar spectrum or a template built from 50 observations, shown for three S/N regimes. There is also a BERV that contributes to the overall RV curve, however, only the planetary RV is plotted. Results are displayed for both SPIRou’s native sampling and an instrument with 4 pixels per FWHM. Semitransparent points show per-order RVs; opaque points show the order-combined RV. At SPIRou resolution, interpolation error from the template introduces random RV offsets, especially at high and moderate S/Ns, which are absent at finer sampling or when using the intrinsic spectrum.

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