The HD 191939 Exoplanet System is Well-Aligned and Flat

The HD 191939 Exoplanet System is Well-Aligned and Flat

We report the sky-projected spin-orbit angle $\lambda$ for HD 191939 b, the innermost planet in a 6 planet system, using Keck/KPF to detect the Rossiter-McLaughlin (RM) effect. Planet b is a sub-Neptune with radius 3.4 $\pm$ 0.8 R$_{\oplus}$ and mass 10.0 $\pm$ 0.7 M$_{\oplus}$ with an RM amplitude...

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Hauptverfasser: Lubin, Jack, Petigura, Erik A, Van Zandt, Judah, Beard, Corey, Dai, Fei, Halverson, Samuel, Holcomb, Rae, Howard, Andrew W, Isaacson, Howard, Luhn, Jacob, Robertson, Paul, Rubenzahl, Ryan A, Stefansson, Gudmundur, Winn, Joshua N, Brodheim, Max, Deich, William, Hill, Grant M, Gibson, Steven R, Holden, Bradford, Householder, Aaron, Laher, Russ R, Lanclos, Kyle, Payne, Joel, Roy, Arpita, Smith, Roger, Shaum, Abby P, Schwab, Christian, Walawender, Josh
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Sprache:eng
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Physics - Earth and Planetary Astrophysics
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Zusammenfassung:We report the sky-projected spin-orbit angle $\lambda$ for HD 191939 b, the innermost planet in a 6 planet system, using Keck/KPF to detect the Rossiter-McLaughlin (RM) effect. Planet b is a sub-Neptune with radius 3.4 $\pm$ 0.8 R$_{\oplus}$ and mass 10.0 $\pm$ 0.7 M$_{\oplus}$ with an RM amplitude $
DOI:10.48550/arxiv.2409.06795