The TESS-Keck Survey. XVIII. A sub-Neptune and spurious long-period signal in the TOI-1751 system

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Détails bibliographiques
Auteurs principaux:	Desai, Anmol, Turtelboom, Emma V., Harada, Caleb K., Dressing, Courtney D., Rice, David R., Murphy, Joseph M. Akana, Brinkman, Casey L., Chontos, Ashley, Crossfield, Ian J. M., Dai, Fei, Hill, Michelle L., Fetherolf, Tara, Giacalone, Steven, Howard, Andrew W., Huber, Daniel, Isaacson, Howard, Kane, Stephen R., Lubin, Jack, MacDougall, Mason G., Mayo, Andrew W., Močnik, Teo, Polanski, Alex S., Rice, Malena, Robertson, Paul, Rubenzahl, Ryan A., Van Zandt, Judah, Weiss, Lauren M., Bieryla, Allyson, Buchhave, Lars A., Jenkins, Jon M., Kostov, Veselin B., Levine, Alan M., Lillo-Box, Jorge, Paegert, M., Rabus, Markus, Seager, S., Stassun, Keivan G., Ting, Eric B., Watanabe, David, Winn, Joshua N.
Format:	Preprint
Publié:	2024
Sujets:	Earth and Planetary Astrophysics
Accès en ligne:	Acceder al recurso
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author	Desai, Anmol Turtelboom, Emma V. Harada, Caleb K. Dressing, Courtney D. Rice, David R. Murphy, Joseph M. Akana Brinkman, Casey L. Chontos, Ashley Crossfield, Ian J. M. Dai, Fei Hill, Michelle L. Fetherolf, Tara Giacalone, Steven Howard, Andrew W. Huber, Daniel Isaacson, Howard Kane, Stephen R. Lubin, Jack MacDougall, Mason G. Mayo, Andrew W. Močnik, Teo Polanski, Alex S. Rice, Malena Robertson, Paul Rubenzahl, Ryan A. Van Zandt, Judah Weiss, Lauren M. Bieryla, Allyson Buchhave, Lars A. Jenkins, Jon M. Kostov, Veselin B. Levine, Alan M. Lillo-Box, Jorge Paegert, M. Rabus, Markus Seager, S. Stassun, Keivan G. Ting, Eric B. Watanabe, David Winn, Joshua N.
author_facet	Desai, Anmol Turtelboom, Emma V. Harada, Caleb K. Dressing, Courtney D. Rice, David R. Murphy, Joseph M. Akana Brinkman, Casey L. Chontos, Ashley Crossfield, Ian J. M. Dai, Fei Hill, Michelle L. Fetherolf, Tara Giacalone, Steven Howard, Andrew W. Huber, Daniel Isaacson, Howard Kane, Stephen R. Lubin, Jack MacDougall, Mason G. Mayo, Andrew W. Močnik, Teo Polanski, Alex S. Rice, Malena Robertson, Paul Rubenzahl, Ryan A. Van Zandt, Judah Weiss, Lauren M. Bieryla, Allyson Buchhave, Lars A. Jenkins, Jon M. Kostov, Veselin B. Levine, Alan M. Lillo-Box, Jorge Paegert, M. Rabus, Markus Seager, S. Stassun, Keivan G. Ting, Eric B. Watanabe, David Winn, Joshua N.
contents	We present and confirm TOI-1751 b, a transiting sub-Neptune orbiting a slightly evolved, solar-type, metal-poor star ($T_{eff} = 5996 \pm 110$ K, $log(g) = 4.2 \pm 0.1$, V = 9.3 mag, [Fe/H] = $-0.40 \pm 0.06$ dex) every 37.47 d. We use TESS photometry to measure a planet radius of $2.77_{-0.07}^{+0.15}~\rm{R_\oplus}$. We also use both Keck/HIRES and APF/Levy radial velocities (RV) to derive a planet mass of $14.5_{-3.14}^{+3.15} ~\rm{M_\oplus}$, and thus a planet density of $3.6 \pm 0.9 \, {\rm g}\,{\rm cm}^{-3}$. There is also a long-period ($\sim400~\rm{d}$) signal that is observed in only the Keck/HIRES data. We conclude that this long-period signal is not planetary in nature, and is likely due to the window function of the Keck/HIRES observations. This highlights the role of complementary observations from multiple observatories to identify and exclude aliases in RV data. Finally, we investigate potential compositions of this planet, including rocky and water-rich solutions, as well as theoretical irradiated ocean models. TOI-1751 b is a warm sub-Neptune, with an equilibrium temperature of $\sim 820$ K. As TOI-1751 is a metal-poor star, TOI-1751 b may have formed in a water-enriched formation environment. We thus favor a volatile-rich interior composition for this planet.
format	Preprint
id	arxiv_https___arxiv_org_abs_2402_07110
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	The TESS-Keck Survey. XVIII. A sub-Neptune and spurious long-period signal in the TOI-1751 system Desai, Anmol Turtelboom, Emma V. Harada, Caleb K. Dressing, Courtney D. Rice, David R. Murphy, Joseph M. Akana Brinkman, Casey L. Chontos, Ashley Crossfield, Ian J. M. Dai, Fei Hill, Michelle L. Fetherolf, Tara Giacalone, Steven Howard, Andrew W. Huber, Daniel Isaacson, Howard Kane, Stephen R. Lubin, Jack MacDougall, Mason G. Mayo, Andrew W. Močnik, Teo Polanski, Alex S. Rice, Malena Robertson, Paul Rubenzahl, Ryan A. Van Zandt, Judah Weiss, Lauren M. Bieryla, Allyson Buchhave, Lars A. Jenkins, Jon M. Kostov, Veselin B. Levine, Alan M. Lillo-Box, Jorge Paegert, M. Rabus, Markus Seager, S. Stassun, Keivan G. Ting, Eric B. Watanabe, David Winn, Joshua N. Earth and Planetary Astrophysics We present and confirm TOI-1751 b, a transiting sub-Neptune orbiting a slightly evolved, solar-type, metal-poor star ($T_{eff} = 5996 \pm 110$ K, $log(g) = 4.2 \pm 0.1$, V = 9.3 mag, [Fe/H] = $-0.40 \pm 0.06$ dex) every 37.47 d. We use TESS photometry to measure a planet radius of $2.77_{-0.07}^{+0.15}~\rm{R_\oplus}$. We also use both Keck/HIRES and APF/Levy radial velocities (RV) to derive a planet mass of $14.5_{-3.14}^{+3.15} ~\rm{M_\oplus}$, and thus a planet density of $3.6 \pm 0.9 \, {\rm g}\,{\rm cm}^{-3}$. There is also a long-period ($\sim400~\rm{d}$) signal that is observed in only the Keck/HIRES data. We conclude that this long-period signal is not planetary in nature, and is likely due to the window function of the Keck/HIRES observations. This highlights the role of complementary observations from multiple observatories to identify and exclude aliases in RV data. Finally, we investigate potential compositions of this planet, including rocky and water-rich solutions, as well as theoretical irradiated ocean models. TOI-1751 b is a warm sub-Neptune, with an equilibrium temperature of $\sim 820$ K. As TOI-1751 is a metal-poor star, TOI-1751 b may have formed in a water-enriched formation environment. We thus favor a volatile-rich interior composition for this planet.
title	The TESS-Keck Survey. XVIII. A sub-Neptune and spurious long-period signal in the TOI-1751 system
topic	Earth and Planetary Astrophysics
url	https://arxiv.org/abs/2402.07110

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