True mass and atmospheric composition of the non-transiting hot Jupiter HD 143105 b
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arXiv
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| Natura: | Preprint |
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2024
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| author | Finnerty, Luke Xin, Yinzi Xuan, Jerry W. Inglis, Julie Fitzgerald, Michael P Agrawal, Shubh Baker, Ashley Blake, Geoffrey A. Calvin, Benjamin Cetre, Sylvain Delorme, Jacques-Robert Doppman, Greg Echeverri, Daniel Horstman, Katelyn Hsu, Chih-Chun Jovanovic, Nemanja Liberman, Joshua López, Ronald A. Martin, Emily C. Mawet, Dimitri Morris, Evan Pezzato-Rovner, Jacklyn Ruffio, Jean-Baptiste Sappey, Ben Schofield, Tobias Skemer, Andrew Venenciano, Taylor Wallace, J. Kent Wallack, Nicole L. Wang, Jason J. Wang, Ji |
| author_facet | Finnerty, Luke Xin, Yinzi Xuan, Jerry W. Inglis, Julie Fitzgerald, Michael P Agrawal, Shubh Baker, Ashley Blake, Geoffrey A. Calvin, Benjamin Cetre, Sylvain Delorme, Jacques-Robert Doppman, Greg Echeverri, Daniel Horstman, Katelyn Hsu, Chih-Chun Jovanovic, Nemanja Liberman, Joshua López, Ronald A. Martin, Emily C. Mawet, Dimitri Morris, Evan Pezzato-Rovner, Jacklyn Ruffio, Jean-Baptiste Sappey, Ben Schofield, Tobias Skemer, Andrew Venenciano, Taylor Wallace, J. Kent Wallack, Nicole L. Wang, Jason J. Wang, Ji |
| contents | We present Keck/KPIC phase II $K$-band observations of the non-transiting hot Jupiter HD 143105 b. Using a cross-correlation approach, we make the first detection of the planetary atmosphere at $K_p = 185^{+11}_{-13}\rm km\ s^{-1}$ and an inferior conjunction time 2.5 hours before the previously-published ephemeris. The retrieved $K_p$ value, in combination with orbital period, mass of the host star, and lack of transit detection, gives an orbital inclination of $78^{\circ+2}_{-12}$ and a true planet mass of 1.23$\pm0.10\rm\ M_J$. While the equilibrium temperature of HD 143105 b is in the transition regime between non-inverted and inverted atmospheres, our analysis strongly prefers a non-inverted atmosphere. Retrieval analysis indicates the atmosphere of HD 143105 b is cloud-free to approximately 1 bar and dominated by H$_2$O absorption ($\log \rm H_2O_{MMR} = -3.9^{+0.8}_{-0.5}$), placing only an upper limit on the CO abundance ($\log \rm CO_{MMR} < -3.7$ at 95% confidence). We place no constraints on the abundances of Fe, Mg, or $^{13}$CO. From these abundances, we place an upper limit on the carbon-to-oxygen ratio for HD 143105 b, $\rm C/O < 0.2$ at 95% confidence, and find the atmospheric metallicity is approximately $0.1\times$ solar. The low metallicity may be responsible for the lack of a thermal inversion, which at the temperature of HD 143105 b would likely require significant opacity from TiO and/or VO. With these results, HD 143105 b joins the small number of non-transiting hot Jupiters with detected atmospheres. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_04552 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | True mass and atmospheric composition of the non-transiting hot Jupiter HD 143105 b Finnerty, Luke Xin, Yinzi Xuan, Jerry W. Inglis, Julie Fitzgerald, Michael P Agrawal, Shubh Baker, Ashley Blake, Geoffrey A. Calvin, Benjamin Cetre, Sylvain Delorme, Jacques-Robert Doppman, Greg Echeverri, Daniel Horstman, Katelyn Hsu, Chih-Chun Jovanovic, Nemanja Liberman, Joshua López, Ronald A. Martin, Emily C. Mawet, Dimitri Morris, Evan Pezzato-Rovner, Jacklyn Ruffio, Jean-Baptiste Sappey, Ben Schofield, Tobias Skemer, Andrew Venenciano, Taylor Wallace, J. Kent Wallack, Nicole L. Wang, Jason J. Wang, Ji Earth and Planetary Astrophysics We present Keck/KPIC phase II $K$-band observations of the non-transiting hot Jupiter HD 143105 b. Using a cross-correlation approach, we make the first detection of the planetary atmosphere at $K_p = 185^{+11}_{-13}\rm km\ s^{-1}$ and an inferior conjunction time 2.5 hours before the previously-published ephemeris. The retrieved $K_p$ value, in combination with orbital period, mass of the host star, and lack of transit detection, gives an orbital inclination of $78^{\circ+2}_{-12}$ and a true planet mass of 1.23$\pm0.10\rm\ M_J$. While the equilibrium temperature of HD 143105 b is in the transition regime between non-inverted and inverted atmospheres, our analysis strongly prefers a non-inverted atmosphere. Retrieval analysis indicates the atmosphere of HD 143105 b is cloud-free to approximately 1 bar and dominated by H$_2$O absorption ($\log \rm H_2O_{MMR} = -3.9^{+0.8}_{-0.5}$), placing only an upper limit on the CO abundance ($\log \rm CO_{MMR} < -3.7$ at 95% confidence). We place no constraints on the abundances of Fe, Mg, or $^{13}$CO. From these abundances, we place an upper limit on the carbon-to-oxygen ratio for HD 143105 b, $\rm C/O < 0.2$ at 95% confidence, and find the atmospheric metallicity is approximately $0.1\times$ solar. The low metallicity may be responsible for the lack of a thermal inversion, which at the temperature of HD 143105 b would likely require significant opacity from TiO and/or VO. With these results, HD 143105 b joins the small number of non-transiting hot Jupiters with detected atmospheres. |
| title | True mass and atmospheric composition of the non-transiting hot Jupiter HD 143105 b |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2412.04552 |