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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.20282 |
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| _version_ | 1866914992356327424 |
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| author | Tyler, Dakotah Petigura, Erik A. Rogers, James Lubin, Jack Seifhart, Andreas Bean, Jacob L. Brady, Madison Luque, Rafael |
| author_facet | Tyler, Dakotah Petigura, Erik A. Rogers, James Lubin, Jack Seifhart, Andreas Bean, Jacob L. Brady, Madison Luque, Rafael |
| contents | We present an analysis of 126 new radial velocity measurements from the MAROON-X spectrograph to investigate the TOI-1266 system, which hosts two transiting sub-Neptunes at 10.8 and 18.8 days. We measure masses of $M_{b}=4.01~\pm~0.55~M_{\oplus}$ for TOI-1266 b and $M_{c}=2.00~\pm~0.72~M_{\oplus}$ for TOI-1266 c. Our mass measurements agree with existing HARPS-N observations which we combined using a weighted average yielding masses for TOI-1266 b, and c of $M_{b}=4.10~\pm~0.43~M_{\oplus}$, $M_{c}=2.4~\pm~0.54~M_{\oplus}$ respectively. The combined dataset enabled a $\approx30\%$ improvement in mass precision. With bulk densities of $ρ_{b}$ = 1.25 $\pm$ 0.36 g cm$^{-3}$ and $ρ_{c}$ = 1.36 $\pm$ 0.31 g cm$^{-3}$, the planets are among the lowest density sub-Neptunes orbiting an M dwarf. They are both consistent with rocky cores surrounded by hydrogen helium envelopes. TOI-1266 c may also be consistent with a water-rich composition, but we disfavor that interpretation from an Occam's razor perspective. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_20282 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Revised Masses for Low Density Planets Orbiting the Disordered M-dwarf System TOI-1266 Tyler, Dakotah Petigura, Erik A. Rogers, James Lubin, Jack Seifhart, Andreas Bean, Jacob L. Brady, Madison Luque, Rafael Earth and Planetary Astrophysics We present an analysis of 126 new radial velocity measurements from the MAROON-X spectrograph to investigate the TOI-1266 system, which hosts two transiting sub-Neptunes at 10.8 and 18.8 days. We measure masses of $M_{b}=4.01~\pm~0.55~M_{\oplus}$ for TOI-1266 b and $M_{c}=2.00~\pm~0.72~M_{\oplus}$ for TOI-1266 c. Our mass measurements agree with existing HARPS-N observations which we combined using a weighted average yielding masses for TOI-1266 b, and c of $M_{b}=4.10~\pm~0.43~M_{\oplus}$, $M_{c}=2.4~\pm~0.54~M_{\oplus}$ respectively. The combined dataset enabled a $\approx30\%$ improvement in mass precision. With bulk densities of $ρ_{b}$ = 1.25 $\pm$ 0.36 g cm$^{-3}$ and $ρ_{c}$ = 1.36 $\pm$ 0.31 g cm$^{-3}$, the planets are among the lowest density sub-Neptunes orbiting an M dwarf. They are both consistent with rocky cores surrounded by hydrogen helium envelopes. TOI-1266 c may also be consistent with a water-rich composition, but we disfavor that interpretation from an Occam's razor perspective. |
| title | Revised Masses for Low Density Planets Orbiting the Disordered M-dwarf System TOI-1266 |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2410.20282 |