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- W4225758506 abstract "We present the discovery of TOI-2136b, a sub-Neptune planet transiting every 7.85 days a nearby M4.5V-type star, identified through photometric measurements from the TESS mission. The host star is located $33$ pc away with a radius of $R_{ast} = 0.34pm0.02 R_{odot}$, a mass of $0.34pm0.02 M_{odot}$ and an effective temperature of $rm 3342pm100 K$. We estimate its stellar rotation period to be $75pm5$ days based on archival long-term photometry. We confirm and characterize the planet based on a series of ground-based multi-wavelength photometry, high-angular-resolution imaging observations, and precise radial velocities from CFHT/SPIRou. Our joint analysis reveals that the planet has a radius of $2.19pm0.17 R_{oplus}$, and a mass measurement of $6.4pm2.4 M_{oplus}$. The mass and radius of TOI2136b is consistent with a broad range of compositions, from water-ice to gas-dominated worlds. TOI-2136b falls close to the radius valley for low-mass stars predicted by the thermally driven atmospheric mass loss models, making it an interesting target for future studies of its interior structure and atmospheric properties." @default.
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- W4225758506 date "2022-05-30" @default.
- W4225758506 modified "2023-10-14" @default.
- W4225758506 title "<i>TESS</i> discovery of a sub-Neptune orbiting a mid-M dwarf TOI-2136" @default.
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