File:Gill 2020 ApJL 898 L11.pdf
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English: We report the discovery of NGTS-11 b (=TOI-1847b), a transiting Saturn in a 35.46 day orbit around a mid K-type star (${T}_{\mathrm{eff $ = 5050 ± 80 K). We initially identified the system from a single-transit event in a TESS full-frame image light curve. Following 79 nights of photometric monitoring with an NGTS telescope, we observed a second full transit of NGTS-11 b approximately one year after the TESS single-transit event. The NGTS transit confirmed the parameters of the transit signal and restricted the orbital period to a set of 13 discrete periods. We combined our transit detections with precise radial-velocity measurements to determine the true orbital period and measure the mass of the planet. We find NGTS-11 b has a radius of $0.817{\pm }_{0.032}^{0.028}$ ${R}_{\mathrm{Jup |
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$, a mass of $0.344{\pm }_{0.073}^{0.092}$ ${M}_{\mathrm{Jup}}$, and an equilibrium temperature of just $435{\pm }_{32}^{34}$ K, making it one of the coolest known transiting gas giants. NGTS-11 b is the first exoplanet to be discovered after being initially identified as a TESS single-transit event, and its discovery highlights the power of intense photometric monitoring in recovering longer-period transiting exoplanets from single-transit events.}}
|date=2020-07-20 |source=https://iopscience.iop.org/article/10.3847/2041-8213/ab9eb9 https://doi.org/10.3847/2041-8213/ab9eb9 |author=Samuel Gill et al. |permission= |other versions= }}
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