Matches in SemOpenAlex for { <https://semopenalex.org/work/W2891034157> ?p ?o ?g. }
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- W2891034157 abstract "We present ten high-precision light curves of four transits in the XO-1 planetary system, obtained using $u$, $g$, $r$, redshifted H$alpha$, $I$ and $z$ filters. We use these to measure the physical properties, orbital ephemeris, and a transmission spectrum of the planet covering the full optical wavelength range. We augment this with published HST/WFC3 observations to construct a transmission spectrum of the planet covering 0.37 to 1.65 $mu$m. Our best-fitting model to this spectrum is for a H$_2$/He-rich atmosphere containing water (3.05$sigma$ confidence), nitrogen-bearing molecules NH$_3$ and HCN (1.5$sigma$) and patchy cloud (1.3$sigma$). We find that adding the optical to the near-infrared data does not lead to more precise constraints on the planetary atmosphere in this case. We conduct a detailed investigation into the effect of stellar limb darkening on our results, concluding that the choice of limb darkening law and coefficients is unimportant; such conclusions may not hold for other systems so should be reassessed for all high-quality datasets. The planet radius we measure in the $g$-band is anomalously low and should be investigated with future observations at a higher spectral resolution. From the measured times of transit we determine an improved orbital ephemeris, calculate a lower limit on the modified stellar tidal quality factor of $Q_star^{,prime} > 10^{5.6}$, and rule out a previously postulated sinusoidal variation in the transit times." @default.
- W2891034157 created "2018-09-27" @default.
- W2891034157 creator A5006359624 @default.
- W2891034157 creator A5016970617 @default.
- W2891034157 creator A5017433254 @default.
- W2891034157 creator A5033693670 @default.
- W2891034157 creator A5048281509 @default.
- W2891034157 creator A5090456074 @default.
- W2891034157 date "2018-09-11" @default.
- W2891034157 modified "2023-10-04" @default.
- W2891034157 title "Physical properties and optical-infrared transmission spectrum of the giant planet XO-1 b" @default.
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