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• W4307439968 endingPage "A117" @default.
• W4307439968 startingPage "A117" @default.
• W4307439968 abstract "Transit timing variations (TTVs) can provide useful information on compact multi-planetary systems observed by transits by setting constraints on the masses and eccentricities of the observed planets. This is especially helpful when the host star is not bright enough for a radial velocity (RV) follow-up. However, in the past decade, a number of works have shown that TTV-characterised planets tend to have lower densities than planets characterised on the basis of RVs. Re-analysing 34 Kepler planets in the super-Earth to sub-Neptunes range using the RIVERS approach, we show that at least some of these discrepancies were due to the way transit timings were extracted from the light curve, as a result of their tendency to underestimate the TTV amplitudes. We recovered robust mass estimates (i.e. with low prior dependency) for 23 of the planets. We compared these planets the RV-characterised population and found that a large fraction of those that previously had unusually low density estimates were adjusted, allowing them to occupy a place on the mass-radius diagram much closer to the bulk of known planets. However, a slight shift toward lower densities remains, which could indicate that the compact multi-planetary systems characterised by TTVs are indeed composed of planets that are different from the bulk of the RV-characterised population. These results are especially important in the context of obtaining an unbiased view of the compact multi-planetary systems detected by Kepler , TESS, and the upcoming PLATO mission." @default.
• W4307439968 created "2022-11-01" @default.
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• W4307439968 date "2023-01-01" @default.
• W4307439968 modified "2023-10-05" @default.
• W4307439968 title "Removing biases on the density of sub-Neptunes characterised via transit timing variations" @default.
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• W4307439968 doi "https://doi.org/10.1051/0004-6361/202244132" @default.
• W4307439968 hasPublicationYear "2023" @default.
• W4307439968 type Work @default.

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