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Interpreting and predicting the yield of transit surveys : Giant planets in the OGLE fields
| Content Provider | Semantic Scholar |
|---|---|
| Author | Fressin, François Guillot, Tristan Morello, Vincent Pont, F. W. A. De |
| Copyright Year | 2017 |
| Abstract | Transiting extrasolar planets are now discovered jointly b y photometric surveys and by radial velocimetry, allowing measurements of their radius and mass. We want to determine w hether the di fferent data sets are compatible between themselves and with models of the evolution of extrasolar planet s. We further want to determine whether to expect a populatio n of dense Jupiter-mass planets to be detected by future more sen sitiv transit surveys. We simulate directly a population o f stars corresponding to the OGLE transit survey and assign them pla netary companions based on a list of 153 extrasolar planets d iscovered by radial velocimetry. We use a model of the evolutio n and structure of giant planets that assumes that they are ma d of hydrogen and helium and of a variable fraction of heavy ele m nts (between 0 and 100 M⊕). The output list of detectable planets of the simulations is compared to the real detection s. We confirm that the radial velocimetry and photometric sur vey data sets are compatible within the statistical errors, ass uming that planets with periods between 1 and 2 days are appro ximately 5 times less frequent than planets with periods betwe en 2 and 5 days. We show that evolution models fitting present observational constraints predict a lack of small giant pla nets with large masses. As a side result of the study, we ident ify two distinct populations of planets: those with short periods ( P < 10d), which are only found in orbit around metal-rich stars with [Fe/H] >∼ −0.07, and those on longer orbits ( P > 10d), for which the metallicity bias is less marked. We further c onfirm the relative absence of low-mass giant planets at small orbital d stances. Testing these results and the underlying planet ary volution models requires the detection of a statistically signi ficant number of transiting planets, which should be provide d over the next few years by continued ground-based photometric surve ys, the space missions CoRoT and Kepler, and combined radial velocity measurements. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://hal.archives-ouvertes.fr/hal-00140833/document |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Field electron emission Helium Hydrogen Kepler Molecular orbital Ocular orbit Photometry Population Radial (radio) Radial basis function Religious Missions Simulation Stars, Celestial Velocity (software development) |
| Content Type | Text |
| Resource Type | Article |
