Busque entre los 156529 recursos disponibles en el repositorio
Mostrar el registro sencillo del ítem
dc.date.accessioned | 2021-09-20T16:01:25Z | |
dc.date.available | 2021-09-20T16:01:25Z | |
dc.date.issued | 2019 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/125194 | |
dc.description.abstract | We homogeneously analyse ∼3.2 × 10⁵ photometric measurements for ∼1100 transit lightcurves belonging to 17 exoplanet hosts. The photometric data cover 16 years 2004–2019 and include amateur and professional observations. Old archival lightcurves were reprocessed using up-to-date exoplanetary parameters and empirically debiased limb-darkening models. We also derive self-consistent transit and radial-velocity fits for 13 targets. We confirm the nonlinear TTV trend in the WASP-12 data at a high significance, and with a consistent magnitude. However, Doppler data reveal hints of a radial acceleration about ( − 7.5 ± 2.2) m/s/yr, indicating the presence of unseen distant companions, and suggesting that roughly 10 per cent of the observed TTV was induced via the light-travel (or Roemer) effect. For WASP-4, a similar TTV trend suspected after the recent TESS observations appears controversial and model-dependent. It is not supported by our homogeneus TTV sample, including 10 ground-based EXPANSION lightcurves obtained in 2018 simultaneously with TESS. Even if the TTV trend itself does exist in WASP-4, its magnitude and tidal nature are uncertain. Doppler data cannot entirely rule out the Roemer effect induced by possible distant companions. | en |
dc.format.extent | 1294-1312 | es |
dc.language | en | es |
dc.subject | Planetary systems | es |
dc.subject | Techniques: photometric | es |
dc.subject | Techniques: radial velocities | es |
dc.subject | Methods: data analysis | es |
dc.subject | Methods: statistical | es |
dc.subject | Surveys | es |
dc.title | Homogeneously derived transit timings for 17 exoplanets and reassessed TTV trends for WASP-12 and WASP-4 | en |
dc.type | Articulo | es |
sedici.identifier.other | arXiv:1908.04505 | es |
sedici.identifier.other | doi:10.1093/mnras/stz2620 | es |
sedici.identifier.issn | 0035-8711 | es |
sedici.identifier.issn | 1365-2966 | es |
sedici.creator.person | Fernández Lajús, Eduardo Eusebio | es |
sedici.creator.person | Di Sisto, Romina Paula | es |
sedici.subject.materias | Ciencias Astronómicas | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto de Astrofísica de La Plata | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Monthly Notices of the Royal Astronomical Society | es |
sedici.relation.journalVolumeAndIssue | vol. 490, no. 1 | es |