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These signals, caused by stellar oscillations and granulation, can usually be disregarded for main-sequence stars, as the stellar contributions average out when phase-folding the light curve. For evolved stars, however, the amplitudes of such signals are larger and the timescales similar to the transit duration of short-period planets, requiring that they be modelled alongside the transit. With the promise of TESS delivering of the order of \u223c105 light curves for stars along the red giant branch, there is a need for a method capable of describing the \u2018stellar noise\u2019 while simultaneously modelling an exoplanet\u2019s transit. In this work, a Gaussian process regression framework is used to model stellar light curves and the method validated by applying it to TESS-like artificial data. Furthermore, the method is used to characterize the stellar oscillations and granulation of a sample of well-studied Kepler low-luminosity red giant branch stars. The parameters determined are compared to equivalent ones obtained by modelling the power spectrum of the light curve. Results show that the method presented is capable of describing the stellar signals in the time domain and can also return an accurate and precise measurement of \u03bdmax, i.e. the frequency of maximum oscillation amplitude. Preliminary results show that using the method in transit modelling improves the precision and accuracy of the ratio between the planetary and stellar radius, Rp\/R\u22c6. The method\u2019s implementation is publicly available.1<\/jats:p>","DOI":"10.1093\/mnras\/stz2405","type":"journal-article","created":{"date-parts":[[2019,9,4]],"date-time":"2019-09-04T19:28:10Z","timestamp":1567625290000},"page":"5764-5774","source":"Crossref","is-referenced-by-count":37,"title":["Gaussian process modelling of granulation and oscillations in red giant stars"],"prefix":"10.1093","volume":"489","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2157-7146","authenticated-orcid":false,"given":"Filipe","family":"Pereira","sequence":"first","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"},{"name":"Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias da Universidade do Porto, Rua do Campo Alegre, P-4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4588-5389","authenticated-orcid":false,"given":"Tiago L","family":"Campante","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"},{"name":"Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias da Universidade do Porto, Rua do Campo Alegre, P-4169-007 Porto, Portugal"},{"name":"Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106-4030, USA"}]},{"given":"Margarida S","family":"Cunha","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"},{"name":"Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias da Universidade do Porto, Rua do Campo Alegre, P-4169-007 Porto, Portugal"}]},{"given":"Jo\u00e3o P","family":"Faria","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"}]},{"given":"Nuno C","family":"Santos","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"},{"name":"Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias da Universidade do Porto, Rua do Campo Alegre, P-4169-007 Porto, Portugal"}]},{"given":"Susana C C","family":"Barros","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"},{"name":"Departamento de F\u00edsica e Astronomia, Faculdade de Ci\u00eancias da Universidade do Porto, Rua do Campo Alegre, P-4169-007 Porto, Portugal"}]},{"given":"Olivier","family":"Demangeon","sequence":"additional","affiliation":[{"name":"Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3322-5279","authenticated-orcid":false,"given":"James S","family":"Kuszlewicz","sequence":"additional","affiliation":[{"name":"Max Planck Institute for Solar System Research, D-37077\u00a0G\u00f6ttingen, Germany"},{"name":"Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark"}]},{"given":"Enrico","family":"Corsaro","sequence":"additional","affiliation":[{"name":"INAF \u2013 Osservatorio Astrofisico di Catania, via S. 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