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In this paper we present an alternative approach for recovering the broadband transmission spectra using chromatic Doppler tomography based on physical modeling through the <jats:monospace>SOAP<\/jats:monospace> tool: CHOCOLATE (CHrOmatiC line prOfiLe tomogrAphy TEchnique). To validate the method and examine its performance, we use observational data recently obtained with the ESPRESSO instrument to retrieve the transmission spectra of the archetypal hot Jupiter HD 209458b. Our findings indicate that the recovered transmission spectrum is in good agreement with the results presented in previous studies, which used different methodologies to extract the spectrum, achieving similar precision. We explored several atmospheric models and inferred from spectral retrieval that a model containing H<jats:sub>2<\/jats:sub>O and NH<jats:sub>3<\/jats:sub> is the preferred scenario. The CHOCOLATE methodology is particularly interesting for future studies of exoplanets around young and active stars or moderate to fast rotating stars, considering <jats:monospace>SOAP<\/jats:monospace>\u2019s ability to model stellar active regions and the fact that the rotational broadening of spectral lines favors its application. Furthermore, CHOCOLATE will allow the broad transmission spectrum of a planet to be retrieved using high-S\/N, high-resolution spectroscopy with the next generation of extremely large telescopes, where low-resolution spectroscopy will not always be accessible.<\/jats:p>","DOI":"10.1051\/0004-6361\/202141826","type":"journal-article","created":{"date-parts":[[2021,10,13]],"date-time":"2021-10-13T09:22:46Z","timestamp":1634116966000},"page":"A23","source":"Crossref","is-referenced-by-count":4,"title":["Retrieving the transmission spectrum of HD 209458b using CHOCOLATE: a new chromatic Doppler tomography technique"],"prefix":"10.1051","volume":"657","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2341-3233","authenticated-orcid":false,"given":"E.","family":"Esparza-Borges","sequence":"first","affiliation":[]},{"given":"M.","family":"Oshagh","sequence":"additional","affiliation":[]},{"given":"N.","family":"Casasayas-Barris","sequence":"additional","affiliation":[]},{"given":"E.","family":"Pall\u00e9","sequence":"additional","affiliation":[]},{"given":"G.","family":"Chen","sequence":"additional","affiliation":[]},{"given":"G.","family":"Morello","sequence":"additional","affiliation":[]},{"given":"N. 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