<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars"^^ . "This dissertation focuses on classical Cepheids and RR Lyrae stars as tracers of the recent star formation and the early assembly of the Milky Way, respectively.\r\n\r\nI use data from the Gaia spacecraft to search for classical Cepheids in Galactic open clusters. I confirm (reject) several Cepheid-cluster associations considered in previous studies as bona-fide and identify new potential cluster Cepheid candidates. I also study the feasibility of using young cluster ages as tests of the Cepheid period-age relation, and conclude that their usage still faces difficulties due to their sparsely populated red giant branches, their stochastically sampled main-sequence turn-offs, and their quick dissolution.\r\n\r\nI combine publicly available and proprietary data to study outer halo RR Lyrae stars, in the context of the Halo Outskirts with Variable Stars (HOWVAST) survey. Using Dark Energy Camera data, I search for distant halo RR Lyrae stars and detect ∼ 500 candidates, ∼ 25% of which are not reported in the literature, and 11 of which are new discoveries beyond 100 kpc. I use their pulsation properties and radial distribution to investigate the role that the accretion of satellites play in the formation and shape of the halo. Finally, I derive atmospheric parameters, chemical abundances, and kinematics for a sample of distant halo RR Lyrae stars using Magellan Inamori Kyocera Echelle spectra. I speculate about their origin, looking for hints of their association with satellites and stellar streams, and conclude that the accretion of sub-haloes contributes significantly to building up the outer halo.\r\n\r\nThe results of this thesis confirm the pivotal role of variable stars as tools to unveil the Milky Way’s evolution."^^ . "2022" . . . . . . . "Gustavo Enrique"^^ . "Medina Toledo"^^ . "Gustavo Enrique Medina Toledo"^^ . . . . . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars (PDF)"^^ . . . "PhD_Thesis_GustavoMedinaToledo_submitted.pdf"^^ . . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Unveiling the Milky Way’s History Using Young & Old Population Variable Stars (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #32368 \n\nUnveiling the Milky Way’s History Using Young & Old Population Variable Stars\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . . . "530 Physik"@de . "530 Physics"@en . .