| dc.contributor | Tappert, Claus | |
| dc.contributor | UNIVERSIDAD DE VALPARAISO | |
| dc.creator | Hernández Padilla, Mercedes Stephania | |
| dc.date | 2021-08-27T16:06:37Z | |
| dc.date | 2022-08-17T21:48:14Z | |
| dc.date | 2021-08-27T16:06:37Z | |
| dc.date | 2022-08-17T21:48:14Z | |
| dc.date | 2021 | |
| dc.date.accessioned | 2023-08-22T08:56:28Z | |
| dc.date.available | 2023-08-22T08:56:28Z | |
| dc.identifier | 21170070 | |
| dc.identifier | https://hdl.handle.net/10533/252933 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/8334794 | |
| dc.description | In this work, I briefly present the big picture of binary stars, their impact on dif- ferent areas of astronomy, and the physical mechanisms that govern their evolution from the initial configuration of a main-sequence binary system to all possible out- comes, covering systems as interesting as cataclysmic variables and explosions as important as supernovae Ia.
Establishing a large sample of post common envelope binaries consisting of a white dwarf plus an intermediate mass companion star of spectral type AFGK of- fers the potential to provide new constraints on theoretical models of close binaries formation and evolution. Here we present a detailed analysis of five new systems, TYC 4700–815–1, TYC 1380–957–1, TYC 4962–1205–1, TYC 110–755–1, and TYC 3858– 1215–1.
Based on radial velocity measurements we find the orbital periods of the five systems to be between 0.858 and 2.466 days. In addition, spectroscopy obtained with the Hubble Space Telescope of TYC 110-755-1 allowed us to measure the mass of the white dwarf in this system (0.78 M⊙). We furthermore analysed photometry from the Transiting Exoplanet Survey Satellite (TESS) of two systems and find in both cases the secondary stars to be magnetically extremely active. Differences in the photometric and spectroscopic periods of TYC 110-755-1 indicate that the secondary in this system is differentially rotating.
Finally, modelling the past and future of the systems, we find a wide range of possible evolutionary histories for the five systems and identify no signs for differ- ences in common envelope evolution compared to post common envelope binaries with lower mass secondary stars. While TYC 4700-815-1 and TYC 3858-1215-1 will run into dynamically unstable mass transfer that will cause the two stars in the bi- nary to merge, TYC 110-755-1 and TYC 4961-1205-1 are progenitors of cataclysmic variable systems with evolved donor stars. Finally, TYC 1380-957-1 may appear as super soft source before becoming a rather typical cataclysmic variable star. | |
| dc.format | application/pdf | |
| dc.relation | instname: Conicyt | |
| dc.relation | reponame: Repositorio Digital RI2.0 | |
| dc.relation | info:eu-repo/grantAgreement//21170070 | |
| dc.relation | info:eu-repo/semantics/dataset/hdl.handle.net/10533/93488 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
| dc.subject | Ciencias Naturales | |
| dc.subject | Ciencias Físicas | |
| dc.subject | Astronomía | |
| dc.title | Constraints on evolutionary pathways towards supernovae Ia | |
| dc.type | info:eu-repo/semantics/doctoralThesis | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | Tesis | |
