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Participant |
Garcia-Berro, Enrique | |||||||
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Institution |
Universitat Politecnica de Catalunya - c/Esteve Terrades, 5 - Castelldefels - - Spain | |||||||
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Session |
WD1-3 |
Accepted |
Yes |
Order |
1R |
Time |
14:30 | 10' |
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Talk |
Oral abstract |
Title |
A Brief Introduction To Magnetic White Dwarfs: The Current Status | |||||
| Coauthors | Kepler, S.O. | |||||||
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Abstract |
In this brief introductory talk we introduce the current status and paradigms of magnetic fields in white dwarfs, from both the theoretical and observational points of view. |
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Pdf file |
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Session |
BN4 |
Accepted |
Yes |
Order |
2 |
Time |
14:50 | 20' |
|
Talk |
Oral abstract |
Title |
White Dwarf Dynamical Interactions | |||||
| Coauthors | Lorén-Aguilar, Pablo | |||||||
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Abstract |
Despite their importance, we still do not know exactly which stellar systems produce Type Ia supernovae. However, we do know the physical mechanism that powers the explosion. Type Ia supernovae originate from the explosion of carbon-oxygen white dwarfs. It has long been suggested that a white dwarf in a binary system --- with either another white dwarf, through the so-called double-degenerate channel, or a main-sequence or red giant companion through the single-degenerate channel --- could give rise to a Type Ia supernova event. Observational evidence favors the double-degenerate channel, but significant discrepancies exist between observations and theory. I describe the several scenarios which involve interacting white dwarfs, like the double-degenerate, the core-degenerate and the white dwarf collision scenarios. |
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Pdf file |
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Session |
PT4 |
Accepted |
Yes |
Order |
7 |
Time |
17:10 | 20' |
|
Talk |
Oral abstract |
Title |
White Dwar Constraints On A Secular Varying Gravitational Constant | |||||
| Coauthors | Torres, S.; Althaus, L.G. | |||||||
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Abstract |
A secular variation of the gravitational constant modifies the structure and evolutionary timescales of white dwarfs. Using an state-of-the-art stellar evolutionary code we compute white dwarf cooling sequences with a varying G. White dwarf evolution is computed in a self-consistent way, including the most up-to-date physical inputs, non-gray model atmospheres and a detailed core chemical composition that results from the calculation of the full evolution of progenitor stars. These fully evolutionary cooling sequences offer the possibility of measuring a hypothetical variation of the gravitational constant, by comparing our theoretical predictions with the observational data, and in particular with the observed luminosity function of disk white dwarfs. |
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Pdf file |
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