| dc.creator | Romero, Alejandra Daniela | |
| dc.creator | Córsico, Alejandro Hugo | |
| dc.creator | Althaus, Leandro Gabriel | |
| dc.creator | García Berro, Enrique | |
| dc.date | 2009 | |
| dc.date | 2022-06-30T16:00:23Z | |
| dc.date.accessioned | 2023-07-15T04:42:49Z | |
| dc.date.available | 2023-07-15T04:42:49Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/138655 | |
| dc.identifier | issn:1743-9213 | |
| dc.identifier | issn:1743-9221 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7470601 | |
| dc.description | Hot DQ white dwarfs constitute a new class of white dwarf stars, uncovered recently within the framework of SDSS project. There exist nine of them, out of a total of several thousands white dwarfs spectroscopically identified. Recently, three hot DQ white dwarfs have been reported to exhibit photometric variability with periods compatible with pulsation g -modes. In this contribution, we presented the results of a non-adiabatic pulsation analysis of the recently discovered carbon-rich hot DQ white dwarf stars. Our study relies on the full evolutionary models of hot DQ white dwarfs recently developed by Althaus et al . (2009), that consistently cover the whole evolution from the born-again stage to the white dwarf cooling track. Specifically, we performed a stability analysis on white dwarf models from stages before the blue edge of the DBV instability strip ( T eff ≈ 30000 K) until the domain of the hot DQ white dwarfs (18000-24000 K), including the transition DB→hot DQ white dwarf. We explore evolutionary models with M * = 0.585 M ⊙ and M * = 0.87 M ⊙ , and two values of thickness of the He-rich envelope ( M He = 2 × 10 −7 M * and M He = 10 −8 M * ). | |
| dc.description | Instituto de Astrofísica de La Plata | |
| dc.format | application/pdf | |
| dc.format | 370-370 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by/4.0/ | |
| dc.rights | Creative Commons Attribution 4.0 International (CC BY 4.0) | |
| dc.subject | Astronomía | |
| dc.subject | Física | |
| dc.subject | white dwarfs | |
| dc.subject | photometric variability | |
| dc.title | Hot DQ white dwarfs: a pulsational test of the mixing scenario for their formation | |
| dc.type | Articulo | |
| dc.type | Comunicacion | |
