Discovery of a new PG 1159 (GW Vir) pulsator
We report the discovery of pulsations in the spectroscopic PG 1159 type pre-white dwarf SDSS J075415.12 + 085232.18. Analysis of the spectrum by Werner et al. indicated T<SUB>eff</SUB> = 120 000 ± 10 000 K, log <i>g</i> = 7.0 ± 0.3, mass M = 0.52 ± 0.02M⊙, C/He = 0.33 by numb...
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| Autores principales: | , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2014
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/85433 |
| Aporte de: |
| Sumario: | We report the discovery of pulsations in the spectroscopic PG 1159 type pre-white dwarf SDSS J075415.12 + 085232.18. Analysis of the spectrum by Werner et al. indicated T<SUB>eff</SUB> = 120 000 ± 10 000 K, log <i>g</i> = 7.0 ± 0.3, mass M = 0.52 ± 0.02M⊙, C/He = 0.33 by number. We obtained time series images with the SOAR 4.1 m telescope and 2.1 m Otto Struve telescope at McDonald Observatory and show the star is also a variable PG 1159 type star, with dominant period of 525 s. |
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