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Cenizas nucleares y flujo de salida en la estrella eruptiva Nova Vul 1670
Tomasz Kamiński1, Karl M Menten2, Romuald Tylenda3
11] European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile [2] Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.
Nature
|March 25, 2015
Resumen
CK Vulpeculae también es vulpecula.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Evolución Estelar Evolución Estelar
Sus antecedentes:
- CK Vulpeculae (CK Vul) experimentó un estallido en 1670-1672, clasificado históricamente como Nova Vul 1670.
- Su naturaleza es objeto de debate debido a las similitudes con los 'transitorios rojos' luminosos, posiblemente resultantes de colisiones estelares, en lugar de las novas clásicas.
- Observaciones anteriores revelaron una nebulosa bipolar y una fuente de radio continua, pero no una contraparte estelar visible.
Objetivo del estudio:
- Para investigar la composición y el origen del material que rodea a CK Vulpeculae.
- Para determinar si CK Vulpeculae es una nova o un tipo diferente de evento estelar, como una fusión.
Principales métodos:
- Análisis de gas y polvo moleculares químicamente ricos que rodean a CK Vulpeculae.
- Examen de las relaciones isotópicas peculiares dentro del gas.
- Estimación de la masa del gas circundante, incluidas las incertidumbres en la conversión de las observaciones de CO.
Principales resultados:
- CK Vulpeculae está rodeado por gas molecular químicamente rico en un flujo de salida, junto con polvo.
- El gas exhibe proporciones isotópicas inusuales, lo que indica enriquecimiento de hidrógeno que quema "cenizas nucleares".
- La composición química y la masa estimada del gas son inconsistentes con una nova u otras explosiones estelares conocidas.
Conclusiones:
- Las características observadas de CK Vulpeculae no pueden explicarse por una nova clásica u otros eventos explosivos conocidos.
- La peculiar composición química y la sustancial masa de gas sugieren fuertemente que CK Vulpeculae es el remanente de una fusión entre dos estrellas.
- Los hallazgos reclasifican a CK Vulpeculae de una potencial nova a un probable evento de fusión estelar.
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