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Detección de una estrella progenitora supergigante roja de una supernova de meseta tipo II
Stephen J Smartt1, Justyn R Maund, Margaret A Hendry
1Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK. sjs@ast.cam.ac.uk
Science (New York, N.Y.)
|January 24, 2004
Resumen
Los astrónomos identificaron la estrella supergigante roja que explotó como supernova 2003gd en la galaxia M74. Este descubrimiento confirma que las supergigantes rojas frías son los progenitores de las supernovas de meseta tipo II.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Evolución Estelar Evolución Estelar
Sus antecedentes:
- Las supernovas son poderosas explosiones estelares.
- Las supernovas de meseta tipo II son una clase específica de supernovas.
- La identificación de las estrellas progenitoras de las supernovas es crucial para comprender la evolución estelar.
Objetivo del estudio:
- Para identificar la estrella progenitora de la supernova 2003gd.
- Para confirmar los modelos teóricos de la evolución estelar y los progenitores de supernovas.
- Proporcionar evidencia observacional para las supergigantes rojas como progenitores de las supernovas de meseta tipo II.
Principales métodos:
- Utilizó las observaciones del Telescopio Espacial Hubble (HST) y el Telescopio Gemini.
- Imagen de la galaxia espiral M74 antes del evento de la supernova.
- Confirmó la posición de la supernova coincidiendo con una sola estrella supergigante roja resuelta.
Principales resultados:
- Descubrió una estrella supergigante roja como el progenitor de la supernova 2003gd.
- Se determinó que la masa de la estrella progenitora es de 8(+4)(-2) masas solares.
- Confirmó la coincidencia posicional entre la supernova y la supergigante roja identificada.
Conclusiones:
- El estudio confirma que las supergigantes rojas frías son las estrellas progenitoras inmediatas de las supernovas de meseta tipo II.
- Los hallazgos apoyan los modelos actuales de evolución estelar.
- Proporciona una fuerte evidencia observacional para las teorías progenitoras de supernovas.
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