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Una gran edad para el púlsar B1757-24 desde un límite superior en su movimiento propio
1Center for Space Research, Massachusetts Institute of Technology, Cambridge 02139, USA. bmg@space.mit.edu
Nature
|July 26, 2000
Resumen
Las edades de los púlsares a menudo se subestiman. La edad característica del púlsar B1757-24 es de 16.000 años, pero las observaciones sugieren que su verdadera edad es mucho mayor, posiblemente 170.000 años.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Investigación de los púlsares en la investigación de los púlsares.
Sus antecedentes:
- La "edad característica" de los púlsares se utiliza comúnmente para estimar su verdadera edad.
- Esta suposición ha llevado a discrepancias, como los púlsares que carecen de restos de supernova asociados a pesar de las pequeñas edades características.
Objetivo del estudio:
- Para investigar la discrepancia entre las edades características y las verdaderas edades de los púlsares.
- Para determinar la edad exacta del púlsar B1757-24 y sus implicaciones para la estimación de la edad del púlsar.
Principales métodos:
- Observando la nebulosa que rodea al púlsar B1757-24.4.
- Medición del movimiento propio del púlsar.
- Analizando la posición del púlsar en relación con su remanente de supernova.
Principales resultados:
- El movimiento propio del púlsar B1757-24 se limitó a menos de 25 millones de años.
- Esto implica una edad mínima de 39.000 años para el púlsar.
- Análisis adicionales sugieren una verdadera edad de hasta 170.000 años, superando significativamente su edad característica.
Conclusiones:
- Las edades características de los púlsares pueden subestimar significativamente sus verdaderas edades.
- El caso del púlsar B1757-24 pone de relieve la necesidad de métodos revisados en la determinación de la edad del púlsar.
- Las discrepancias en las propiedades de los púlsares sugieren un problema sistemático con la hipótesis de edad característica.
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