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Pruebas de la relatividad general de la sincronización del doble púlsar
M Kramer1, I H Stairs, R N Manchester
1University of Manchester, Jodrell Bank Observatory, Macclesfield SK11 9DL, UK. mkramer@jb.man.ac.uk
Science (New York, N.Y.)
|September 16, 2006
Resumen
El sistema de doble púlsar PSR J0737-3039A/B proporciona la prueba más precisa de la relatividad general hasta la fecha. Su dinámica orbital única confirma la teoría de Einstein con una precisión del 0,05%, avanzando la física gravitacional.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Física de la gravitación Física gravitacional es la física de las fuerzas gravitacionales.
Sus antecedentes:
- El sistema de doble púlsar PSR J0737-3039A/B es único ya que ambas estrellas de neutrones son púlsares de radio detectables.
- Exhibe velocidades y aceleraciones orbitales más altas que otros púlsares binarios, lo que lo hace ideal para pruebas de gravedad de campo fuerte.
Objetivo del estudio:
- Para realizar observaciones de tiempo de precisión del sistema de doble púlsar.
- Para realizar pruebas de campo fuerte de la relatividad general y teorías alternativas de la gravedad.
Principales métodos:
- Utilizó 2,5 años de observaciones de tiempo de precisión de PSR J0737-3039A/B.
- Se midieron correcciones relativistas al movimiento orbital kepleriano utilizando una relación de masa independiente de la teoría.
Principales resultados:
- Logró la prueba más precisa de la relatividad general hasta la fecha, con el parámetro post-kepleriano 's' de acuerdo con las predicciones dentro del 0,05% de incertidumbre.
- Determinó una velocidad transversal extremadamente pequeña para el centro de masa del sistema.
Conclusiones:
- El sistema de doble púlsar ofrece oportunidades sin precedentes para futuras pruebas de teorías gravitacionales, superando potencialmente las pruebas actuales del sistema solar.
- Los hallazgos sugieren escenarios de formación alternativos para el segundo púlsar nacido, desafiando el colapso del núcleo de la hipótesis de una estrella de helio.
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