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Implicaciones de una distancia VLBI al doble púlsar J0737-3039A/B
A T Deller1, M Bailes, S J Tingay
1Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Mail H39, Post Office Box 218, Hawthorn, VIC 3122, Australia. adeller@astro.swin.edu.au
Science (New York, N.Y.)
|February 7, 2009
Resumen
Se obtuvieron mediciones precisas de distancia y movimiento para el doble púlsar J0737-3039A/B utilizando VLBI. Esto permite pruebas de gran precisión de las teorías gravitacionales, limitando los modelos de radiación 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 doble púlsar J0737-3039A/B es crucial para probar la gravedad de campo fuerte.
- Los datos precisos de distancia y movimiento relativo son esenciales para pruebas gravitacionales precisas.
Objetivo del estudio:
- Para determinar la distancia precisa y la velocidad transversal del sistema de doble púlsar.
- Para mejorar la precisión de las pruebas de las teorías gravitacionales utilizando datos de cronometraje de púlsares.
Principales métodos:
- Se emplearon observaciones de interferometría de línea de base muy larga (VLBI).
- Se utilizaron datos de cronometraje de pulsares que abarcan una década.
Principales resultados:
- Se determinó que la distancia a PSR J0737-3039A/B es de 1150(-160)(+220) parsecs.
- Se confirmó una baja velocidad transversal de aproximadamente 9 km/s.
- Estas mediciones mejoran significativamente las estimaciones anteriores.
Conclusiones:
- Los datos refinados permiten pruebas con un nivel de incertidumbre del 0,01% de las teorías de emisión de radiación gravitacional.
- Se pueden imponer restricciones estrictas a las teorías que predicen la radiación gravitacional dipolar.
- Se proporcionan nuevos conocimientos sobre la formación del sistema y las fuentes de emisión de alta energía.
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