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Updated: May 6, 2026

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External Excitation of Neurons Using Electric and Magnetic Fields in One- and Two-dimensional Cultures
Published on: May 7, 2017
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Evolución de la estructura del campo magnético del pulsar del Cangrejo
Andrew Lyne1, Francis Graham-Smith, Patrick Weltevrede
1Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK.
Resumen
El púlsar del Cangrejo.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Física de las estrellas de neutrones Física de las estrellas de neutrones
Sus antecedentes:
- Los púlsares son estrellas de neutrones giratorias conocidas por sus formas de pulso estables.
- El púlsar del Cangrejo exhibe cambios seculares en su perfil de pulso de radio.
- Estos cambios incluyen una mayor separación entre los componentes de pulso principal e interpulso.
Objetivo del estudio:
- Investigar los cambios seculares en el perfil de pulso de radio del púlsar del Cangrejo.
- Determinar las implicaciones de estos cambios para la evolución del campo magnético del púlsar.
- Explique el observado comportamiento de giro hacia abajo del púlsar.
Principales métodos:
- Análisis de 22 años de datos de perfiles de pulsos de radio del púlsar Crab.
- Medición de la tasa de cambio en la separación de los componentes.
- Modelado de la evolución del campo magnético dentro de la estrella de neutrones.
Principales resultados:
- Se observó un aumento constante en la separación pulso-interpulso principal a 0.62 ° ± 0.03 ° por siglo.
- Se detectaron cambios seculares en las fortalezas relativas de los componentes del perfil.
- Movimiento inferido del eje del dipolo magnético hacia el ecuador estelar.
Conclusiones:
- La evolución de la estructura del campo magnético ofrece una explicación para la anormal velocidad de giro hacia abajo del púlsar del Cangrejo.
- Esta evolución del campo magnético desafía los modelos simples de frenado para los púlsares.
- Los hallazgos proporcionan nuevos conocimientos sobre la física de las estrellas de neutrones y la dinámica del campo magnético.
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