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Una estrella de helio masiva con un campo magnético lo suficientemente fuerte como para formar un magnetar
Tomer Shenar1, Gregg A Wade2, Pablo Marchant3
1Anton Pannekoek Institute for Astronomy, University of Amsterdam, 1098 XH Amsterdam, Netherlands.
Science (New York, N.Y.)
|August 17, 2023
Resumen
Los investigadores identificaron una estrella de Wolf-Rayet en el sistema HD 45166 con un fuerte campo magnético. Se predice que esta estrella formará un magnetar, un tipo de estrella de neutrones altamente magnetizada, después de su explosión de supernova.
Área de la Ciencia:
- * Astrofísica
- * Evolución estelar
- * Formación de estrellas de neutrones
Sus antecedentes:
- * Los magnetares son estrellas de neutrones con campos magnéticos extremadamente fuertes, pero su origen sigue sin estar claro.
- * Las estrellas de Wolf-Rayet son estrellas calientes y ricas en helio caracterizadas por líneas de emisión en sus espectros.
- * Comprender las vías de formación de restos estelares exóticos como los magnetares es crucial para la astrofísica.
Objetivo del estudio:
- * Para investigar la naturaleza del sistema binario HD 45166.
- * Para determinar las propiedades de la estrella Wolf-Rayet dentro del sistema.
- * Para explorar un mecanismo de formación potencial para los magnetares.
Principales métodos:
- * Observaciones espectropolarimétricas del sistema HD 45166.
- * Reanálisis de los datos orbitales de archivo para el sistema binario.
- * Modelado y cálculos de la evolución estelar.
Principales resultados:
- * El sistema HD 45166 alberga una estrella de Wolf-Rayet con una masa de 2 masas solares.
- * Se detectó un campo magnético significativo de 43 kilogauss en la estrella Wolf-Rayet.
- * Las predicciones de evolución estelar indican una explosión de supernova que conduce a un remanente de magnetar.
Conclusiones:
- * La estrella de Wolf-Rayet observada posee suficiente fuerza de campo magnético para formar un magnetar.
- * Un escenario plausible de formación para esta estrella magnetizada de Wolf-Rayet es la fusión de dos estrellas de helio de menor masa.
- * Este estudio proporciona una vía potencial para la formación de magnetares de estrellas masivas.
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