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Un período orbital de 62 minutos de viuda negra binario en un amplio triple jerárquico
Kevin B Burdge1,2, Thomas R Marsh3, Jim Fuller4,5
1Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA. kburdge@mit.edu.
Nature
|May 4, 2022
Resumen
Descubrimos ZTF J1406+1222, un sistema de pulsar viuda negra con una órbita de 62 minutos, desafiando los modelos existentes. Este sistema proporciona información sobre la física de las estrellas de neutrones y la evolución binaria.
Área de la Ciencia:
- La astronomía
- La astrofísica
- Sistemas de estrellas binarias
Sus antecedentes:
- Los púlsares de milisegundos en sistemas binarios cercanos ablan sus compañeros de baja masa.
- El púlsar "viuda negra" PSR J1959 + 2048 demuestra la emisión de alta energía de los púlsares que impactan con las compañeras.
- Estos sistemas son cruciales para estudiar las estrellas de neutrones masivas y probar la ecuación de estado de la estrella de neutrones.
Objetivo del estudio:
- Informar sobre el descubrimiento y las observaciones de ZTF J1406+1222, un nuevo candidato a viuda negra.
- Investigar las propiedades de este sistema y sus implicaciones para los modelos de evolución binaria.
- Para utilizar este sistema como una sonda para la física de estrellas de neutrones y canales de formación.
Principales métodos:
- Observaciones de ZTF J1406 + 1222, un amplio sistema triple jerárquico.
- Análisis del período orbital de 62 minutos y la variación significativa en el flujo óptico (más de diez veces).
- Caracterización de la amplia compañera terciaria como una rara estrella enana fría de baja metalicidad.
Principales resultados:
- Descubrimiento de ZTF J1406+1222, una viuda negra candidata con un período orbital de 62 minutos.
- El período orbital del sistema cae por debajo del mínimo previsto para los sistemas ricos en hidrógeno, desafiando los modelos evolutivos.
- El sistema exhibe una órbita de halo galáctico, lo que sugiere vías de formación específicas.
Conclusiones:
- ZTF J1406 + 1222 representa un caso extremo de interacción entre púlsar y compañero, empujando los límites de los modelos evolutivos actuales.
- Las características únicas del sistema ofrecen nuevas oportunidades para estudiar la física de las estrellas de neutrones, la evolución binaria y los mecanismos de formación.
- El estudio adicional de ZTF J1406 + 1222 puede proporcionar información sobre la física de las estrellas de neutrones y la población de estrellas de neutrones masivas.
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