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Un púlsar binario en una órbita de 53 minutos

Z Pan^1,2,3,4, J G Lu^1,2,3,4, P Jiang^5,6,7,8

¹National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China.

|June 20, 2023

Resumen

Los investigadores descubrieron un nuevo púlsar araña, PSR J1953+1844 (M71E), con un período orbital inusualmente corto y un compañero de baja masa. Este hallazgo ayuda a cerrar la brecha entre los diferentes tipos de púlsares y comprender su evolución.

Área de la Ciencia:

* Astronomía y astrofísica
* Física de objetos compactos
* Sistemas de estrellas binarias

Sus antecedentes:

* Los púlsares araña son estrellas de neutrones con estrellas compañeras cercanas, lo que lleva a períodos de rotación de milisegundos y órbitas cortas.
* Estos sistemas son cruciales para comprender la evolución de los púlsares, los efectos de la irradiación y la formación de estrellas de neutrones.
* Los púlsares viudas negras tienen compañeros de muy baja masa, que potencialmente evolucionaron de los púlsares redback.

Objetivo del estudio:

* Para buscar y caracterizar púlsares de milisegundos con compañeros de masa moderada y períodos orbitales muy cortos.
* Para investigar el vínculo evolutivo entre diferentes tipos de púlsares.
* Para informar del descubrimiento de un nuevo sistema binario de pulsares de milisegundos.

Principales métodos:

* Observaciones por radio del púlsar binario de milisegundos PSR J1953+1844 (M71E).
* Análisis del período orbital y la masa de la estrella compañera.
* Detección y localización de la fuente de rayos X.

Principales resultados:

* El descubrimiento de PSR J1953+1844 (M71E), un púlsar binario de milisegundos.
* Período orbital de 53,3 minutos.
* La estrella compañera tiene una masa de aproximadamente 0,07 M.
* Situado cerca del centro del cúmulo globular M71.

Conclusiones:

* El sistema descubierto llena un vacío en la población esperada de púlsares.
* Proporciona nuevos conocimientos sobre la evolución de los púlsares araña y sus compañeros.
* Contribuye a la comprensión de la diversidad de las binarias de estrellas de neutrones.

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