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2025-07-08
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info:eu-repo/semantics/openAccess
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El estudio de la evolución espectral de los objetos compactos es una de las formas en las que podemos obtener información de los objetos que se encuentran en la Vía Láctea y galaxias cercanas. En este caso, las estrellas de neutrones siguen siendo un misterio para la astrofísica moderna dado que desconocemos todavía su estructura interna y por ello se realizan diversos estudios con la intención de descubrir la física detrás de estos objetos.
En este trabajo nos centramos en Aql X-1, un sistema binario de rayos X poco masivo conocido por ser una de las fuentes más utilizadas para este tipo de estudios debido a su recurrencia de episodios de actividad o outburst que son muy monitorizados. Trabajamos con los datos de rayos X obtenidos por NICER del outburst de septiembre de 2024, obteniendo los parámetros físicos. Además, desarrollamos un método automático para modelizar los datos con diversos modelos, agilizando los tiempos necesarios para cada observación manual.
Tenemos como intención obtener el radio de la estrella de neutrones o el radio del disco de acreción, dependiendo del modelo, además de conseguir información sobre la linea de emisión del hierro.
The study of the spectral evolution of compact objects is one of the methods that we can use in order to obtain information of these kinds of objects located in the Milky Way and nearby galaxies. In this case, neutron stars remain a mystery for modern astrophysics since we still don’t know their internal structure. For that reason, we continue to study them in order to understand the physics behind these objects. In this work we focus on Aql X-1, a Low Mass X-ray Binary known for being one of the sources most studied. The reason is that this source has recurrent times of activity (outburst) each year which are typically densely monitored. We work with the X-ray data obtained by NICER during the outburst in September 2024 and obtain the physical parameters of this system. Also, we develop an automatic method to fit the data with various models and compare them, speeding up the time needed to do each modelization manually. We intend to obtain the radius of the neutron star or the accretion disk, depending on the model, as well as get information about the iron emission line.
The study of the spectral evolution of compact objects is one of the methods that we can use in order to obtain information of these kinds of objects located in the Milky Way and nearby galaxies. In this case, neutron stars remain a mystery for modern astrophysics since we still don’t know their internal structure. For that reason, we continue to study them in order to understand the physics behind these objects. In this work we focus on Aql X-1, a Low Mass X-ray Binary known for being one of the sources most studied. The reason is that this source has recurrent times of activity (outburst) each year which are typically densely monitored. We work with the X-ray data obtained by NICER during the outburst in September 2024 and obtain the physical parameters of this system. Also, we develop an automatic method to fit the data with various models and compare them, speeding up the time needed to do each modelization manually. We intend to obtain the radius of the neutron star or the accretion disk, depending on the model, as well as get information about the iron emission line.
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Jurado I López, Álex. Trabajo de Fin de Grado: «Análisis espectral de la binaria de rayos X Aql X-1 en outburst». Universidad Nacional de Educación a Distancia (UNED), 2025
Centro
Facultad de Ciencias
Departamento
Física Interdisciplinar