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Palomino, A., (2021). Leptonic Modeling of the Multiwavelength Spectra of Astrophysical Sources [Pontificia Universidad Católica del Perú]. http://hdl.handle.net/20.500.12404/18191
Palomino, A., Leptonic Modeling of the Multiwavelength Spectra of Astrophysical Sources []. PE: Pontificia Universidad Católica del Perú; 2021. http://hdl.handle.net/20.500.12404/18191
@misc{sunedu/2657591,
title = "Leptonic Modeling of the Multiwavelength Spectra of Astrophysical Sources",
author = "Palomino Ylla, Ariadna Uxue",
publisher = "Pontificia Universidad Católica del Perú",
year = "2021"
}
Title: Leptonic Modeling of the Multiwavelength Spectra of Astrophysical Sources
Authors(s): Palomino Ylla, Ariadna Uxue
Advisor(s): Bazo Alba, José Luis
Keywords: Astrofísica de partículas; Física; Fotones
OCDE field: http://purl.org/pe-repo/ocde/ford#1.03.00
Issue Date: 10-Feb-2021
Institution: Pontificia Universidad Católica del Perú
Abstract: Este trabajo nace del interés en los procesos que tienen lugar en los núcleos activos de galaxia
(AGN). Los AGN son fuentes poderosas de radiación en un amplio espectro de frecuencias. A
fin de obtener información sobre estos procesos, la distribución espectral de energía (SED) para
múltiples frecuencias es utilizada. El presente trabajo usa tres tipos de distribuciones aplicadas
a dos blazars, un tipo de núcleos de galaxia activos. La SED de los blazars típicamente tiene una
estructura de dos montículos que puede ser explicada en términos de dos modelos: hadrónico
y leptónico. Un modelo puramente compuesto de procesos leptónicos (en este caso Compton
inverso y sincrotrón) ha probado ser adecuado para explicar la radiación emitida por los blazars.
Naima, un paquete de Python, restringe los parámetros de los modelos para hallar el mejor ajuste
para los datos observados y, de ese modo, caracterizar la fuente al proponer procesos que puedan
tener lugar en ella. Los SED de los blazars Mrk 421 y PKS 0537-441 son modelados. Los
mejores ajustes obtenidos siguen una distribución diferencial de electrones de la forma de un
exponential cutoff power law y tienen c2 reducidos de 1.92 y 2.58 respectivamente. En el caso
del modelo ajustado para el blazar PKS 0537-441, la radiación del flujo de fotones producto del
proceso sincrotrón produce la mayor contribución en el origen del flujo del proceso de Compton
inverso.
This work is motivated by the physical processes which take place in active galactic nuclei (AGN). They are powerful sources of radiation in a wide wavelength. To gain knowledge about these processes, multiwavelength spectral energy distributions (SED) are used. The current work uses three types of distributions applied to two blazars, a variety of AGN objects. The SED of blazars typically has a double-hump structure which can be explained in terms of two models: the hadronic and the leptonic model. A model built only by leptonic processes (in this case, inverse Compton and synchrotron) has proved to be fairly-good to explain the gamma-ray emission from most blazars. The Python package Naima restricts model parameters to find the best fit for the observed data and characterize the source by proposing processes that could take place there. The SEDs of the Mrk 421 and PKS 0537-441 blazars were modelled. The best fits obtained follows an electron differential distribution of the form of an exponential cutoff power law. They have a reduced c2 of 1.92 and 2.58, respectively. For the fitted model for the blazar PKS 0537-441, the radiation of the flux of photons product of the synchrotron process produces the major contribution on the inverse Compton flux.
This work is motivated by the physical processes which take place in active galactic nuclei (AGN). They are powerful sources of radiation in a wide wavelength. To gain knowledge about these processes, multiwavelength spectral energy distributions (SED) are used. The current work uses three types of distributions applied to two blazars, a variety of AGN objects. The SED of blazars typically has a double-hump structure which can be explained in terms of two models: the hadronic and the leptonic model. A model built only by leptonic processes (in this case, inverse Compton and synchrotron) has proved to be fairly-good to explain the gamma-ray emission from most blazars. The Python package Naima restricts model parameters to find the best fit for the observed data and characterize the source by proposing processes that could take place there. The SEDs of the Mrk 421 and PKS 0537-441 blazars were modelled. The best fits obtained follows an electron differential distribution of the form of an exponential cutoff power law. They have a reduced c2 of 1.92 and 2.58, respectively. For the fitted model for the blazar PKS 0537-441, the radiation of the flux of photons product of the synchrotron process produces the major contribution on the inverse Compton flux.
Link to repository: http://hdl.handle.net/20.500.12404/18191
Discipline: Ciencias con mención en Física
Grade or title grantor: Pontificia Universidad Católica del Perú. Facultad de Ciencias e Ingeniería
Grade or title: Bachiller en Ciencias con mención en Física
Register date: 11-Feb-2021; 11-Feb-2021
This item is licensed under a Creative Commons License