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Alumno

Luis Manuel León Anaya

   »  Generación: Febrero2018
   »  Grado: Doctorado en Ciencias de la Comunicaci├│n
   »  Asesor: Juan Carlos Cuevas Tello
   »  Línea de Investigación: Ninguna
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NOMBRE DE TESIS
An evolutionary approach to estimate time delays of strong gravitational lenses

RESUMEN:

The occurrence of a strong gravitational lens befall when an onlooker gaze a light source situated at the back of an immense mass of matter like a galaxy or an ensemble of galaxies. The beam of light that emanates from the source is redirected and magnified by a vast matter that performs like an optical lens. As a result of the gravitational lens effect, various light signals appear in the near periphery of the galaxy that served as the lens. These multiple signals or lensed images - that are actually released from the same source - can change its luminous intensity as time goes by. This fluctuations can be seen in all lensed images, although with a time delay because the signal emitted from the source is deflected and travels through different pathways. Admitting as a fact the general theory of relativity, it is possible to measure the Hubble constant by correctly estimating the time delays between these multiple images. As a consequence, a reliable cosmographic analyses can be achieved. Despite many tools have been deployed to tackle these issue, an increase in the accuracy might be fruitful. Hence in this investigation, models from machine learning will be taken under review and to go further this tools will be guided by an evolutionary computation approach. The methods will be tested on simulated datasets taken from the Strong Lens Time Delay Challenge. Once their effectiveness is proven, we will analyze real data from the quasars DES J0408-5354, HE 04351223 and HS2209+1914. Finally, these evolutionary models will be compared with other statistical models (Dispersion Spectra, Cross Correlation, Discrete Correlation Function, among others).