Magíster en Ciencias, Mención Astronomía / Direct Imaging of circumstellar material and forming exoplanets around young stellar
objects (YSO's) is a challenging task. Several techniques have been developed for
this purpose, among them we focused on the spectral deconvolution technique(SD).
Our goal is to create an algorithm that improves the current state of the art of the SD
technique, using principal component analysis (PCA) to create an orthogonal basis
set in annular regions centred on the star. A selection criterion for the wavelength
channels used to estimate the basis set, ensures that the model PSF is minimally
contaminated by a possible faint companion. We test our algorithm using SINFONI
data of HD 142527, HD 100546 and T Cha, obtaining a high-resolution image of the
surrounding disks in the H+K band. l-SDI gets roughly twice the amount of throughput
of its non-localized version. Using l-SDI we give new upper limit detection curves
on the selected sources, we confirm the structure of HD 142527 in the literature and
report a new spiral-arm structure in the outer disk.
| Identifer | oai:union.ndltd.org:UCHILE/oai:repositorio.uchile.cl:2250/115064 |
| Date | January 2013 |
| Creators | Salinas Poblete, Vachail Nicolás |
| Contributors | Casassus Montero, Simón, Jordán Colzani, Andrés, Facultad de Ciencias Físicas y Matemáticas, Departamento de Astronomía, Dougados, Catherine, Hamuy Wackenhut, Mario, Rojo Rubke, Patricio |
| Publisher | Universidad de Chile |
| Source Sets | Universidad de Chile |
| Language | English |
| Detected Language | English |
| Type | Tesis |
| Rights | Attribution-NonCommercial-NoDerivs 3.0 Chile, http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
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