On the generation of subphotospheric acoustic sources

ilustraciones, fotograficas, graficas, tablas

Autores:: Martínez Cifuentes, Angel Daniel

Tipo de recurso:

Fecha de publicación:: 2021

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: eng

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network_acronym_str	UNACIONAL2
network_name_str	Universidad Nacional de Colombia
repository_id_str
dc.title.eng.fl_str_mv	On the generation of subphotospheric acoustic sources
dc.title.translated.spa.fl_str_mv	Sobre la generación de fuentes acústicas subfotosféricas
title	On the generation of subphotospheric acoustic sources
spellingShingle	On the generation of subphotospheric acoustic sources 520 - Astronomía y ciencias afines::523 - Cuerpos y fenómenos celestes específicos SUPEFICIE SOLAR SOL - OBSERVACIONES TERREMOTOS Sun - Surface Earthquakes Solar physics Solar flares Helioseismology Solar interior Magnetohydrodynamics Física solar Fulguraciones solares Heliosismología Interior Solar Magnetohidrodinámica
title_short	On the generation of subphotospheric acoustic sources
title_full	On the generation of subphotospheric acoustic sources
title_fullStr	On the generation of subphotospheric acoustic sources
title_full_unstemmed	On the generation of subphotospheric acoustic sources
title_sort	On the generation of subphotospheric acoustic sources
dc.creator.fl_str_mv	Martínez Cifuentes, Angel Daniel
dc.contributor.advisor.none.fl_str_mv	Calvo Mozo, Benjamín Martínez Oliveros, Juan Carlos
dc.contributor.author.none.fl_str_mv	Martínez Cifuentes, Angel Daniel
dc.contributor.researchgroup.spa.fl_str_mv	Astronomía, Astrofísica y Cosmologia
dc.subject.ddc.spa.fl_str_mv	520 - Astronomía y ciencias afines::523 - Cuerpos y fenómenos celestes específicos
topic	520 - Astronomía y ciencias afines::523 - Cuerpos y fenómenos celestes específicos SUPEFICIE SOLAR SOL - OBSERVACIONES TERREMOTOS Sun - Surface Earthquakes Solar physics Solar flares Helioseismology Solar interior Magnetohydrodynamics Física solar Fulguraciones solares Heliosismología Interior Solar Magnetohidrodinámica
dc.subject.lemb.spa.fl_str_mv	SUPEFICIE SOLAR SOL - OBSERVACIONES TERREMOTOS
dc.subject.lemb.eng.fl_str_mv	Sun - Surface Earthquakes
dc.subject.proposal.eng.fl_str_mv	Solar physics Solar flares Helioseismology Solar interior Magnetohydrodynamics
dc.subject.proposal.spa.fl_str_mv	Física solar Fulguraciones solares Heliosismología Interior Solar Magnetohidrodinámica
description	ilustraciones, fotograficas, graficas, tablas
publishDate	2021
dc.date.issued.none.fl_str_mv	2021
dc.date.accessioned.none.fl_str_mv	2022-07-19T00:06:33Z
dc.date.available.none.fl_str_mv	2022-07-19T00:06:33Z
dc.type.spa.fl_str_mv	Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv	info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv	info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv	Text
dc.type.redcol.spa.fl_str_mv	http://purl.org/redcol/resource_type/TM
status_str	acceptedVersion
dc.identifier.uri.none.fl_str_mv	https://repositorio.unal.edu.co/handle/unal/81704
dc.identifier.instname.spa.fl_str_mv	Universidad Nacional de Colombia
dc.identifier.reponame.spa.fl_str_mv	Repositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourl.spa.fl_str_mv	https://repositorio.unal.edu.co/
url	https://repositorio.unal.edu.co/handle/unal/81704 https://repositorio.unal.edu.co/
identifier_str_mv	Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia
dc.language.iso.spa.fl_str_mv	eng
language	eng
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dc.format.extent.spa.fl_str_mv	vii, 71 páginas
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dc.publisher.spa.fl_str_mv	Universidad Nacional de Colombia
dc.publisher.program.spa.fl_str_mv	Bogotá - Ciencias - Maestría en Ciencias - Astronomía
dc.publisher.department.spa.fl_str_mv	Observatorio Astronómico Nacional
dc.publisher.faculty.spa.fl_str_mv	Facultad de Ciencias
dc.publisher.place.spa.fl_str_mv	Bogotá, Colombia
dc.publisher.branch.spa.fl_str_mv	Universidad Nacional de Colombia - Sede Bogotá
institution	Universidad Nacional de Colombia
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spelling	Atribución-NoComercial-SinDerivadas 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Calvo Mozo, Benjamínbddc9d59240df52d624f2ac364ea0804Martínez Oliveros, Juan Carlos623b930672105a0027845c2e6d5c0e09Martínez Cifuentes, Angel Danielb4397da28769a00456314b919c3055b4Astronomía, Astrofísica y Cosmologia2022-07-19T00:06:33Z2022-07-19T00:06:33Z2021https://repositorio.unal.edu.co/handle/unal/81704Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/ilustraciones, fotograficas, graficas, tablasThis work explored the possibility of the generation of seismic signals on the Sun from a confinement of energy located in the solar interior. This idea was developed through two sections. In the first section, corresponding to the observational part, the computational heliseismic holographic technique was applied to a series of photospheric velocity maps. The results obtained were contrasted with physical observables in the surface of the Sun. The analyzed data corresponded to images of the intensity of the continuum and of the line of sight magnetic and of velocity fields. The images were obtained with the HMI instrument on board the SDO spacecraft, which provides measurements of the entire solar disk at the 6173.3 Å Fe-I absorption line with a spatial resolution of 0.503" and a cadence of 45 s. With this method, we found acoustic signals at high frequencies extending beyond 10 mHz. These results allow to have a better discrimination of the spatial morphology of acoustic transients. On the other hand, taking into account the focus-defocus technique in computational holography, it was possible to analyze these ultra-impulsive signals at different depths in the solar interior. We discovered that these signals are not strictly confined to the solar surface but have a significant degree of vertical extension in the active region. In the second part, a magnetohydrodynamic simulation in 2 and 3 dimensions was developed. In this numerical scheme the magnetic structure immersed in a solar model of the interior was disturbed. We found that disturbances located at different depths are capable of generating seismic signals that can be detected on the surface, reinforcing the hypothesis raised in the observational section. These results open new prospects in helioseismology, which involves the generation of acoustic signals in solar flare events. This would allow a better understanding of the processes that take place in the solar interior as well as their relationship with the generation of acoustic signals, a mystery that still remains in solar astrophysics.Este trabajo exploró la posibilidad de generación de señales sísmicas en el Sol a partir de un confinamiento de energía localizado en el interior solar. Esta idea se desarrolló a través de dos secciones. En la primera sección, correspondiente a la parte observacional, se aplicó la técnica de heliosismología holográfica computacional a series de mapas de velocidad fotosféricos. Los resultados se contrastaron con observables físicos de la superficie del Sol. Los datos analizados correspondieron a imágenes de la intensidad del continuo y del campo magnético y de velocidades en la línea de la visual. Las imágenes fueron obtenidas con el instrumento HMI a bordo del observatorio SDO, cuyos datos de ciencia brindan mediciones del disco solar completo en la línea de absorción Fe-I a 6173.3 Å con una resolución espacial de 0.504" por píxel y una cadencia temporal de 45 s. Con este método, encontramos señales acústicas a altas frecuencias que se extienden más allá de 10 mHz. Dichos resultados permiten tener una mejor discriminación de la morfología espacial de transientes acústicos. Ahora bien, teniendo en cuenta la técnica de enfoque-desenfoque en holografía computacional, fue posible analizar dichas señales ultra-impulsivas a diferentes profundidades en el interior solar. Descubrimos que las señales que se observan no están confinadas estrictamente a la superficie solar sino que tienen un grado de extensión vertical en la región activa. En la segunda parte se desarrolló una simulación magnetohidrodinámica en 2 y 3 dimensiones. En dicho esquema numérico se perturbó la estructura magnética inmersa en un modelo solar del interior. Encontramos que perturbaciones localizadas a diferentes profundidades son capaces de generar señales sísmicas que pueden ser detectadas en la superficie, reforzando la hipótesis planteada en la sección observacional. Dichos resultados abren la posibilidad a una rama de estudio más profunda dentro de la heliosismología, la cual involucra la generación de señales acústicas en eventos de fulguraciones solares. Esto permitiría entender mejor los procesos que se llevan a cabo en el interior solar así como su relación con la generación de señales acústicas, un misterio que permanece todavía en la astrofísica solar. (Texto tomado de la fuente)MaestríaMagíster en Ciencias - AstronomíaAstrofísica Solarvii, 71 páginasapplication/pdfengUniversidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - AstronomíaObservatorio Astronómico NacionalFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá520 - Astronomía y ciencias afines::523 - Cuerpos y fenómenos celestes específicosSUPEFICIE SOLARSOL - OBSERVACIONESTERREMOTOSSun - SurfaceEarthquakesSolar physicsSolar flaresHelioseismologySolar interiorMagnetohydrodynamicsFísica solarFulguraciones solaresHeliosismologíaInterior SolarMagnetohidrodinámicaOn the generation of subphotospheric acoustic sourcesSobre la generación de fuentes acústicas subfotosféricasTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TMConny Aerts, Jørgen Christensen-Dalsgaard, and Donald W. Kurtz. Asteroseismology. 2010.J. D. Alvarado-Gómez, J. C. 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Solar Phys., 284(2):315–327, June 2013. doi: 10.1007/s11207-012-0169-4.EstudiantesInvestigadoresMaestrosORIGINAL1030651674.2021.pdf1030651674.2021.pdfTesis de Maestría en Ciencias - Astronomíaapplication/pdf17948404https://repositorio.unal.edu.co/bitstream/unal/81704/3/1030651674.2021.pdf8f587322ff5424409b1d84d41999351eMD53LICENSElicense.txtlicense.txttext/plain; charset=utf-84074https://repositorio.unal.edu.co/bitstream/unal/81704/4/license.txt8153f7789df02f0a4c9e079953658ab2MD54THUMBNAIL1030651674.2021.pdf.jpg1030651674.2021.pdf.jpgGenerated Thumbnailimage/jpeg5814https://repositorio.unal.edu.co/bitstream/unal/81704/5/1030651674.2021.pdf.jpg5399dd4163b9d48912f5f9d1adb564e3MD55unal/81704oai:repositorio.unal.edu.co:unal/817042024-08-07 23:10:21.463Repositorio Institucional Universidad Nacional de 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EVESURBIFBPUiBMQSBTRUNSRVRBUsONQSBHRU5FUkFMLiAqTEEgVEVTSVMgQSBQVUJMSUNBUiBERUJFIFNFUiBMQSBWRVJTScOTTiBGSU5BTCBBUFJPQkFEQS4gCgpBbCBoYWNlciBjbGljIGVuIGVsIHNpZ3VpZW50ZSBib3TDs24sIHVzdGVkIGluZGljYSBxdWUgZXN0w6EgZGUgYWN1ZXJkbyBjb24gZXN0b3MgdMOpcm1pbm9zLiBTaSB0aWVuZSBhbGd1bmEgZHVkYSBzb2JyZSBsYSBsaWNlbmNpYSwgcG9yIGZhdm9yLCBjb250YWN0ZSBjb24gZWwgYWRtaW5pc3RyYWRvciBkZWwgc2lzdGVtYS4KClVOSVZFUlNJREFEIE5BQ0lPTkFMIERFIENPTE9NQklBIC0gw5psdGltYSBtb2RpZmljYWNpw7NuIDE5LzEwLzIwMjEK

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