Publication: Caracterización de la población estelar joven en la Nebulosa Molecular de Orión B
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2018-10-31
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Universidad Complutense de Madrid
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Abstract
Para conocer la población estelar de las regiones de formación estelar, los estudios en infrarrojo son la herramienta perfecta para caracterizar el estado evolutivo de los objetos encontrados. Sin embargo, en estas longitudes de onda se encuentra que se pierde parte de la población, ya sea por estar muy absorbida o por que dejen de mostrar propiedades infrarrojas. Por ello, es necesario buscar un método complementario para revelar la población al completo. Los rayos X duros (> 1 ke V) atraviesan las nubes de gas y el polvo sin casi interaccionar con la materia debida a la pequea sección eficaz de estos últimos. Esto sumado a que los objetos estelares jóvenes muestran una intensa emisión en rayos X permite a los estudios combinados de IR y rayos X caracterizar las regiones de formación estelar en su totalidad. Un estudio combinando observaciones en rayos X, fotometría infrarroja y optica, se llevará a cabo para estudiar la población de NGC 2023 y de la Nube Molecular de Orión B. Los objetivos de este trabajo son: l. Realizar un estudio de la población estelar de NGC 2023, obteniendo las propiedades infrarrojas y de rayos X, así como sus parámetros estelares. 2. Realizar un estudio global de la población que compone la Nebulosa Molecular de Orión B. 3. Obtener la población estelar joven menos masiva, estudiando si exiten diferencias en el mecanismo de formación estelar, tanto a nivel individual dentro de la nebulosa de Orión B como en relación con los complejos vecinos. 4. Estudiar las propiedades infrarrojas y las propiedades coronales de las miembros de la Nube Molecular de Orión B. 5. Y estudiar la influencia de los distintos frentes de ionización que actúan en la nebulosa de Orión B y su influencia en la juventud de las fuentes que circundan...
To know the stellar population of star forming regions, IR studies are the perfect tool to characterize the evolutionary stage of the objects found. However, it is found that at these wavelengths part of the population is lost, because they are very absorbed or because they cease to show infrared properties. Therefore, it is necessary to look for a complementary method to relieve the entire population. As with radio-waves, hard X-rays (> 1 keV) pass through clouds of gas and dust without interacting with matter due to the effective section of the latter. This, coupled with the fact that young stellar objects show intense X-ray emission, allows combined IR and X-ray studies to characterize stellar regions revealing the entire population of the cloud. A study of this type, combining observations in X-rays, infrared and optical photometry will be carried out to study the population of NGC 2023 and Orion B. The main aims of this work are: 1. Perform a study of the stellar population of NGC 2023. Obtaining the infrared and X-ray properties, as well as their stellar parameters. 2. Perform a global study of the population that makes up the Orion B Molecular Cloud. 3. Reveal the less massive young stellar population, studying whether differences exist in the stellar formation mechanism, both individually within the Orion B nebula and in relation to neighboring complexes. 4. Study the infrared properties and coronal properties of the members of the cloud. 5. And to study the influence of the different ionizing fronts acting on the Orion B nebula and its influx in the youth of the surrounding fountains...
To know the stellar population of star forming regions, IR studies are the perfect tool to characterize the evolutionary stage of the objects found. However, it is found that at these wavelengths part of the population is lost, because they are very absorbed or because they cease to show infrared properties. Therefore, it is necessary to look for a complementary method to relieve the entire population. As with radio-waves, hard X-rays (> 1 keV) pass through clouds of gas and dust without interacting with matter due to the effective section of the latter. This, coupled with the fact that young stellar objects show intense X-ray emission, allows combined IR and X-ray studies to characterize stellar regions revealing the entire population of the cloud. A study of this type, combining observations in X-rays, infrared and optical photometry will be carried out to study the population of NGC 2023 and Orion B. The main aims of this work are: 1. Perform a study of the stellar population of NGC 2023. Obtaining the infrared and X-ray properties, as well as their stellar parameters. 2. Perform a global study of the population that makes up the Orion B Molecular Cloud. 3. Reveal the less massive young stellar population, studying whether differences exist in the stellar formation mechanism, both individually within the Orion B nebula and in relation to neighboring complexes. 4. Study the infrared properties and coronal properties of the members of the cloud. 5. And to study the influence of the different ionizing fronts acting on the Orion B nebula and its influx in the youth of the surrounding fountains...
Description
Tesis de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, Departamento de Física de la Tierra, Astronomía y Astrofísica II (Astrofísica y Ciencias de la Atmósfera), leída el 15/06/2017