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A MM and Near-ir study of YSOS : from outbursting protostars to satellites : [recurso en línea] / Pedro Henrique Soares da Silva de Pinho Nogueira ; supervisor Alice Zurlo Alberton ; co-supervisor Lucas Cieza González.

Autor: Soares da Silva de Pinho Nogueira, Pedro Henrique., Zurlo Alberton, Alice, supervisor., Cieza González, Lucas, supervisor., Universidad Diego Portales (Chile). Facultad de Ingeniería y Ciencias. Instituto de Estudios Astrofísicos.

ESTRELLAS -- FORMACION.

PROTOESTRELLAS.

TESIS DOCTORADO EN ASTROFISICA 2024.

TESIS POSTGRADO

TESIS DOCTORADO EN ASTROFISICA

1. Introduction -- 1.1. Protoplanetary disks - theory and observations -- 1.1. YSOs classification and evolutionary stages -- 1.1.2. Eruptive stars - a “special” case -- 1.1.3. Protoplanetary disks - properties, structure, and principal physical mechanisms -- 1.2. Substellar objects: formation and detection via HCI -- 1.2.1 The main scenarios for substellar objects formation -- 1.2.2. (Sub)stellar multiplicity formation -- 1.2.3. High-Contrast Imaging: instrumentation, observing strategies and data-processing -- 1.2.4. High-Contrast Imaging: observing/characterizing substellar companions -- 1.3. Outline of this tesis -- 2. Resolving the Binary Components of the Outbursting Protostar HBC 494 with ALMA -- 2.1. Introduction -- 2.2. Observations and data reduction -- 2.2.1. Continuum imaging -- 2.2.2. Line imaging -- 2.3. Results -- 2.3.1. Continuum análisis -- 2.3.2. Line análisis -- 2.4. Discussion -- 2.4.1. Multiplicity and triggering mechanisms -- 2.4.2. Disk sizes and masses -- 2.4.3. Binary formation and alignment -- 2.5. Conclusions -- 2.6. Appendix -- 2.6.1. Effects of continuum over-subtraction -- 2.6.2. 12CO, 13CO and C18O channel maps with contours and the effect of cloud contamination -- 2.6.3. Extra channel maps -- 3. Astrometric and photometric characterization of η Tel B combining two decades of observations -- 3.1. Introduction -- 3.2. Observations and data reduction -- 3.2.1. Observations -- 3.2.2. Data reduction -- 3.3. Methodology and results -- 3.3.1. Astrometry and photometry -- 3.3.2. Orbital fitting análisis -- 3.4. Discussion -- 3.4.1. Orbital fitting constraints -- 3.4.2. Possible formation scenarios -- 3.4.3. The close surroundings of η Tel B -- 3.5. Conclusions -- 3.6. Appendix -- 3.6.1. Cornerplot of the orbital fitting -- 4. Final remarks and conclusions -- 4.1. Specific questions/concepts addressed -- 4.1.1. What is the correlation between stellar multiplicity and accretion processes, and why are binary eruptive systems so infrequently observed? -- 4.1.2. How robust astrometric analysis of a system contribute to its characterization -- 4.1.3. How can one deduct the formation scenario for multiple systems? -- 4.1.4. Is it possible to search for satellites orbiting substellar companions via HCI? -- Bibliography.

Recursos electrónicos

Datos Publicación:

Santiago, Chile, 2024.

1 Recurso en línea (xiii, 176 p., 55,2 MB) : il.

Disponible sólo en formato electrónico.

Tesis (Doctor en Astrofísica) -- Universidad Diego Portales, 2024.

Nota de Bibliografía:

Bibliografía: p. 115-176.

bibliotecasudp@mail.udp.cl

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