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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/801| Stellar formation in the Carina south Pillars region | |
| JESUS ABRAHAM REYES DE LIBRADO | |
| BERTHA ALICIA PORRAS JUAREZ | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Star formation Accretion disks Stellar evolution Stellar mass | |
| 1. A multi-wavelength photometric catalog of about 38 000 sources from 2 μm to 1.1 mm in a 1 square degree are of the Carina South Pillar Region has been constructed. This catalog is based on millimeter observations with the bolometer array AzTEC as a visitor instrument to ASTE telescope and IR public available data. It is found that 118/38000 of the total sources in the region are millimeter AzTEC sources. 2. This work is focused on the population of 118 millimeter point-like sources with and without IR counterpart, which are identified as either YSO candidates (YSOc) or as possible starless cores (Enoch et al., 2008, and references therein), respectively. After a visual inspection of 52/118 millimeter sources with S/N > 4 (or integrated flux > 300 mJy), a total of 12 YSOc and 40 starless cores are reported. 3. A primary observational classification of embedded sources, based on estimations of the IR index αIR _d log (λF λ) /d log λ (λ from 2.12 to 24 μm), gives about 33 700 objects classified as Class III, 2300 as Class II and 900 as Class 0/I. 4. With the help of NIR diagnostic diagrams, a mean extinction value AV ~15 mag from embedded main sequence stars is estimated. Furthermore, the MIR diagrams show also a more embedded young object population with larger AV values. Although a complete study based on mid-IR and millimeter interstellar extinction maps are necessary to better estimate individual AV values, the extinction estimated from NIR photometry provides an acceptable constrain to physical parameters from the fitted models (Robitaille et al., 2007) to the YSOc sample. 5. In summary, 17% of AzTEC sources (S/N > 4) lie within a pillar body, and only 3-4 associated with the pillar head. Also 15% are located within an irradiated edge structure. Almost 40% show IR sources near or associated the millimeter emission, and 25% show more than one source related to the millimeter emission. All of these sources are good candidates to be observed with larger angular resolution (e.g., LMT, ALMA). | |
| Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| 2013-05 | |
| Tesis de maestría | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Reyes-DeLibrado J.A. | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Maestría en Astrofísica |
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| Fichero | Tamaño | Formato | |
|---|---|---|---|
| ReyesLJA.pdf | 4.65 MB | Adobe PDF | Visualizar/Abrir |