| dc.contributor | BERTHA ALICIA PORRAS JUAREZ | |
| dc.creator | JESUS ABRAHAM REYES DE LIBRADO | |
| dc.date | 2013-05 | |
| dc.date.accessioned | 2023-07-25T16:22:19Z | |
| dc.date.available | 2023-07-25T16:22:19Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/801 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7806018 | |
| dc.description | 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). | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| dc.relation | citation:Reyes-DeLibrado J.A. | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/Formación estelar/Star formation | |
| dc.subject | info:eu-repo/classification/Accretion disks/Accretion disks | |
| dc.subject | info:eu-repo/classification/Evolución estelar/Stellar evolution | |
| dc.subject | info:eu-repo/classification/Masa estelar/Stellar mass | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.title | Stellar formation in the Carina south Pillars region | |
| dc.type | info:eu-repo/semantics/masterThesis | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dc.audience | students | |
| dc.audience | researchers | |
| dc.audience | generalPublic | |
