| dc.contributor | MIGUEL Y ROSA MARIA CHAVEZ DAGOSTINO | |
| dc.creator | RAUL FELIPE MALDONADO SANCHEZ | |
| dc.date | 2015-08 | |
| dc.date.accessioned | 2023-07-25T16:20:55Z | |
| dc.date.available | 2023-07-25T16:20:55Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/120 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7805341 | |
| dc.description | Disks and rings are present in different astronomical objects and at different scale
sizes, from galaxies to stars and planets. Circumstellar disks orbit stars at different
evolutionary stages and they are commonly detected as an infrared (IR) excess in
their spectral energy distributions (SED). In the case of main sequence (MS) stars,
an IR excess was first discovered in Vega (Aumann et al., 1984) with the Infrared
Astronomical Satellite (IRAS). This finding, together with the discovery of the first
exoplanet around the MS star 51 Pegasi by Mayor & Queloz (1995), opened a new era
in the field of stellar astrophysics. After the discovery of the "Vega-like" phenomenon,
a few other stars (Fomalhault, ε Eridani, β Pictoris) were also found to have an IR
excess with fluxes at 25 µm and 100 µm significantly higher than those expected solely
from the photosphere. The SED of this kind of excesses in the IR is consistent with
models where dust particles in disks emit the extra energy, because they absorb the
optical and ultraviolet light from the central star and re-radiate this energy thermally
in the IR (Zuckerman, 2001). In Figure 1.1 we show the SEDs of the four stars showing
the Vega-like phenomenon (sometimes known as the fabulous four). | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| dc.relation | citation:Maldonado-Sanchez R.F. | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/Discos circunstelares/Circumstellar disks | |
| dc.subject | info:eu-repo/classification/IR Surveys/IR Surveys | |
| dc.subject | info:eu-repo/classification/Estrellas con planetas/Stars with planets | |
| dc.subject | info:eu-repo/classification/Fotometría óptica e infrarroja/Optical and infrared photometry | |
| 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 | Infrared excesses in stars with and without planets | |
| dc.type | info:eu-repo/semantics/masterThesis | |
| dc.audience | generalPublic | |
