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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2574| The Near-Infrared Polarimeter of Cananea, POLICAN: Optimization, Observations, and Results | |
| Enrique Omar Serrano Bernal | |
| Abraham Luna Laurence Sabin | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Polarization Instrumentation Near-Infrared Scattering Pre-Planetary Nebulae | |
| We studied the pre-planetary nebula Frosty Leo at NIR wavelengths using polarimetry and we detected the following features: • The north and south shells (NS and SS) are seen in polarized emission. These shells are located at the tips of the bipolar nebula. Their centrosymmetric vector pattern indicate that the light is being scattered. They are clearly seen in J and H bands and cover large areas, in the K’ band they are visible but less extended although this is probably due to our detection limit. We propose that these shells might be the remains of a fast ejection of material during a superwind event. The estimated duration is of 600 yr. • The extended envelope (EE) which is seen in polarized light and total intensity. This halo seen in J and H bands, has a diameter of 35” (in H band) and is the remaining material of the previous AGB phase. The PAs of the vectors associated to the EE indicate an alignment in J and H bands and are almost parallel to the equatorial plane of the nebula. This behavior could be associated to multiple scattering since the light that reaches the EE is most likely coming from the bipolar lobes. Then, the material in the EE is probably scattering the light again into our line of sight resulting in the observed polarization. • We performed a test to determine if the polarization in the equatorial region is due to aligned grains. We found a decreasing polarization between J and H bands, but, it is not consistent to match the P(λ) power-law for the ISM. Further polarization research at larger wavelengths are needed to solve this issue. | |
| Instituto Nacional de Astrofísica, Óptica y Electrónica | |
| 2021-12 | |
| Tesis de doctorado | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Serrano Bernal, E. O., (2021), The Near-Infrared Polarimeter of Cananea, POLICAN: Optimization, Observations, and Results, Tesis de Doctorado, Instituto Nacional de Astrofísica, Óptica y Electrónica. | |
| OTRAS ESPECIALIDADES ASTRONÓMICAS | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Doctorado en Astrofísica |
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| Fichero | Tamaño | Formato | |
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| SERRANOBEO_DA.pdf | 19.43 MB | Adobe PDF | Visualizar/Abrir |