A submillimeter polarization analysis of Frosty Leo
| Autor: | Laurence Sabin, Qizhou Zhang, Roberto Vázquez, Wolfgang Steffen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Molecular line 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Polarimetry FOS: Physical sciences Astronomy and Astrophysics Torus Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Polarization (waves) Astrophysics - Astrophysics of Galaxies 01 natural sciences Submillimeter Array Magnetic field Protoplanetary nebula Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Bipolar outflow 0103 physical sciences 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 484:2966-2973 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stz155 |
| Popis: | We present a polarimetric investigation of the protoplanetary nebula Frosty Leo performed with the Submillimeter Array. We were able to detect, in the low continuum level (peak at 14.4 mJy beam$^{-1}$), a marginal polarization at $\sim2.6\sigma$. The molecular line investigation based on the CO $J=3\rightarrow2$ emission shows a peak emission of 68.1 Jy beam$^{-1}$ km s$^{-1}$ and the polarization detection in this CO line is also marginal, with a peak at $\sim3.8\sigma$. In both cases, it was therefore not possible to use the electric vector maps (B-field) to accurately trace the magnetic field (B-field) within the PPN. The spatio-kinematic modelling realised with the different velocity channel maps indicates three main structures: a distorted torus accompanied by a bipolar outflow or jet aligned with its axis and a flattened spherical "cap". The comparison of the CO polarization segments with our model suggests that the polarized emission probably arises in the first two components. Comment: 8 pages, Accepted for publication in Monthly Notices of the Royal Astronomical Society |
| Databáze: | OpenAIRE |
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