RECORD
A Qualitative Interpretation of the Second Solar Spectrum of Ce ll
Astrophysics · Submitted 31 Oct 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Therefore, we interpret that fact as} due to the presence of a turbulent magnetic field in the limit of saturated Hanle effect for the lower-levels.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
This is a theoretical investigation on the formation of the linearly polarized line spectrum of ionized cerium in the sun. We calculate the scattering line polarization pattern emergent from a plane-parallel layer of Ce {\sc ii} atoms illuminated from below by the photospheric radiation field, taking into account the differential pumping induced in the various magnetic sublevels by the anisotropic radiation field. We find that the line polarization pattern calculated with this simple model is in good qualitative agreement with reported observations. Interestingly, the agreement improves when some amount of atomic level depolarization is considered. We find that the best fit to the observations corresponds to the situation where the ground and metastable levels are depolarized to about one fifth of the corresponding value obtained in the absence of any depolarizing mechanism. One possibility to have this situation is that the depolarizing rate value of elastic collisions is exactly $D=10^6{\rm s}^{-1}$, which is rather unlikely. Therefore, we interpret that fact as} due to the presence of a turbulent magnetic field in the limit of saturated Hanle effect for the lower-levels. For this turbulent magnetic field we obtain a lower limit of 0.8 gauss and an upper limit of 200-300 gauss.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | This is a theoretical investigation on the formation of the linearly polarized line spectrum of ionized cerium in the sun. | contribution 0.90 | 0.70 | 0.03 | asserted 0.96 |
| s1 | We calculate the scattering line polarization pattern emergent from a plane-parallel layer of Ce {\sc ii} atoms illuminated from below by the photospheric radiation field, taking into account the differential pumping induced in the various magnetic sublevels by the anisotropic radiation field. | method 0.97 | 0.95 | 0.04 | asserted 0.98 |
| s2 | We find that the line polarization pattern calculated with this simple model is in good qualitative agreement with reported observations. | result 1.00 | 0.95 | 0.35 | asserted 0.99 |
| s3 | Interestingly, the agreement improves when some amount of atomic level depolarization is considered. | result 1.00 | 0.94 | 0.08 | asserted 1.00 |
| s4 | We find that the best fit to the observations corresponds to the situation where the ground and metastable levels are depolarized to about one fifth of the corresponding value obtained in the absence of any depolarizing mechanism. | result 1.00 | 0.95 | 0.30 | asserted 1.00 |
| s5 | One possibility to have this situation is that the depolarizing rate value of elastic collisions is exactly $D=10^6{\rm s}^{-1}$, which is rather unlikely. | interpretation 0.45 | 0.70 | 0.04 | hedged possibility 0.93 |
| s6 | Therefore, we interpret that fact as} due to the presence of a turbulent magnetic field in the limit of saturated Hanle effect for the lower-levels. | interpretation 1.00 | 0.81 | 0.52 | hedged possibility 0.46 |
| s7 | For this turbulent magnetic field we obtain a lower limit of 0.8 gauss and an upper limit of 200-300 gauss. | result 0.99 | 0.94 | 0.31 | asserted 0.99 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
This is a theoretical investigation on the formation of the linearly polarized line spectrum of ionized cerium in the sun. We calculate the scattering line polarization pattern emergent from a plane-parallel layer of Ce {\sc ii} atoms illuminated from below by the photospheric radiation field, taking into account the differential pumping induced in the various magnetic sublevels by the anisotropic radiation field. We find that the line polarization pattern calculated with this simple model is in good qualitative agreement with reported observations. Interestingly, the agreement improves when some amount of atomic level depolarization is considered. We find that the best fit to the observations corresponds to the situation where the ground and metastable levels are depolarized to about one fifth of the corresponding value obtained in the absence of any depolarizing mechanism. One possibility to have this situation is that the depolarizing rate value of elastic collisions is exactly $D=10^6{\rm s}^{-1}$, which is rather unlikely. Therefore, we interpret that fact as} due to the presence of a turbulent magnetic field in the limit of saturated Hanle effect for the lower-levels. For this turbulent magnetic field we obtain a lower limit of 0.8 gauss and an upper limit of 200-300 gauss.
Human review
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.