Document detail
ID
oai:arXiv.org:2501.01122
Topic
Astrophysics - Earth and Planetary... Physics - Space PhysicsAuthor
Rumenskikh, M. Taichenachev, A. V. Shaikhislamov, I. F. Yudin, V. I.Category
sciences: astrophysics
Year
2025
listing date
1/8/2025
Keywords
method fieldsAbstract
The intrinsic magnetic fields of exoplanets affect the structure of their atmospheres and plasmaspheres and, therefore, the observational manifestations of transit absorptions.
This work proposes a new method for constraining the presence or absence of relatively weak magnetic fields.
The method is based on the quantum effect of atomic alignment of the lower energy level resulting in changing the absorption probabilities of individual transitions of multiplets from the equilibrium 2J+1 value.
It appears to be sensitive to fields above ~0.001 G.
We applied this method to some available transit observations of exoplanets and demonstrate that we indeed have the possibility to constrain the intrinsic magnetic field of some exoplanets right now.
However, more precise and repetitive measurements, which might be available in near future, are needed for definite conclusions.
;Comment: MNRAS Letters, 2024
Rumenskikh, M.,Taichenachev, A. V.,Shaikhislamov, I. F.,Yudin, V. I., 2025, Probing exoplanetary magnetism via atomic alignment effect
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