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Analysis of interplanetary Lyman-alpha line profile with a hydrogen absorption cell - Theory of the Doppler angular spectral scanning method

Abstract : The use of a hydrogen absorption cell as a means of diagnostic for interstellar hydrogen is described. Through resonance scattering of solar Lyα photons, the interstellar atoms penetrating into the solar system present a Lyα emission the profile of which is an image of their velocity distribution. From the study of hydrogen Lyα profiles the temperature T of the interstellar hydrogen and the three components of the relative velocity vector Vw can be determined. The case in which the velocity distribution of H atoms in the interplanetary medium is the same Maxwell-Boltzmann distribution as at infinity (the uniform gaussian case) is completely described.
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https://hal-insu.archives-ouvertes.fr/insu-03168754
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  • HAL Id : insu-03168754, version 1

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Jean-Loup Bertaux, Rosine Lallement. Analysis of interplanetary Lyman-alpha line profile with a hydrogen absorption cell - Theory of the Doppler angular spectral scanning method. Astronomy and Astrophysics - A&A, EDP Sciences, 1984, 140 (2), pp.230-242. ⟨insu-03168754⟩

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