Analysis of interplanetary Lyman-alpha line profile with a hydrogen absorption cell - Theory of the Doppler angular spectral scanning method - Archive ouverte HAL Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 1984

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

(1) , (1)
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Jean-Loup Bertaux
  • Function : Author
  • PersonId : 914210
Rosine Lallement
  • Function : Author
  • PersonId : 915617

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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Dates and versions

insu-03168754 , version 1 (14-03-2021)

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  • HAL Id : insu-03168754 , version 1

Cite

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, 1984, 140 (2), pp.230-242. ⟨insu-03168754⟩
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