White light through low pressure H atoms.

Jacques Moret-Bailly (1)

1 Chercheur indépendant

Propagation of white light in very low pressure, relatively cold H atoms of space, is spatially coherent. Lyman alpha absorption pumps atoms to 2P states. Stimulated Raman losses (SRL) using fine levels quanta of excited H, redshift light at all frequencies until an alpha superradiant flare de-excites H and super-absorbs a black line of a Lyman forest. Pumping stops when an absorbed line is shifted to alpha frequency, so that beta and gamma lines are visibly absorbed. If there is energy enough at Lyman beta frequency, a similar, slow redshift restarts the process. A quasar H spectrum is generated. Hubble redshift evaluates a column density of H in 2P state.

Domaines: Optique [physics.optics]

Jacques Moret-Bailly. White light through low pressure H atoms.. 2019. ⟨hal-02184296⟩