Quasar Red-Shifts: Experimental Test via the H:21cm Line

Details Quasar Red-Shifts: Experimental Test via the H:21cm Line Quasar Red-Shifts: Experimental Test via the H:21cm Line

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17085g&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Quasars often exhibit large red-shifts, with interpretational controversies about large Doppler recessional velocities and distant locations via the Hubble galactic diagram. In some cases, the H:21cm line has a lower ascribed Doppler recessional velocity than the UV/visible lines. Part of this red-shift discrepancy may be due to a succession of photon-Raman interactions with atomic hydrogen. The ground state of atomic hydrogen consists of an antiparallel arrangement of the proton and electron spins so that the total angular momentum (F) is zero. The parallel arrangement (F=1) represents a hyperfine energy state 6x10-6 ev above the F=0 ground state. When an energetic photon interacts with a hydrogen atom in the F=0 state, the photon can lose some of its energy by exciting the hydrogen atom to the F=1 state through an “atomic Raman-type” interaction. A succession of photon-Raman interactions with atomic hydrogen may lead to ADDITIONAL red-shifts in quasars. A definitive experimental test can be performed by contrasting the red-shift of UV/visible and H:21cm lines from the quasar. Some available measurements are consistent with this proposed additional non-Doppler mechanism

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