  The accretion of a cloud of hydrogen at the surface of a small, heavy star
produces a high energy mostly dissipated by electromagnetic radiation.
  The combination of the absorption and the redshift of this radiation by
hydrogen explains all spectral observations: shapes of the broad lines, and
their anti-correlation with the radio-loudness, lack of lines in front of the
Lyman forest, value zb = 0.062 of the periodicity of the redshifts, correlation
of a high redshift with a thermal spectrum attributed to dust.
  As a large part of the redshift is intrinsic, the quasars are not extremely
far, the may be the missing "accretor isolated neutron stars".
  These properties are deduced from usual laws of physics without new
parameters, they do not require any non baryonic matter.
