Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-06-22
Astronomy and Astrophysics
Astrophysics
Review for the Dark Matter/Dark Energy 2004 Conference at UCLA. 7 pages, no illustrations, but many references to published fi
Scientific paper
Since the original baryonic dark matter detection from quasar microlensing was first announced in 1996, substantial strides have been made in confirming the rapid microlensing signature in the Q0957 system and in other gravitational lens systems. The most rapid event recognized had a 1% amplitude and a 12-hour duration. Interpretation of the rapid fluctuations has centered upon 3 offered explanations; microlensing of fine quasar structure by a population of planet mass astronomical bodies in the lens galaxy, orbiting bright structures in the accretion disc of the supermassive black hole of the quasar, or dark clouds swarming around the luminous quasar source. The observations, particularly the equal positive and negative fluctuations, seem to strongly favor the cosmological population of planetary mass objects in the lens galaxy. Of the several ideas advanced for the origin of such a population, the most appealing seems to be their birth at the time of recombination 300,000 years after the Big Bang.
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