117 research outputs found
Some Consequences of the Baryonic Dark Matter Population
Microlensed double-image quasars have sent a consistent message that the
baryonic dark matter consists of a population of free-roaming planet mass
objects, as summarized previously. These were previously predicted to have
formed at the time of recombination, 300,000 years after the Big Bang, whence
they collapsed on a Kelvin Helmholz time scale. Today they are glimpsed as the
cometary knots in planetary nebulae. But they probably also nucleate the
mysterious Lyman-alpha clouds and cause a reduction in the transparency of the
universe to distant quasars and supernovae.Comment: Report to the Edinburgh International Dark Matter 2004 Symposiu
Can gravitational waves be detected in quasar microlensing?
Studies of the lensed quasar have shown evidence
for microlensing in the brightness history of the quasar images. It had been
suggested that a frequency offset between the brightness fluctuations in each
of the two images might possibly be caused by gravitational radiation generated
by a massive black hole binary at the center of the lensing galaxy. This paper
demonstrates that the fluctuations produced by such a source of gravitational
waves will be too small to account for the observed frequency offsets.Comment: 10 pages, 1 fig; submitted to Ap
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