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開始行:
担当者：Masatoshi Shoji
時間 ：10:30-12:00
場所 ：理学部1号館908号室
Title:
Massive Neutrinos in Cosmology: Analytic Solutions and Fl...
Abstract:
We study the evolution of linear density fluctuations of
free-streaming massive neutrinos at redshift of z<1000, w...
explicit justification on the use of a fluid approximatio...
the collisionless Boltzmann equation in an Einstein de-Si...
universe, truncating the Boltzmann hierarchy at lmax=1 an...
compare the resulting density contrast of neutrinos, with...
exact solutions of the Boltzmann equation that we derive....
speaking, the fluid approximation is accurate if neutrino...
already non-relativistic when the neutrino density fluctu...
given wavenumber entered the horizon. We find that the fl...
approximation is accurate at sub-percent levels for massi...
with m > 0.05eV at the scale of k<1.0h/Mpc and redshift o...
result validates the use of the fluid approximation, at l...
most massive species of neutrinos suggested by the neutrino
oscillation experiments.
&br;
終了行:
担当者：Masatoshi Shoji
時間 ：10:30-12:00
場所 ：理学部1号館908号室
Title:
Massive Neutrinos in Cosmology: Analytic Solutions and Fl...
Abstract:
We study the evolution of linear density fluctuations of
free-streaming massive neutrinos at redshift of z<1000, w...
explicit justification on the use of a fluid approximatio...
the collisionless Boltzmann equation in an Einstein de-Si...
universe, truncating the Boltzmann hierarchy at lmax=1 an...
compare the resulting density contrast of neutrinos, with...
exact solutions of the Boltzmann equation that we derive....
speaking, the fluid approximation is accurate if neutrino...
already non-relativistic when the neutrino density fluctu...
given wavenumber entered the horizon. We find that the fl...
approximation is accurate at sub-percent levels for massi...
with m > 0.05eV at the scale of k<1.0h/Mpc and redshift o...
result validates the use of the fluid approximation, at l...
most massive species of neutrinos suggested by the neutrino
oscillation experiments.
&br;
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