3,472 research outputs found
Delayed Detonation at a Single Point in Exploding White Dwarfs
Delayed detonation in an exploding white dwarf, which propagates from an
off-center transition point, rather than from a spherical transition shell, is
described and simulated. The differences between the results of 2D simulations
and the 1D case are presented and discussed. The two dimensional effects become
significant in transition density below 3.e7 g/cm^3, where the energetics, the
production of Fe group elements and the symmetry of the explosion are all
affected. In the 2D case the explosion is less energetic and less Ni is
produced in the detonation phase of the explosion. For low transition density
the reduction in Ni mass can reach 20-30 percent. The asymmetry in abundances
between regions close to the transition point and regions far from that point
is large, and could be a source to polarization patterns in the emitted light.
We conclude that the spatial and temporal distribution of transition locations,
is an important parameter which must be included in delayed detonation models
for Type Ia supernovae. \Comment: 11 pages, 1 figur
Michelson-Morley experiment within the quantum mechanics framework
It is revisited the Michelson-Morley experiment within the quantum mechanics
framework. One can define the wave function of photon in the whole space at a
given moment of time. The phase difference between the source and receiver is a
distance between the source and receiver at the time of reception hence it does
not depend on the velocity of the frame. Then one can explain the null result
of the Michelson-Morley experiment within the quantum mechanics framework
- …