28,524 research outputs found
Origin of Mass. Mass and Mass-Energy Equation from Classical-Mechanics Solution
We establish the classical wave equation for a particle formed of a massless
oscillatory elementary charge generally also traveling, and the resulting
electromagnetic waves, of a generally Doppler-effected angular frequency \w,
in the vacuum in three dimensions. We obtain from the solutions the total
energy of the particle wave to be \eng=\hbarc\w, 2\pi \hbarc being a
function expressed in wave-medium parameters and identifiable as the Planck
constant. In respect to the train of the waves as a whole traveling at the
finite velocity of light , \eng=mc^2 represents thereby the translational
kinetic energy of the wavetrain, m=\hbarc\w/c^2 being its inertial mass and
thereby the inertial mass of the particle. Based on the solutions we also write
down a set of semi-empirical equations for the particle's de Broglie wave
parameters. From the standpoint of overall modern experimental indications we
comment on the origin of mass implied by the solution.Comment: 13 pages, no figure. Augmented introductio
A population of extreme mid-to-near-infrared sources: obscured AGN and dusty starbursts
We present a sample of mid-infrared detected sources from the European Large
Area ISO Survey (ELAIS) regions characterised by strong mid-IR radiation with
faint near-IR and optical counterparts. These extreme mid-to-near-IR objects
(EMNOs) are defined here by a flux ratio of f_15um / f_2.2um > 25. This
population is not obvious in deeper small area ISO surveys, though it produces
more than 20% of the observed cosmic IR background radiation (CIRB) at 15um
above 1 mJy. Near-future large area deep mid-IR surveys with the Spitzer Space
Telescope, however, are bound to uncover large amounts of these objects, which
we argue to most likely be obscured AGN, based on SED shapes and X-ray data.
Very strong dusty starbursts at z>1 may also have high mid-to-near-IR flux
ratios, but using the MIR/NIR and FIR/MIR ratios these may be separated. Most
of our EMNOs appear to be ULIRGs, half are also extremely red objects (ERO). A
curious case of a low redshift, less luminous object with a very young stellar
population is also found. We predict that the simple broad band selection
method makes EMNOs a useful window into high-redshift obscured nuclear activity
and its sought after relation to star-formation, in a similar way that EROs
have been used to define samples of high-redshift early type galaxies.Comment: 8 pages, 3 figures. A&A accepted version. Results unchanged but
discussion is significantly expande
Nonclassical microwave radiation from the dynamical Casimir effect
We investigate quantum correlations in microwave radiation produced by the
dynamical Casimir effect in a superconducting waveguide terminated and
modulated by a superconducting quantum interference device. We apply
nonclassicality tests and evaluate the entanglement for the predicted field
states. For realistic circuit parameters, including thermal background noise,
the results indicate that the produced radiation can be strictly nonclassical
and can have a measurable amount of intermode entanglement. If measured
experimentally, these nonclassicalilty indicators could give further evidence
of the quantum nature of the dynamical Casimir radiation in these circuits.Comment: 5 pages, 3 figure
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