scholarly journals Blackbody Radiation and the Scaling Symmetry of Relativistic Classical Electron Theory with Classical Electromagnetic Zero-Point Radiation

2010 ◽  
Vol 40 (8) ◽  
pp. 1102-1116 ◽  
Author(s):  
Timothy H. Boyer
Keyword(s):  
Zero Point ◽  
Blackbody Radiation ◽  
Electron Theory ◽  
Classical Electron ◽  
Scaling Symmetry

scholarly journals Disguised electromagnetic connections in classical electron theory

2021 ◽  
Author(s):  
Timothy H Boyer
Keyword(s):  
Electromagnetic Radiation ◽  
Zero Point ◽  
Classical Analysis ◽  
Mechanical Motion ◽  
Low Velocity ◽  
Oscillator Potential ◽  
Electron Theory ◽  
Classical Electron ◽  
Harmonic Oscillator Potential ◽  
Relativistic Particles

Abstract In the first quarter of the 20th century, physicists were not aware of the existence of classical electromagnetic zero-point radiation nor of the importance of special relativity. Inclusion of these aspects allows classical electron theory to be extended beyond its 19th century successes. Here we review spherical electromagnetic radiation modes in a conducting-walled spherical cavity and connect these modes to classical electromagnetic zero-point radiation and to electromagnetic scale invariance. Then we turn to the scattering of radiation in classical electron theory within a simple approximation. We emphasize that, in steady-state, the interaction between matter and radiation is disguised so that the mechanical motion appears to occur without the emission of radiation, even though the particle motion is actually driven by classical electromagnetic radiation. It is pointed out that, for nonrelativistic particles, only the harmonic oscillator potential taken in the low-velocity limit allows a consistent equilibrium with classical electromagnetic zero-point radiation. For relativistic particles, only the Coulomb potential is consistent with electrodynamics. The classical analysis places restrictions on the value of e^2/(hbar c).

scholarly journals Classical electron theory and conservation laws

1999 ◽  
Vol 258 (4-6) ◽  
pp. 197-204 ◽  
Author(s):  
Michael K.-H. Kiessling
Keyword(s):  
Conservation Laws ◽  
Electron Theory ◽  
Classical Electron

Dynamical Aspects of Classical Electron Theory

1997 ◽  
pp. 187-199
Author(s):  
D. Bambusi ◽  
A. Carati ◽  
L. Galgani ◽  
D. Noja ◽  
J. Sassarini
Keyword(s):  
Electron Theory ◽  
Classical Electron

Discovery of Blackbody Stars and the Accuracy of SDSS photometry

2018 ◽  
Vol 14 (A30) ◽  
pp. 480-484
Author(s):  
Masataka Fukugita
Keyword(s):  
Trace Amount ◽  
White Dwarfs ◽  
Zero Point ◽  
Blackbody Radiation ◽  
Stellar Objects ◽  
Helium Atmosphere ◽  
Line Features ◽  
Zero Points

AbstractWe discovered stars that show spectra very close to the blackbody radiation without any line features. We found 17 such stars out of 0.8 million stellar objects in the SDSS archive. The blackbody temperature is approximately 104K. We identify these stars as DB white dwarfs with the helium atmosphere, possibly with a trace amount of hydrogen, that yields nearly perfect blackbody spectrum, which is also confirmed with our later study. These stars can be used to test the accuracy of the AB zero point across different colour bands, in particular including the NIR pass bands. The zero points of SDSS photometry are verified to < 0.01 mag.

scholarly journals Magnitude to luminance conversions and visual brightness of the night sky

2020 ◽  
Vol 493 (2) ◽  
pp. 2429-2437 ◽  
Author(s):  
Salvador Bará ◽  
Martin Aubé ◽  
John Barentine ◽  
Jaime Zamorano
Keyword(s):  
Power Distribution ◽  
Spectral Power ◽  
Incident Light ◽  
Zero Point ◽  
Blackbody Radiation ◽  
Data Set ◽  
Spectral Power Distribution ◽  
Night Sky ◽  
Scotopic Adaptation ◽  
Visual Brightness

ABSTRACT The visual brightness of the night sky is not a single-valued function of its brightness in other photometric bands, because the transformations between photometric systems depend on the spectral power distribution of the skyglow. We analyse the transformation between the night sky brightness in the Johnson–Cousins V band (mV, measured in magnitudes per square arcsecond, mpsas) and its visual luminance (L, in SI units cd m−2) for observers with photopic and scotopic adaptation, in terms of the spectral power distribution of the incident light. We calculate the zero-point luminances for a set of skyglow spectra recorded at different places in the world, including strongly light-polluted locations and sites with nearly pristine natural dark skies. The photopic skyglow luminance corresponding to mV=0.00 mpsas is found to vary in the range 1.11–1.34 × 105 cd m−2 if mV is reported in the absolute (AB) magnitude scale, and in the range 1.18–1.43 × 105 cd m−2 if a Vega scale for mV is used instead. The photopic luminance for mV=22.0 mpsas is correspondingly comprised between 176 and 213 μcd m−2 (AB), or 187 and 227 μcd m−2 (Vega). These constants tend to decrease for increasing correlated colour temperature (CCT). The photopic zero-point luminances are generally higher than the ones expected for blackbody radiation of comparable CCT. The scotopic-to-photopic luminance (S/P) ratio for our spectral data set varies from 0.8 to 2.5. Under scotopic adaptation the dependence of the zero-point luminances with the CCT, and their values relative to blackbody radiation, is reversed with respect to photopic ones.

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