Zobrazeno 1 - 10
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pro vyhledávání: '"Papoular, Renaud"'
Autor:
Papoular, Renaud
Any distortion of a chemical structure causes new features to appear in the absorption spectrum of the structure, especially in the visible and near UV (see Paper I). Chemical modeling, using molecular orbital theory, showed that the continuum result
Externí odkaz:
http://arxiv.org/abs/2001.02548
Autor:
Papoular, Renaud
This work purports to help understand the InterStellar Extinction Curve in and near the visible range. In this range, crystalline materials are known to be transparent, so amorphous dust is needed. Molecular modeling experiments are used to compute t
Externí odkaz:
http://arxiv.org/abs/1905.07560
Autor:
Papoular, Renaud
The basic tenets of the alternative interpretation to be presented here are that the spectral profiles of the star light polarization peaks observed in the visible and near IR are a result of the optical properties of silicate grains in the same spec
Externí odkaz:
http://arxiv.org/abs/1806.03001
Autor:
Papoular, Renaud
The motion of diamagnetic dust particles in interstellar magnetic fields is studied numerically with several different sets of parameters. Two types of behavior are observed, depending on the value of the critical number $R$, which is a function of t
Externí odkaz:
http://arxiv.org/abs/1712.10166
Autor:
Papoular, Renaud
Rotation damping and alignment are discussed as prerequisites for polarization power. An expression is derived from first principles, for the damping time of the rotation of a particle in a magnetic field, under the Faraday braking torque, provided i
Externí odkaz:
http://arxiv.org/abs/1707.05247
Autor:
Papoular, Renaud
A new mechanism is described, analyzed and visualized, for the dissipation of suprathermal rotation energy of molecules in magnetic fields, a necessary condition for their alignment. It relies upon the Lorentz force perturbing the motion of every ato
Externí odkaz:
http://arxiv.org/abs/1601.01479
Autor:
Papoular, Renaud
Together with their fingerprint modes, molecules carry coherent vibrations of all their atoms (phonons). Phonon spectra extend from $\sim$20 to more than $10^{4}\,\mu$m, depending on molecular size. These spectra are discrete but large assemblies of
Externí odkaz:
http://arxiv.org/abs/1504.03851
Autor:
Papoular, Robert J., Papoular, Renaud
Far infrared(FIR) data on the optical properties of graphite are presently lacking. An important step towards filling this gap was taken by Kuzmenko et al. (2008) who measured, on HOPG (Highly Oriented Pyrolitic Graphite) at normal incidence and from
Externí odkaz:
http://arxiv.org/abs/1407.1175
Autor:
Papoular, Renaud
Based on the results of chemical analysis and simulation of kerogens and immature coals, a large number of chemical structures carrying the 3.4-mum feature were studied by means of computer simulation codes. Further selection criteria were the integr
Externí odkaz:
http://arxiv.org/abs/1403.5938
Autor:
Papoular, Renaud
This work purports to model the far infrared gray-body emission in the spectra of high-Galactic-latitude clouds. Several carbonaceous laboratory materials are tested for their fitness as carriers of this modified-black-body emission which, according
Externí odkaz:
http://arxiv.org/abs/1403.0712