Zobrazeno 1 - 10
of 158
pro vyhledávání: '"R. Papoular"'
Autor:
R. Papoular
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 472:55-66
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
Autor:
R. Papoular
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 440:2396-2405
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
Autor:
R. Papoular
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 434:862-869
This study explores the molecular origins of plateaus and continuum underlying IR and FIR bands emitted by compact nebulae, especially proto-planetary nebulae. Computational organic chemistry codes are used to deliver the vibrational integrated band
Autor:
R. Papoular
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 419:2396-2406
A model was developed for the excitation of the unidentified infrared bands (UIBs) by H atom impacts in the interstellar medium. It builds upon the fact that, in the presence of far-ultraviolet (far-UV) radiation and hydrocarbon grains, the hydrogen
Autor:
R. Papoular
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 388:457-464
Silicon carbide, a refractory material, condenses near the photospheres of C-rich AGB stars, giving rise to a conspicuous emission feature at 11.3 µm. Inthe presence of a stellar wind, the SiC grains are carried outwards to colderregions, where less
Autor:
R. Papoular
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b25708a5f09a28bc022ff84aee3d7979
Autor:
R. Papoular
Publikováno v:
Monthly Notices of the Royal Astronomical Society. :stx100
Autor:
R. Papoular
Publikováno v:
Astronomy & Astrophysics. 378:597-607
A number of authors have, in the past decade, pointed to the similarity of the 3.4-m band of kerogen with that of the Galactic Centre (GC). Kerogen is a family of solid terrestrial sedimentary materials essentially made of C, H and O interlocked in a
Autor:
R. Papoular
Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 57:947-958
The emission of the unidentified infrared bands (UIBs) has been attributed to excitation of polycyclic aromatic hydrocarbons (PAHs) by absorption of single energetic photons. Williams and Leone (1995) showed experimentally that a molecule (naphtalene
Publikováno v:
Scopus-Elsevier
Faraday Discussions
Faraday Discussions, Royal Society of Chemistry, 1998, 109, pp.335-347. ⟨10.1039/A800068I⟩
Faraday Discussions, 1998, 109, pp.335-347. ⟨10.1039/A800068I⟩
Faraday Discussions
Faraday Discussions, Royal Society of Chemistry, 1998, 109, pp.335-347. ⟨10.1039/A800068I⟩
Faraday Discussions, 1998, 109, pp.335-347. ⟨10.1039/A800068I⟩
International audience; To our knowledge, no individual polycyclic aromatic hydrocarbon (PAH) molecule has yet been shown to carry all the ubiquitous and closely correlated unidentified IR (UIR) bands. More generally, no IR space observatory (ISO) in