Výsledky vyhledávání - "R. Ruiterkamp"

C84: A Prototype of Larger Fullerenes. Laboratory Spectroscopy and Astronomical Relevance

Autor: Pascale Ehrenfreund, R. Ruiterkamp, Bernard Foing, T. M. Halasinski, Farid Salama

Publikováno v: Fullerenes, Nanotubes and Carbon Nanostructures. 19:398-409

We present for the first time the UV/Vis spectrum of the neutral and ionized fullerene C84 isolated in a neon matrix at low temperature. After ionization with high energy (10.2 eV) UV photons, we are able to identify a new spectroscopic absorption ba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2f73bb25ef46dbd6e6cce05b8f35bae
https://doi.org/10.1080/15363831003721807

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Organic astrochemistry: observations of interstellar ketene

Autor: S. D. Rodgers, H. C. Huang, Harold M. Butner, Pascale Ehrenfreund, S. B. Charnley, R. Ruiterkamp, Yi-Jehng Kuan

Publikováno v: Astrophysics and Space Science. 310:181-188

We have observed emission from both ortho and para spin states of ketene (CH2CO) towards several deeply-embedded protostars. The low CH2CO fractional abundances (∼10−10) and the rotation temperatures (∼20 K) are consistent with emission from th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d65909247391280f245047d36b867577
https://doi.org/10.1007/s10509-007-9493-9

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The ORGANICS experiment on BIOPAN V: UV and space exposure of aromatic compounds

Autor: Farid Salama, Zita Martins, Pascale Ehrenfreund, Z. Peeters, Bernard Foing, R. Ruiterkamp

Publikováno v: Planetary and Space Science. 55:383-400

We studied the stability of aromatic compounds in low Earth orbit environment and describe the scientific results and successful flight of the ORGANICS experiment on-board the BIOPAN V space exposure facility. This experiment investigated the photo s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec47ca21d178e55a4c922f31158a37d9
https://doi.org/10.1016/j.pss.2006.07.001

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PAH charge state distribution and DIB carriers: Implications from the line of sight toward HD 147889

Autor: Marco Spaans, L. Kaper, R. Ruiterkamp, Bernard Foing, N. L. J. Cox, Pascale Ehrenfreund, Farid Salama

Publikováno v: Astronomy and Astrophysics
Astronomy & astrophysics, 432(2), 515-529.e9. EDP Sciences
Astronomy and Astrophysics, 432, 515-529. EDP Sciences

We have computed physical parameters such as density, degree of ionization and temperature, constrained by a large observational data set on atomic and molecular species, for the line of sight toward the single cloud HD147889. Diffuse interstellar ba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59fb276c543a40a086cef4b69b468835
https://doi.org/10.1051/0004-6361:20040331

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Observational tests for grain chemistry: posterior isotopic labelling

Autor: Steven B. Charnley, R. Ruiterkamp, Pascale Ehrenfreund, A. J. Markwick, S. D. Rodgers, Harold M. Butner, Adwin Boogert, Tom J. Millar

Publikováno v: Monthly Notices of the Royal Astronomical Society, 347, 157-162. Oxford University Press

We propose a series of detailed observations that should allow current ideas concerning the important catalytic pathways to interstellar molecules on interstellar dust grains to be tested. The atoms and molecules that accrete on cold grains and take

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::067a561194b7259c6906356e85a084a5
https://doi.org/10.1111/j.1365-2966.2004.07188.x

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The Astrobiology of Nucleobases

Autor: R. Ruiterkamp, Pascale Ehrenfreund, Oliver Botta, Z. Peeters, Steven B. Charnley

Publikováno v: The Astrophysical Journal. 593:L129-L132

Nucleobases are nitrogen heterocycles (N-heterocycles) that are essential components of the genetic material in all living organisms. Extraterrestrial nucleobases have been found in several carbonaceous chondrites, but only in traces. No astronomical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::393f046be9ae736fa9f09a1342ae67a2
https://doi.org/10.1086/378346

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Electronic Absorption Spectra of Neutral Perylene (C20H12), Terrylene (C30H16), and Quaterrylene (C40H20) and Their Positive and Negative Ions: Ne Matrix-Isolation Spectroscopy and Time-Dependent Density Functional Theory Calculations

Autor: Farid Salama, Martin Head-Gordon, Jennifer L. Weisman, R. Ruiterkamp, Thomas M. Halasinski, Timothy J. Lee

Publikováno v: The Journal of Physical Chemistry A. 107:3660-3669

We present a full experimental and theoretical study of an interesting series of polycyclic aromatic hydrocarbons, the oligorylenes. The absorption spectra of perylene, terrylene and quaterrylene in neutral, cationic and anionic charge states are obt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8f9a159e32bf42ee60df0fcf0d558280
https://doi.org/10.1021/jp027394w

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Spectroscopy of large PAHs

Autor: Bernard Foing, Pascale Ehrenfreund, Farid Salama, W. Schmidt, Louis J. Allamandola, Thomas M. Halasinski, R. Ruiterkamp

Publikováno v: Astronomy and Astrophysics
Astronomy and Astrophysics, 390, 1153-1170. EDP Sciences
Scopus-Elsevier

Polycyclic Aromatic Hydrocarbons (PAHs) are thought to be the carriers of the ubiquitous infrared emission bands (UIBs). Data from the Infrared Space Observatory (ISO) have provided new insights into the size distribution and the structure of interst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::305ddf9d67b87a83ff639ca44acfc522
https://doi.org/10.1051/0004-6361:20020478

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Energetic and thermal processing of interstellar ices

Autor: Steven B. Charnley, R. Ruiterkamp, Louis Le Sergeant d'Hendecourt, Pascale Ehrenfreund

Publikováno v: Journal of Geophysical Research: Planets. 106:33291-33301

Our current knowledge on the chemical composition of interstellar ices is summarized with respect to the possible contribution of energetic photons and particles to their observed state. We describe the inventory of astronomical ices as determined by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7b481b7b0d2c2af6568ebaff811f89d5
https://doi.org/10.1029/2000je001349

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UV photodestruction of CH bonds and the evolution of the 3.4 μm feature carrier

Autor: J.M. Greenberg, G. M. Muñoz Caro, R. Ruiterkamp, W. A. Schutte, Vito Mennella

Publikováno v: Astronomy & Astrophysics. 367:347-354

Experiments simulating the processing of various hydrocarbon species under diffuse and dense cloud conditions by UV irradiation were performed. The results indicate that such molecules will be efficiently dehydrogenated in interstellar space. It is a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::564975df953044b632355f5dbbb0b230
https://doi.org/10.1051/0004-6361:20000341

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