Results 111 to 120 of about 476,181 (204)

Rotational equilibrium of C₂ in diffuse interstellar clouds

Astronomy & Astrophysics
Context. Recent spectroscopic measurements have revealed absorption from higher rotational levels in C2 than previous observations. These improvements are accompanied by the availability of updated radiative and collisional data. Aims. We revisit the density and radiation field intensity diagnostics provided by the observations of many rotational ...
J. Le Bourlot, E. Roueff, S. R. Federman, A. M. Ritchey, D. L. Lambert   +4 more
openaire   +2 more sources

Inverse Raman Scattering and the Diffuse Interstellar Bands: An Exploration of the Systemic Interconnections between Spontaneous and Inverse Raman Scattering and Extended Red Emission, Red Rectangle Bands, and Diffuse Interstellar Bands

The Astrophysical Journal
First identified in 1964, inverse Raman scattering (IRS) is a nonlinear stimulated phenomenon that induces Raman-scattered absorptions where Raman emissions would be expected.
Frédéric Zagury
doaj   +1 more source

A Tale of Two Sightlines: Comparison of Hydrocarbon Dust Absorption Bands toward Cygnus OB2-12 and the Galactic Center

The Astrophysical Journal
Infrared spectra of hydrocarbon dust absorption bands toward the bright hypergiant Cygnus OB2-12 are compared to published spectra of the Quintuplet Cluster, a sightline to the Galactic center. The Cyg OB2-12 data include a new ground-based 2.86−3.70 μ m
Yvonne J. Pendleton, T. R. Geballe, Laurie E. U. Chu, Marjorie Decleir, Karl D. Gordon, A. G. G. M. Tielens, Louis J. Allamandola, Jeroen Bouwman, J. E. Chiar, Curtis Dewitt, Burcu Gunay, Thomas Henning, Vito Mennella, M. E. Palumbo, Alexey Potapov, Maisie Rashman, Sascha Zeegers   +16 more
doaj   +1 more source

Gas-phase Oxygenation and Sulfurization Processes of Fullerene Cations

The Astrophysical Journal
Atomic oxygen and sulfur are known to efficiently react with fullerenes and may thus form a long list of oxygenated and sulfurated fullerene species in the interstellar medium (ISM).
Nian Zhao, Xiaoyi Hu, Yanan Ge, Congcong Zhang, Aigen Li, Junfeng Zhen, Xuejuan Yang   +6 more
doaj   +1 more source

Método sem malha hp-clouds na análise de placas Reissner-Mindlin / [PDF]

, 1999
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.O conteúdo deste trabalho trata da aplicação do método sem malha hp-Clouds ou simplesmente método de nuvens (C. A. Duarte e J. T.
Garcia, Oscar Alfredo
core  

Putting the Diffuse Interstellar Bands on the Map – Literally!

, 2013
In a quest to further our understanding of the diffuse interstellar medium (ISM) as well as the unidentified carriers of the diffuse interstellar bands (DIBs), we are mapping DIBs across the sky using hundreds of hot stars as background torches ...
van Loon, J. Th.
core   +1 more source

Extinction Distributions in Nearby Star-resolved Galaxies. II. M33

The Astronomical Journal
Extinction maps are essential for tracing interstellar dust and enabling accurate stellar population studies in galaxies. Here, a high-resolution extinction distribution of the nearby Triangulum galaxy (M33), is constructed by fitting multiband color ...
Yuxi Wang, Yi Ren, Jian Gao, Bingqiu Chen, Ying Li   +4 more
doaj   +1 more source

A cationic carrier for the diffuse interstellar band at 862.1 nm: Evidence of the skin effect in nearby diffuse to translucent clouds

Astronomy & Astrophysics
The tendency of some diffuse interstellar band (DIB) carriers to concentrate in the outer UV-illuminated layers of molecular clouds (MCs), the so-called skin effect, makes their spatial distribution a powerful probe of their physical nature. We leveraged
Zhao H., Li L.
doaj   +1 more source

$C_{3}$ EXCITATION PROFILES IN DIFFUSE INTERSTELLAR CLOUDS

, 2003
Department of Astronomy, University of California, Berkeley, CA 94720.Author Institution: Department of Chemistry, University of California; Division of Geological and Planetary Sciences 150-21, California Institute of Technology; Department of Chemistry,
Blake, Geoffrey A., Adamkovics, M., McCall, Benjamin J.   +2 more
core   +1 more source

The Gas-phase Nitridation Processes of Fullerene Cations in the Interstellar Medium

The Astrophysical Journal
The chemical evolution of fullerene molecules is an important and interesting topic in astrochemistry. In this work, the coevolution processes occurring in fullerene cations ([C _60 ] ^+ and [C _58/56 ] ^+ ) in response to ultraviolet radiation and N ...
Yanan Ge, Congcong Zhang, Junfeng Zhen, Yuming Wang   +3 more
doaj   +1 more source