Results 111 to 120 of about 37,732 (195)

Dust Processing in the Interstellar Medium [PDF]

Proceedings of The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments — PoS(LCDU2013), 2014
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Plasma generation and high energy electron processing of interstellar carbonaceous dust analogs

, 2017
Santiago de Compostela, Facultade de Química,17-21 julio 2017. -- http://www.bienalrsef2017.com/bienalrsef17/ Carbonaceous compounds are found in very diverse astronomical media [1], a significant amount consisting in small dust grains. This dust originates characteristic IR absorption bands revealing the presence of aliphatic and aromatic ...
Tanarro, Isabel, Herrero, Víctor J., Maté, Belén, Peláez, Ramón J., Molpeceres, Germán, Timón, Vicente, Escribano, Rafael, Jiménez-Redondo, Miguel   +7 more
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Photocleavage of Aliphatic C–C Bonds in the Interstellar Medium

The Astrophysical Journal
Ultraviolet (UV) processing in the interstellar medium (ISM) induces the dehydrogenation of hydrocarbons. Aliphatics, including alkanes, are present in different interstellar environments, being prevalently formed in evolved stars; thus, the ...
Guillermo Tajuelo-Castilla, Jesús I. Mendieta-Moreno, Mario Accolla, Jesús M. Sobrado, Sofia Canola, Pavel Jelínek, Gary J. Ellis, José Ángel Martín-Gago, Gonzalo Santoro   +8 more
doaj   +1 more source

Analogs of interstellar carbonaceous dust: processing by electron bombardment and theoretical modeling

, 2016
Workshop on interstellar matter (ILTS Symposium); Institute of Low Temperature Science, University Sapporo, Hokkaido (Japan); 19-21 October, 2016 Observational evidence, based on IR absorption spectra, indicates that interstellar (IS) carbonaceous dust in the diffuse interstellar medium is largely made of some sort of hydrogenated amorphous
Herrero, Víctor J., Molpeceres, Germán, Maté, Belén, Timón, Vicente, Jiménez-Redondo, Miguel, Tanarro, Isabel   +5 more
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Proposed Importance of HOCO Chemistry: Inefficient Formation of CO2 from CO and OH Reactions on Ice Dust

The Astrophysical Journal
With the advent of JWST ice observations, dedicated studies on the formation reactions of detected molecules are becoming increasingly important. One of the most interesting molecules in interstellar ice is CO _2 .
Atsuki Ishibashi, Germán Molpeceres, Hiroshi Hidaka, Yasuhiro Oba, Thanja Lamberts, Naoki Watanabe   +5 more
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Sensitivity of Polarization to Grain Shape. II. Aggregates

The Astrophysical Journal
A previous study (Paper I) investigated the polarization properties of a variety of simple convex grain shapes, some of which were found to be consistent with the observed polarization properties of interstellar dust from far-ultraviolet to far-infrared.
B. T. Draine
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Probing 3D Magnetic Fields Using Thermal Dust Polarization and Grain Alignment Theory

The Astrophysical Journal
Magnetic fields are ubiquitous in the Universe and are thought to play an important role in various astrophysical processes. Polarization of thermal emission from dust grains aligned with the magnetic field is widely used to measure the 2D magnetic field
Thiem Hoang, Bao Truong
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Polycyclic Aromatic Hydrocarbon Emission in the Central Regions of Three Seyferts and the Implication for Underlying Feedback Mechanisms

The Astrophysical Journal Letters
We analyze JWST Mid-Infrared Instrument/Medium Resolution Spectrograph integral field unit observations of three Seyferts from the Galactic Activity, Torus, and Outflow Survey (GATOS) and showcase the intriguing polycyclic aromatic hydrocarbon (PAH) and ...
Lulu Zhang, Ismael García-Bernete, Chris Packham, Fergus R. Donnan, Dimitra Rigopoulou, Erin K. S. Hicks, Ric I. Davies, Taro T. Shimizu, Almudena Alonso-Herrero, Cristina Ramos Almeida, Miguel Pereira-Santaella, Claudio Ricci, Andrew J. Bunker, Mason T. Leist, David J. Rosario, Santiago García-Burillo, Laura Hermosa Muñoz, Francoise Combes, Masatoshi Imanishi, Alvaro Labiano, Donaji Esparza-Arredondo, Enrica Bellocchi, Anelise Audibert, Lindsay Fuller, Omaira González-Martín, Sebastian Hönig, Takuma Izumi, Nancy A. Levenson, Enrique López-Rodríguez, Daniel Rouan, Marko Stalevski, Martin J. Ward   +31 more
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The Ultraviolet Slopes of Early Universe Galaxies: The Impact of Bursty Star Formation, Dust, and Nebular Continuum Emission

The Astrophysical Journal
JWST has enabled the detection of the ultraviolet (UV) continuum of galaxies at z > 10, revealing extremely blue, potentially dust-free galaxies. However, interpreting UV spectra is complicated by the well-known degeneracy between stellar ages, dust ...
Desika Narayanan, Daniel P. Stark, Steven L. Finkelstein, Paul Torrey, Qi Li, Fergus Cullen, Micheal W. Topping, Federico Marinacci, Laura V. Sales, Xuejian Shen, Mark Vogelsberger   +10 more
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Binding Energies of Interstellar Complex Organic Molecules on Water Ice Surfaces: A Quantum Chemical Investigation

The Astrophysical Journal
Interstellar dust grains are enveloped by ices of frozen molecules in cold, dense regions of the interstellar medium (ISM), which are also observed in the gas phase. Whether a species is in the solid or gaseous state is governed by its binding energy (BE)
Harjasnoor Kakkar, Berta Martínez-Bachs, Cecilia Ceccarelli, Piero Ugliengo, Albert Rimola   +4 more
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