Results 21 to 30 of about 37,732 (195)

Internal and External Alignment of Carbonaceous Grains within the Radiative Torque Paradigm

The Astrophysical Journal, 2023
We study the internal and external alignment of carbonaceous grains in the interstellar medium (ISM) within the Radiative Torque (RAT) paradigm.
Thiem Hoang, Vo Hong Minh Phan, Le Ngoc Tram   +2 more
doaj   +1 more source

INDUCING INTRINSIC γ-RAY EMISSION OF THE INTERSTELLAR MEDIUM BY INTENSE FLUXES OF PROTONS AND α-PARTICLES IN ACTIVE GALACTIC NUCLEI

Odessa Astronomical Publications, 2020
Cosmic-ray induced γ-ray emission in active galactic nuclei (AGN) has been examined in this study for the first time. Cross-sections for the formation of γ-quanta in such cosmic-ray collisions were selected in the 1-150 MeV energy range.
D. N. Doikov
doaj   +1 more source

Ice Age: Chemodynamical Modeling of Cha-MMS1 to Predict New Solid-phase Species for Detection with JWST

The Astrophysical Journal, 2022
Chemical models and experiments indicate that interstellar dust grains and their ice mantles play an important role in the production of complex organic molecules (COMs).
Miwha Jin, Ka Ho Lam, Melissa K. McClure, Jeroen Terwisscha van Scheltinga, Zhi-Yun Li, Adwin Boogert, Eric Herbst, Shane W. Davis, Robin T. Garrod   +8 more
doaj   +1 more source

Interstellar Carbonaceous Dust Erosion Induced by X-Ray Irradiation of Water Ice in Star-forming Regions

The Astrophysical Journal, 2023
The chemical inventory of protoplanetary midplanes is the basis for forming planetesimals. Among them, solid-state reactions based on CO/CO _2 toward molecular complexity on interstellar dust grains have been studied in theoretical and laboratory work ...
K.-J. Chuang, C. Jäger, N.-E. Sie, C.-H. Huang, C.-Y. Lee, Y.-Y. Hsu, Th. Henning, Y.-J. Chen   +7 more
doaj   +1 more source

The global dust SED: Tracing the nature and evolution of dust with DustEM [PDF]

, 2010
The Planck and Herschel missions are currently measuring the farIR-mm emission of dust, which combined with existing IR data, will for the first time provide the full SED of the galactic ISM dust emission with an unprecedented sensitivity and angular ...
A. Jones, Adamson, Agladze, Arendt, Asplund, Banhart, Bauschlicher, Bernard, Berné, Bohlin, Boudet, Boulanger, Boulanger, Cardelli, Cayrel, Cecchi-Pestellini, Chiar, Chlewicki, Colangeli, Compiègne, D. Paradis, Dartois, Dartois, Dartois, Demyk, Dickinson, Draine, Draine, Draine, Draine, Draine, Draine, Draine, Duley, Duley, Dupac, Dwek, Désert, Désert, Désert, F. Boulanger, Fitzpatrick, Fitzpatrick, Flagey, Flagey, Frisch, Giard, Gillmon, Goto, Greenberg, Hoang, Iatì, J. Le Bourlot, J.-P. Bernard, Jones, Jones, Jones, Jones, Juvela, Jäger, Kalberla, Kemper, Kim, Kim, L. Verstraete, Li, Li, Li, Li, Li, Lillie, M. Compiègne, Malloci, Mathis, Mathis, Mathis, Mathis, Mennella, Mennella, Mennella, Meny, Meyer, Micelotta, Micelotta, Michelsen, Morgan, N. Flagey, N. Ysard, Paradis, Paradis, Petrie, Pety, Pino, Podio, Rachford, Rapacioli, Reynolds, Reynolds, Serra Díaz-Cano, Shetty, Shetty, Siebenmorgen, Sironi, Slavin, Snow, Sofia, Stecher, Steglich, Stepnik, Tielens, Verstraete, Weingartner, Weingartner, Welty, Ysard, Zhukovska, Zubko, Zubko   +117 more
core   +5 more sources

Shock processing of interstellar dust - Diamonds in the sky

The Astrophysical Journal, 1987
The processing of interstellar dust grains by strong shock waves is studied, with the emphasis on the effects of grain-grain collisions. Such collisions provide the high pressures required to transform interstellar graphite and amorphous carbon grains into diamonds. Diamond metamorphism is as important for the destruction of such grains as vaporization
A. G. G. M. Tielens, C. G. Seab, D. J. Hollenbach, Christopher F. McKee   +3 more
openaire   +1 more source

Joint Modelling of Dust Scattering and Thermal Emission: The Spider Complex

The Astrophysical Journal, 2023
Observations across the electromagnetic spectrum of radiative processes involving interstellar dust—emission, absorption, and scattering—are used to constrain the parameters of dust models and more directly to aid in foreground removal of dust for ...
Jielai Zhang, Peter G. Martin, Ryan Cloutier, Natalie Price-Jones, Roberto Abraham, Pieter van Dokkum, Allison Merritt   +6 more
doaj   +1 more source

Looking for the bricks of the life in the interstellar medium: The fascinating world of astrochemistry [PDF]

EPJ Web of Conferences, 2020
The discovery in the interstellar medium of molecules showing a certain degree of complexity, and in particular those with a prebiotic character, has attracted great interest.
Barone Vincenzo, Puzzarini Cristina
doaj   +1 more source

Effects of Barnett Magnetic Dipole–Dipole Interaction on Grain Growth and Destruction

The Astrophysical Journal, 2023
Rapidly spinning magnetic grains can acquire large magnetic dipole moments due to the Barnett effect. Here we study the new effect of Barnett magnetic dipole–dipole interaction on grain–grain collisions and grain growth, assuming that grains are spun up ...
Thiem Hoang, Bao Truong
doaj   +1 more source

Dust in protoplanetary disks: observations*

EPJ Web of Conferences, 2015
Solid particles, usually referred to as dust, are a crucial component of interstellar matter and of planet forming disks surrounding young stars. Despite the relatively small mass fraction of ≈1% (in the solar neighborhood of our galaxy; this number may ...
Waters L.B.F.M.
doaj   +1 more source