Results 91 to 100 of about 1,388 (238)

Formation of Methanol via Fischer‐Tropsch Catalysis by Cosmic Iron Sulphide

ChemPhysChem, Volume 25, Issue 17, September 2, 2024.
Periodic quantum mechanical simulations evidence the potentiality to synthesise methanol through a Fischer‐Tropsch mechanism in different astrophysical environments facilitated by the catalytic properties of cosmic FeS grains, which are enhanced by the presence of naturally‐occurring point surface defects.
Berta Martinez‐Bachs, Alexia Anguera‐Gonzalez, Gerard Pareras, Albert Rimola   +3 more
wiley   +1 more source

Thermal and maser molecular emission in infrared dark clouds [PDF]

Доклад посвящен наблюдательным проявлениям процесса звездообразования в плотных темных облаках в межзвездной среде Галактики. Приведены примеры таких проявлений, дан краткий обзор характеристик молекулярных облаков.
Шахворостова, Н. Н., Shakhvorostova, N. N.   +1 more
core   +1 more source

Rotational excitation of methanol by helium at interstellar temperatures [PDF]

, 2002
Calculations have been performed to obtain accurate cross-sections and thermally averaged rate coefficients for the rotational excitation of methanol by helium, using the Coupled States quantum-mechanical approach. Transitions within the ground and first
Pottage, James
core  

The Magnetic Field in Quiescent Star-forming Filament G16.96+0.27

The Astrophysical Journal
We present 850 μ m thermal dust polarization observations with a resolution of 14.″4 (∼0.13 pc) toward an infrared dark cloud G16.96+0.27 using James Clerk Maxwell Telescope/POL-2.
Qi-Lao Gu, Tie Liu, Zhi-Qiang Shen, Sihan Jiao, Julien Montillaud, Mika Juvela, Xing Lu, Chang Won Lee, Junhao Liu, Pak Shing Li, Xunchuan Liu, Doug Johnstone, Woojin Kwon, Kee-Tae Kim, Ken’ichi Tatematsu, Patricio Sanhueza, Isabelle Ristorcelli, Patrick Koch, Qizhou Zhang, Kate Pattle, Naomi Hirano, Dana Alina, James Di Francesco   +22 more
doaj   +1 more source

The collective origin of spiral structures in disk galaxies

EPJ Web of Conferences, 2012
After almost fifty years the origin of spiral arms in disk galaxies remains one of the major unsolved problems in astrophysics. Recent attempts have indicated that substructures in the dark matter halos of galaxies could induce spiral patterns in disks ...
Hernquist L., Vogelsberger M., D’Onghia E.   +2 more
doaj   +1 more source

3D CMZ. IV. Distinguishing Near versus Far Distances in the Galactic Center Using Spitzer and Herschel

The Astrophysical Journal
A comprehensive 3D model of the central 300 pc of the Milky Way, the Central Molecular Zone (CMZ) is of fundamental importance in understanding energy cycles in galactic nuclei, since the 3D structure influences the location and intensity of star ...
Dani Lipman, Cara Battersby, Daniel L. Walker, Mattia C. Sormani, John Bally, Ashley Barnes, Adam Ginsburg, Simon C. O. Glover, Jonathan D. Henshaw, H Perry Hatchfield, Katharina Immer, Ralf S. Klessen, Steven N. Longmore, Elisabeth A. C. Mills, Rowan Smith, R. G. Tress, Danya Alboslani, Qizhou Zhang   +17 more
doaj   +1 more source

Grain growth, optical polarisation, and extinction in interstellar clouds

, 1989
Increases in the wavelength of maximum polarization and the ratio of total to selective extinction are generally assumed to be the result of grain growth in interstellar clouds.
Jones, A. P.
core  

Methanol as a diagnostic tool of interstellar clouds

, 2007
Context.Fundamental properties of interstellar clouds must be known to investigate the initial conditions of star formation within them and the interaction of newly formed stars with their environment.
S. Leurini, K. M. Menten, P. Schilke, F. Wyrowski   +3 more
core   +1 more source

Modeling Complex Organic Molecules’ Formation in Cold Cores: Multiphase Models with Nonthermal Mechanisms

The Astrophysical Journal Supplement Series
In recent years, a significant number of oxygen-bearing complex organic molecules (COMs) have been detected in the gas phase of cold dark clouds such as TMC-1.
Yang Lu, Donghui Quan, Qiang Chang, Long-Fei Chen, Di Li   +4 more
doaj   +1 more source

Supersonic waves of magnetization in dark interstellar molecular clouds

, 2017
We suggest that supersonic linewidths inferred from recent measurements of magnetic fields toward the core position in dark interstellar molecular clouds may be due to transverse waves of magnetization propagating in a poorly ionized, magnetically ...
양종만
core