Results 101 to 110 of about 49,075 (253)
The Astrophysical JournalPolarized foreground emission from the Galaxy is one of the biggest challenges facing current and upcoming cosmic microwave background (CMB) polarization experiments.
The Pan-Experiment Galactic Science Group +17 more
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Surface hydrogenation in diffuse and translucent interstellar clouds [PDF]
Astronomy & Astrophysics, 2002 We investigate the eects of grain-surface hydrogenation reactions on gas phase chemical models of diuse and translucent clouds in the interstellar medium. Models in which gas phase species freeze out on to dust without release do not match observed column densities well. Expanding on previous work we extend our models to include the release of C, N, O,
O'Neill P.T., Viti S., Williams D.A.
openaire +2 more sources
Matrix Isolation and Solvation of the Benzonitrile Radical Anion
Chemistry – A European Journal, Volume 31, Issue 35, June 23, 2025.Hydrated electrons are potent reducing agents that may play significant roles in chemical evolution within astrochemical and prebiotic environments. Benzonitrile, a molecule present in the interstellar medium (ISM), can capture electrons in amorphous water ice at cryogenic temperatures, forming a radical anion.
Shubhra Sarkar +2 more
wiley +1 more source
First ALMA Maps of Cosmic-Ray Ionization Rate in High-mass Star-forming Regions
The Astrophysical Journal Letters, 2023 Low-energy cosmic rays (
Giovanni Sabatini +2 more
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Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog
Computer Graphics Forum, Volume 44, Issue 3, June 2025.Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi +3 more
wiley +1 more source
Characterizing the 3D Structure of Molecular Cloud Envelopes in the Cloud Factory Simulations
The Astrophysical JournalWe leverage recent numerical simulations of highly resolved star-forming regions in a Milky Way–like galaxy to explore the nature of extended gaseous envelopes around molecular clouds.
Elijah Mullens +3 more
doaj +1 more source
Interstellar lithium - Differential depletion in diffuse clouds
The Astrophysical Journal, 1986 Les observations de LiId6708 ont conduit a la detection en direction de sept etoiles et a des limites en direction de quinze ...
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Modelling the spinning dust emission from dense interstellar clouds
, 2011 Electric dipole emission arising from PAHs is often invoked to explain the anomalous microwave emission (AME). This assignation is based on an observed tight correlation between the mid-IR emission of PAHs and the AME; and a good agreement between models
Ali-Haïmoud +33 more
core +2 more sources
The Hermean Helium Exosphere—Continuous and Sporadic Helium Release Processes
Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.Abstract Since its detection by Mariner 10, helium has been a key focus in studies of Mercury's exosphere. Recently, Weichbold et al. (2025), https://doi.org/10.1029/2024je008679 provided the first in situ helium measurements, inferring density from Ion Cyclotron Wave (ICW) events observed by the MESSENGER spacecraft.
J. Hener +5 more
wiley +1 more source
The Astrophysical JournalThe dominant sources of photoionizing radiation in the extreme-ultraviolet (EUV) incident on the exterior of the local interstellar clouds include two nearby early B-type stars, ϵ CMa (124 ± 2 pc) and β CMa (151 ± 5 pc), three hot dwarfs, and the Local ...
J. Michael Shull +3 more
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