Results 41 to 50 of about 30,505 (211)
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 +3 more sources
Evolution of Interstellar Clouds in Local Group Dwarf Spheroidal Galaxies in the Context of Their Star Formation Histories [PDF]
, 1999 We consider evolution of interstellar clouds in Local Group dwarf spheroidal galaxies (dSphs) in the context of their observed star formation histories.
Babul A. +11 more
core +3 more sources
Tracing the Layers of Photodissociated Gas in the Trifid Nebula
The Astrophysical JournalPhotodissociated gas bears the signature of the dynamical evolution of the ambient interstellar medium impacted by the mechanical and radiative feedback from an expanding H ii region.
Bhaswati Mookerjea, Göran Sandell
doaj +1 more source
The molecular composition of dense interstellar clouds
The Astrophysical Journal, 1977 Presented in this paper is an ab initio chemical model for dense interstellar clouds that incorporates 598 grain surface reactions, with small grains providing the reaction area. Gas-phase molecules are depleted through collisions with grains. The abundances of 372 chemical species are calculated as a function of time and are found to be of sufficient ...
M. Allen, G. W. Robinson
openaire +1 more source
Valence Threshold Photoionization Spectra of C5$_5$H and C5$_5$H2$_2$ Isomers
ChemPhysChem, Volume 27, Issue 8, 28 April 2026.Mass‐selected threshold photoelectron spectra (TPES) of l‐C5H, HC5H, and c–C3H‐CCH were recorded using double‐imaging photoelectron‐photoion coincidence spectroscopy. These transient species were generated in situ by hydrogen abstraction from cyclopropylacetylene and 1,3‐pentadiyne.
Ugo Jacovella +9 more
wiley +1 more source
Geophysical Research LettersOur solar system's path has recently been shown to potentially intersect dense interstellar clouds 2 and 7 million years ago: the Local Lynx of Cold Cloud and the edge of the Local Bubble.
Jesse A. Miller +4 more
doaj +1 more source
Dynamically dominant magnetic fields in the diffuse interstellar medium
, 2009 Observations show that magnetic fields in the interstellar medium (ISM) often do not respond to increases in gas density as would be naively expected for a frozen-in field. This may suggest that the magnetic field in the diffuse gas becomes detached from
A. Shukurov +5 more
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From Filamentary Networks to Dense Cores in Molecular Clouds: Toward a New Paradigm for Star Formation [PDF]
, 2013 Recent studies of the nearest star-forming clouds of the Galaxy at submillimeter wavelengths with the Herschel Space Observatory have provided us with unprecedented images of the initial and boundary conditions of the star formation process. The Herschel
André, Philippe +5 more
core +3 more sources
Encounters between stars and dense interstellar clouds
The Astrophysical Journal Supplement Series, 1977 From analysis of statistics of the properties of dense interstellar clouds, we show that a disk star the age of the Sun has probably passed through about 135 clouds of n (H) > or approx. =10/sup 2/ cm/sup -3/ and about 16 clouds with n (H) > or approx. =10/sup 3/ cm/sup -3/.
R. J., Jr. Talbot, M. J. Newman
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Prebiotic Organic Chemistry of Diketopiperazines
Asian Journal of Organic Chemistry, Volume 15, Issue 4, April 2026.Diketopiperazines (DKPs) are considered essential in many life forms, but their prebiotic importance has not been fully understood. This review aims to discuss prebiotic organic chemistry for experimentally and computationally simulated reactions involving DKPs. ABSTRACT Even though the significance of amino acids and polypeptides is well recognized in
Jun Ohata
wiley +1 more source