Results 91 to 100 of about 5,067 (228)

Theoretical Calculations for the Acidity of Cyanopolyynes HC2n+1N (n = 0–5) in Gas and Aqueous Phases Using Ab initio Methods

open access: yesARO-The Scientific Journal of Koya University, 2019
Cyanopolyynes have been found in the interstellar medium, cold dust cloud Taurus Molecular Cloud-1, and the Titan’s atmosphere. Theoretical calculations are carried out to predict gas and aqueous phase acidities of a series of cyanopolyynes acids.
Hassan H. Abdallah
doaj   +1 more source

INTERSTELLAR CLOUDS BY SEARCHLIGHT

open access: yesThe Astronomical Journal, 2009
Interpretation of high-resolution observations of absorption by interstellar clouds of radiation from extragalactic sources should include the effect of the Earth's motion with respect to the source. High-resolution H I absorption profiles that are not heavily blended have been published for eight sources.
openaire   +1 more source

Experiment on mass-stripping of interstellar cloud following shock passage [PDF]

open access: yes, 2006
The interaction of supernova shocks and interstellar clouds is an important astrophysical phenomenon which can lead to mass-stripping (transfer of material from cloud to surrounding flow, ''mass-loading'' the flow) and possibly increase the compression ...
Robey, H. F.   +3 more
core  

Structure of shocked gas in interstellar cloud-cloud collisions

open access: yes, 2023
The interstellar medium (ISM) has been extensively studied over the years due to its importance in galaxy evolution. It comprises dust and gas at different densities and temperatures, making it multiphase and highly turbulent. Our Galaxy has several star
Navarrete Piedra, Pablo Sebastián
core  

The Effect of an Inert Solid Reservoir on Molecular Abundances in Dense Interstellar Clouds

open access: yesOpen Astronomy, 2012
The question, what is the role of freeze-out of chemical species in determining the molecular abundances in the interstellar gas is a matter of debate.
Kalvāns Juris, Shmeld Ivar
doaj   +1 more source

The Chemistry of Cold, Dark Interstellar Clouds [PDF]

open access: yesSymposium - International Astronomical Union, 1987
In recent years the nearby cold, dark clouds have been shown to possess a rich chemistry, with interesting differences with respect to warmer massive-star-forming regions and also among the cold clouds themselves. 39 molecular species are now known in these regions.
openaire   +2 more sources

A study of X-ray point sources in Heiles Clouds 1 and 2

open access: yesActa Polytechnica
Star formation takes place in the coldest parts of molecular clouds, beginning in the densest, collapsing regions of filaments. As pre-main sequence stars are luminous X-ray emitters, X-ray point sources can serve as effective tracers of YSOs.
Nóra Varga   +2 more
doaj   +1 more source

Large Interstellar Polarisation Survey, II : UV/optical study of cloud-to-cloud variations of dust in the diffuse ISM

open access: yes, 2018
It is well known that the dust properties of the diffuse interstellar medium exhibit variations towards different sight-lines on a large scale. We have investigated the variability of the dust characteristics on a small scale, and from cloud-to-cloud. We
Bagnulo, S   +11 more
core   +1 more source

Molekul antar Bintang dan Struktur Galaksi

open access: yesJournal of Mathematical and Fundamental Sciences, 2019
Ringkasan. Tulisan ini merupakan tinjauan ulang penemuan molekul di dalam ruang antarbintang, kemungkinan pembentukannya dan kaitannya dengan struktur Galaktika. Abstract.
Bambang Hidajat
doaj  

Organic Chemistry in the H2-bearing, CO-rich Interstellar Ice Layer at Temperatures Relevant to Dense Cloud Interiors

open access: yesThe Astrophysical Journal
Ice chemistry in the dense, cold interstellar medium (ISM) is probably responsible for the formation of interstellar complex organic molecules (COMs). Recent laboratory experiments performed at T ∼ 4 K have shown that irradiation of CO:N _2 ice samples ...
Rafael Martín-Doménech   +3 more
doaj   +1 more source

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