Matches in SemOpenAlex for { <https://semopenalex.org/work/W1988575698> ?p ?o ?g. }
Showing items 1 to 79 of
79
with 100 items per page.
- W1988575698 endingPage "697" @default.
- W1988575698 startingPage "697" @default.
- W1988575698 abstract "The infrared absorption feature near 2950 cm-1 (3.4 micrometers), characteristic of dust in the diffuse interstellar medium (ISM), is attributed to C-H stretching vibrations of aliphatic hydrocarbons. We show here that the strength of the band does not scale linearly with visual extinction everywhere, but instead increases more rapidly for objects near the center of the Galaxy, a behavior that parallels that of the Si-O stretching band due to silicate materials in the diffuse ISM. This implies that the grains responsible for the diffuse medium aliphatic C-H and silicate Si-O stretching bands are different from those responsible for much of the observed visual extinction. It also suggests that the distribution of the carbonaceous component of the diffuse ISM is not uniform throughout the Galaxy, but instead may increase in density toward the center of the Galaxy. The similar behavior of the C-H and Si-O stretching bands suggests that these two components may be coupled, perhaps in the form of silicate-core, organic-mantle grains. Several possible models of the distribution of this material are presented and it is demonstrated that the inner parts of the Galaxy has a carrier density that is 5 to 35 times higher than in the local ISM. Depending on the model used, the density of aliphatic material in the local ISM is found to be about 1 to 2 -CH3 groups m-3 and about 2 to 5 -CH2- groups m-3. These densities are consistent with the strengths of the 2955 and 2925 cm-1 (3.38 and 3.42 micrometers) subfeatures (due to -CH3 and -CH2- groups, respectively) within the overall 2950 cm-1 (3.4 micrometers) band being described by the relations A upsilon/tau(2955 cm-1) = 270 +/- 40 and A upsilon/tau(2925 cm-1) = 250 +/- 40 in the local diffuse ISM." @default.
- W1988575698 created "2016-06-24" @default.
- W1988575698 creator A5019595886 @default.
- W1988575698 creator A5076288583 @default.
- W1988575698 creator A5076610019 @default.
- W1988575698 date "1995-02-01" @default.
- W1988575698 modified "2023-09-28" @default.
- W1988575698 title "The Galactic Distribution of Aliphatic Hydrocarbons in the Diffuse Interstellar Medium" @default.
- W1988575698 doi "https://doi.org/10.1086/175307" @default.
- W1988575698 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/11538444" @default.
- W1988575698 hasPublicationYear "1995" @default.
- W1988575698 type Work @default.
- W1988575698 sameAs 1988575698 @default.
- W1988575698 citedByCount "85" @default.
- W1988575698 countsByYear W19885756982012 @default.
- W1988575698 countsByYear W19885756982013 @default.
- W1988575698 countsByYear W19885756982014 @default.
- W1988575698 countsByYear W19885756982016 @default.
- W1988575698 countsByYear W19885756982019 @default.
- W1988575698 countsByYear W19885756982020 @default.
- W1988575698 countsByYear W19885756982022 @default.
- W1988575698 crossrefType "journal-article" @default.
- W1988575698 hasAuthorship W1988575698A5019595886 @default.
- W1988575698 hasAuthorship W1988575698A5076288583 @default.
- W1988575698 hasAuthorship W1988575698A5076610019 @default.
- W1988575698 hasBestOaLocation W19885756981 @default.
- W1988575698 hasConcept C101991246 @default.
- W1988575698 hasConcept C120665830 @default.
- W1988575698 hasConcept C121332964 @default.
- W1988575698 hasConcept C125287762 @default.
- W1988575698 hasConcept C125857072 @default.
- W1988575698 hasConcept C1276947 @default.
- W1988575698 hasConcept C132552067 @default.
- W1988575698 hasConcept C132645408 @default.
- W1988575698 hasConcept C150846664 @default.
- W1988575698 hasConcept C158355884 @default.
- W1988575698 hasConcept C190841160 @default.
- W1988575698 hasConcept C196939603 @default.
- W1988575698 hasConcept C2777335606 @default.
- W1988575698 hasConcept C44870925 @default.
- W1988575698 hasConcept C86021447 @default.
- W1988575698 hasConcept C98444146 @default.
- W1988575698 hasConceptScore W1988575698C101991246 @default.
- W1988575698 hasConceptScore W1988575698C120665830 @default.
- W1988575698 hasConceptScore W1988575698C121332964 @default.
- W1988575698 hasConceptScore W1988575698C125287762 @default.
- W1988575698 hasConceptScore W1988575698C125857072 @default.
- W1988575698 hasConceptScore W1988575698C1276947 @default.
- W1988575698 hasConceptScore W1988575698C132552067 @default.
- W1988575698 hasConceptScore W1988575698C132645408 @default.
- W1988575698 hasConceptScore W1988575698C150846664 @default.
- W1988575698 hasConceptScore W1988575698C158355884 @default.
- W1988575698 hasConceptScore W1988575698C190841160 @default.
- W1988575698 hasConceptScore W1988575698C196939603 @default.
- W1988575698 hasConceptScore W1988575698C2777335606 @default.
- W1988575698 hasConceptScore W1988575698C44870925 @default.
- W1988575698 hasConceptScore W1988575698C86021447 @default.
- W1988575698 hasConceptScore W1988575698C98444146 @default.
- W1988575698 hasLocation W19885756981 @default.
- W1988575698 hasLocation W19885756982 @default.
- W1988575698 hasOpenAccess W1988575698 @default.
- W1988575698 hasPrimaryLocation W19885756981 @default.
- W1988575698 hasRelatedWork W1534902081 @default.
- W1988575698 hasRelatedWork W1988575698 @default.
- W1988575698 hasRelatedWork W2002418785 @default.
- W1988575698 hasRelatedWork W2016589484 @default.
- W1988575698 hasRelatedWork W2052043380 @default.
- W1988575698 hasRelatedWork W2064666376 @default.
- W1988575698 hasRelatedWork W2921183255 @default.
- W1988575698 hasRelatedWork W2993522109 @default.
- W1988575698 hasRelatedWork W3102868919 @default.
- W1988575698 hasRelatedWork W4245675245 @default.
- W1988575698 hasVolume "440" @default.
- W1988575698 isParatext "false" @default.
- W1988575698 isRetracted "false" @default.
- W1988575698 magId "1988575698" @default.
- W1988575698 workType "article" @default.