Matches in SemOpenAlex for { <https://semopenalex.org/work/W3121654340> ?p ?o ?g. }
- W3121654340 endingPage "259" @default.
- W3121654340 startingPage "245" @default.
- W3121654340 abstract "We discuss molecular cloud formation by large-scale supersonic compressions in the diffuse warm neutral medium (WNM). Initially, a shocked layer forms, and within it, a thin cold layer. An analytical model and high-resolution one-dimensional simulations predict the thermodynamic conditions in the cold layer. After ~1 Myr of evolution, the layer has column density ~2.5 × 1019 cm-2, thickness ~0.03 pc, temperature ~25 K, and pressure ~6650 K cm-3. These conditions are strongly reminiscent of those recently reported by Heiles and coworkers for cold neutral medium sheets. In the one-dimensional simulations, the inflows into the sheets produce line profiles with a central line of width ~0.5 km s-1 and broad wings of width ~1 km s-1. Three-dimensional numerical simulations show that the cold layer develops turbulent motions and increases its thickness until it becomes a fully three-dimensional turbulent cloud. Fully developed turbulence arises on times ranging from ~7.5 Myr for inflow Mach number M1,r = 2.4 to >80 Myr for M1,r = 1.03. These numbers should be considered upper limits. The highest density turbulent gas (HDG, n > 100 cm-3) is always overpressured with respect to the mean WNM pressure by factors of 1.5-4, even though we do not include self-gravity. The intermediate-density gas (IDG, 10 < n/cm-3 < 100) has a significant pressure scatter that increases with M1,r, so that at M1,r = 2.4 a significant fraction of the IDG is at a higher pressure than the HDG. Our results suggest that the turbulence and at least part of the excess pressure in molecular clouds can be generated by the compressive process that forms the clouds themselves and that thin CNM sheets may be formed transiently by this mechanism, when the compressions are only weakly supersonic." @default.
- W3121654340 created "2021-02-01" @default.
- W3121654340 creator A5014092499 @default.
- W3121654340 creator A5034400390 @default.
- W3121654340 creator A5046035873 @default.
- W3121654340 creator A5050287381 @default.
- W3121654340 creator A5077272465 @default.
- W3121654340 date "2006-05-20" @default.
- W3121654340 modified "2023-10-16" @default.
- W3121654340 title "Molecular Cloud Evolution. I. Molecular Cloud and Thin Cold Neutral Medium Sheet Formation" @default.
- W3121654340 cites W1554497720 @default.
- W3121654340 cites W1555692581 @default.
- W3121654340 cites W1562948754 @default.
- W3121654340 cites W1574502666 @default.
- W3121654340 cites W1598050145 @default.
- W3121654340 cites W1667622720 @default.
- W3121654340 cites W1964302090 @default.
- W3121654340 cites W1965115358 @default.
- W3121654340 cites W1968137411 @default.
- W3121654340 cites W1969008921 @default.
- W3121654340 cites W1971139129 @default.
- W3121654340 cites W1976676831 @default.
- W3121654340 cites W1977182155 @default.
- W3121654340 cites W1978782810 @default.
- W3121654340 cites W1981682374 @default.
- W3121654340 cites W1989430344 @default.
- W3121654340 cites W1990913428 @default.
- W3121654340 cites W1993244509 @default.
- W3121654340 cites W1993783497 @default.
- W3121654340 cites W1995371236 @default.
- W3121654340 cites W2001401569 @default.
- W3121654340 cites W2008105377 @default.
- W3121654340 cites W2008783600 @default.
- W3121654340 cites W2009802717 @default.
- W3121654340 cites W2026357841 @default.
- W3121654340 cites W2032072360 @default.
- W3121654340 cites W2051762527 @default.
- W3121654340 cites W2056820537 @default.
- W3121654340 cites W2061812541 @default.
- W3121654340 cites W2062586500 @default.
- W3121654340 cites W2067886648 @default.
- W3121654340 cites W2069093327 @default.
- W3121654340 cites W2069450153 @default.
- W3121654340 cites W2072594483 @default.
- W3121654340 cites W2073147034 @default.
- W3121654340 cites W2073363692 @default.
- W3121654340 cites W2074324846 @default.
- W3121654340 cites W2078091601 @default.
- W3121654340 cites W2078121739 @default.
- W3121654340 cites W2081611317 @default.
- W3121654340 cites W2082011172 @default.
- W3121654340 cites W2091290989 @default.
- W3121654340 cites W2091883957 @default.
- W3121654340 cites W2093037520 @default.
- W3121654340 cites W2094883172 @default.
- W3121654340 cites W2098986009 @default.
- W3121654340 cites W2110609764 @default.
- W3121654340 cites W2123177123 @default.
- W3121654340 cites W2137198896 @default.
- W3121654340 cites W2159644995 @default.
- W3121654340 cites W2180236829 @default.
- W3121654340 cites W2951458773 @default.
- W3121654340 cites W3098131598 @default.
- W3121654340 cites W3098252667 @default.
- W3121654340 cites W3099037922 @default.
- W3121654340 cites W3099219691 @default.
- W3121654340 cites W3099495126 @default.
- W3121654340 cites W3099926020 @default.
- W3121654340 cites W3101690914 @default.
- W3121654340 cites W3102491785 @default.
- W3121654340 cites W3102532764 @default.
- W3121654340 cites W3103692162 @default.
- W3121654340 cites W3103970226 @default.
- W3121654340 cites W3104817366 @default.
- W3121654340 cites W3105549302 @default.
- W3121654340 cites W3106538065 @default.
- W3121654340 cites W3124706624 @default.
- W3121654340 cites W4241312441 @default.
- W3121654340 cites W4254810513 @default.
- W3121654340 doi "https://doi.org/10.1086/502710" @default.
- W3121654340 hasPublicationYear "2006" @default.
- W3121654340 type Work @default.
- W3121654340 sameAs 3121654340 @default.
- W3121654340 citedByCount "223" @default.
- W3121654340 countsByYear W31216543402012 @default.
- W3121654340 countsByYear W31216543402013 @default.
- W3121654340 countsByYear W31216543402014 @default.
- W3121654340 countsByYear W31216543402015 @default.
- W3121654340 countsByYear W31216543402016 @default.
- W3121654340 countsByYear W31216543402017 @default.
- W3121654340 countsByYear W31216543402018 @default.
- W3121654340 countsByYear W31216543402019 @default.
- W3121654340 countsByYear W31216543402020 @default.
- W3121654340 countsByYear W31216543402021 @default.
- W3121654340 countsByYear W31216543402022 @default.
- W3121654340 countsByYear W31216543402023 @default.
- W3121654340 crossrefType "journal-article" @default.
- W3121654340 hasAuthorship W3121654340A5014092499 @default.