FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1985471486> ?p ?o ?g. }

• W1985471486 endingPage "346" @default.
• W1985471486 startingPage "330" @default.
• W1985471486 abstract "The gravitational collapse of a spherical cloud core is investigated by numerical calculations. The initial conditions of the core lie close to the critical Bonnor-Ebert sphere with a central density of ~104 cm-3 in one model (α = 1.1), while gravity overwhelms pressure in the other (α = 4.0), where α is the internal gravity-to-pressure ratio. The α = 1.1 model shows reasonable agreement with the observed velocity field in prestellar cores. Molecular distributions in cores are calculated by solving a chemical reaction network that includes both gas-phase and grain-surface reactions. When the central density of the core reaches 105 cm-3, carbon-bearing species are significantly depleted in the central region of the α = 1.1 model, while the depletion is only marginal in the other model. The two different approaches encompass the observed variations of molecular distributions in different prestellar cores, suggesting that molecular distributions can be probes of contraction or accumulation timescales of cores. The central enhancement of the NH3/N2H+ ratio, which is observed in some prestellar cores, can be reproduced under certain conditions by adopting recently measured branching fractions for N2H+ recombination. Various molecular species, such as CH3OH and CO2, are produced by grain-surface reactions. The ice composition depends sensitively on the assumed temperature. Multideuterated species are included in our most recent gas-grain chemical network. The deuterated isotopomers of H are useful as probes of the central regions of evolved cores, in which gas-phase species with heavy elements are strongly depleted. At 10 K, our model can reproduce the observed abundance ratio of ND3/NH3 but underestimates the isotopic ratios of deuterated to normal methanol." @default.
• W1985471486 created "2016-06-24" @default.
• W1985471486 creator A5003408098 @default.
• W1985471486 creator A5060950171 @default.
• W1985471486 creator A5089553032 @default.
• W1985471486 creator A5090718980 @default.
• W1985471486 date "2005-02-10" @default.
• W1985471486 modified "2023-10-02" @default.
• W1985471486 title "Molecular Evolution in Collapsing Prestellar Cores. III. Contraction of a Bonnor‐Ebert Sphere" @default.
• W1985471486 cites W1660889350 @default.
• W1985471486 cites W1964399574 @default.
• W1985471486 cites W1965206064 @default.
• W1985471486 cites W1966701734 @default.
• W1985471486 cites W1967045913 @default.
• W1985471486 cites W1981141806 @default.
• W1985471486 cites W1982727463 @default.
• W1985471486 cites W1988634891 @default.
• W1985471486 cites W1990598436 @default.
• W1985471486 cites W1995435934 @default.
• W1985471486 cites W2002249160 @default.
• W1985471486 cites W2002529752 @default.
• W1985471486 cites W2002889900 @default.
• W1985471486 cites W2009370555 @default.
• W1985471486 cites W2015368600 @default.
• W1985471486 cites W2015732298 @default.
• W1985471486 cites W2017518617 @default.
• W1985471486 cites W2024173203 @default.
• W1985471486 cites W2024389974 @default.
• W1985471486 cites W2026193223 @default.
• W1985471486 cites W2030392387 @default.
• W1985471486 cites W2031251030 @default.
• W1985471486 cites W2033697868 @default.
• W1985471486 cites W2033852858 @default.
• W1985471486 cites W2036550415 @default.
• W1985471486 cites W2037766454 @default.
• W1985471486 cites W2045172495 @default.
• W1985471486 cites W2045954828 @default.
• W1985471486 cites W2046418812 @default.
• W1985471486 cites W2050829508 @default.
• W1985471486 cites W2051762527 @default.
• W1985471486 cites W2052951811 @default.
• W1985471486 cites W2055530733 @default.
• W1985471486 cites W2055946019 @default.
• W1985471486 cites W2059821387 @default.
• W1985471486 cites W2060582759 @default.
• W1985471486 cites W2064674255 @default.
• W1985471486 cites W2068310343 @default.
• W1985471486 cites W2068709634 @default.
• W1985471486 cites W2073965059 @default.
• W1985471486 cites W2074365138 @default.
• W1985471486 cites W2075123673 @default.
• W1985471486 cites W2075730540 @default.
• W1985471486 cites W2079740281 @default.
• W1985471486 cites W2081611317 @default.
• W1985471486 cites W2081745671 @default.
• W1985471486 cites W2083659289 @default.
• W1985471486 cites W2104382780 @default.
• W1985471486 cites W2112548197 @default.
• W1985471486 cites W2114351830 @default.
• W1985471486 cites W2118109084 @default.
• W1985471486 cites W2124264259 @default.
• W1985471486 cites W2125144908 @default.
• W1985471486 cites W2136639202 @default.
• W1985471486 cites W2138468009 @default.
• W1985471486 cites W2138788175 @default.
• W1985471486 cites W2157142026 @default.
• W1985471486 cites W2158928281 @default.
• W1985471486 cites W2916101882 @default.
• W1985471486 cites W2952210053 @default.
• W1985471486 cites W3098107243 @default.
• W1985471486 cites W3099535293 @default.
• W1985471486 cites W3101061824 @default.
• W1985471486 cites W3102083267 @default.
• W1985471486 cites W3102398079 @default.
• W1985471486 cites W3102932167 @default.
• W1985471486 cites W3103516731 @default.
• W1985471486 cites W3104129412 @default.
• W1985471486 cites W3105135985 @default.
• W1985471486 cites W3105862129 @default.
• W1985471486 cites W3106485099 @default.
• W1985471486 cites W3122140081 @default.
• W1985471486 cites W4230343536 @default.
• W1985471486 doi "https://doi.org/10.1086/427017" @default.
• W1985471486 hasPublicationYear "2005" @default.
• W1985471486 type Work @default.
• W1985471486 sameAs 1985471486 @default.
• W1985471486 citedByCount "183" @default.
• W1985471486 countsByYear W19854714862012 @default.
• W1985471486 countsByYear W19854714862013 @default.
• W1985471486 countsByYear W19854714862014 @default.
• W1985471486 countsByYear W19854714862015 @default.
• W1985471486 countsByYear W19854714862016 @default.
• W1985471486 countsByYear W19854714862017 @default.
• W1985471486 countsByYear W19854714862018 @default.
• W1985471486 countsByYear W19854714862019 @default.
• W1985471486 countsByYear W19854714862020 @default.
• W1985471486 countsByYear W19854714862021 @default.
• W1985471486 countsByYear W19854714862022 @default.

• next