FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1976488045> ?p ?o ?g. }

• W1976488045 abstract "We show two-dimensional numerical simulations of the gravitational collapse of rotating gas clouds. We assume the polytropic equation of state, P = Kργ, to take account of the temperature change during the collapse. Our numerical simulations have two model parameters, β and γ, which specify the initial rotation velocity and polytropic index, respectively. We show three models, β = 1.0, 0.5, and 0.2, for each γ, which is taken to be 0.8, 0.9, 0.95, 1.05, 1.1, or 1.2. These 18 models are compared with previously reported isothermal models (γ = 1). In each model a rotating cylindrical cloud initially in equilibrium fragments periodically because of the growth of a velocity perturbation and forms cloud cores. The cloud core becomes a dynamically collapsing gaseous disk whose central density (ρc) increases with time (t) in proportion to ρc ∝ (t - t0)-2. This collapse is qualitatively similar in density and velocity distributions to the runaway collapse of a rotating isothermal cloud. The surface density of the disk, Σ, is proportional to the power of the radial distance, Σ(r) ∝ r1-2γ, in the envelope. Models with γ > 1 have geometrically thick disks (aspect ratio rd/zd 2), while those with γ 10). While the former disks are stable, the latter disks are unstable against fragmentation if we adopt the Toomre stability criterion for a thin gaseous disk. Our numerical simulations also show the growth of a rotationally supported disk by radial accretion in a period t > t0 for models with γ > 1. The accretion phase starts at a stage in which the central density is still finite. The central density at the beginning of the accretion phase is lower when β and γ are larger. Our models with γ 1 are applicable to star formation in primordial clouds in which the temperature increase during the collapse is due to less efficient cooling." @default.
• W1976488045 created "2016-06-24" @default.
• W1976488045 creator A5015753674 @default.
• W1976488045 creator A5027187535 @default.
• W1976488045 creator A5073101010 @default.
• W1976488045 date "2000-03-10" @default.
• W1976488045 modified "2023-09-27" @default.
• W1976488045 title "Collapse of Rotating Gas Clouds and Formation of Protostellar Disks: Effects of Temperature Change during Collapse" @default.
• W1976488045 cites W1509420341 @default.
• W1976488045 cites W1540491343 @default.
• W1976488045 cites W1965613582 @default.
• W1976488045 cites W1968137411 @default.
• W1976488045 cites W1976363737 @default.
• W1976488045 cites W1977111510 @default.
• W1976488045 cites W1985684775 @default.
• W1976488045 cites W1986709613 @default.
• W1976488045 cites W1987345304 @default.
• W1976488045 cites W1990895464 @default.
• W1976488045 cites W1994901469 @default.
• W1976488045 cites W2002969639 @default.
• W1976488045 cites W2004122402 @default.
• W1976488045 cites W2004433572 @default.
• W1976488045 cites W2006409227 @default.
• W1976488045 cites W2007749612 @default.
• W1976488045 cites W2026610764 @default.
• W1976488045 cites W2030510723 @default.
• W1976488045 cites W2031459871 @default.
• W1976488045 cites W2035547408 @default.
• W1976488045 cites W2036179433 @default.
• W1976488045 cites W2050514280 @default.
• W1976488045 cites W2060265324 @default.
• W1976488045 cites W2060660427 @default.
• W1976488045 cites W2064528785 @default.
• W1976488045 cites W2067677202 @default.
• W1976488045 cites W2067827212 @default.
• W1976488045 cites W2069285722 @default.
• W1976488045 cites W2069359777 @default.
• W1976488045 cites W2074529843 @default.
• W1976488045 cites W2075123673 @default.
• W1976488045 cites W2080886544 @default.
• W1976488045 cites W2081287082 @default.
• W1976488045 cites W2087207733 @default.
• W1976488045 cites W2100758318 @default.
• W1976488045 cites W2129495060 @default.
• W1976488045 cites W2141096859 @default.
• W1976488045 cites W2145775083 @default.
• W1976488045 cites W2157142026 @default.
• W1976488045 cites W3106353668 @default.
• W1976488045 cites W3182783684 @default.
• W1976488045 cites W4245037559 @default.
• W1976488045 doi "https://doi.org/10.1086/308493" @default.
• W1976488045 hasPublicationYear "2000" @default.
• W1976488045 type Work @default.
• W1976488045 sameAs 1976488045 @default.
• W1976488045 citedByCount "18" @default.
• W1976488045 countsByYear W19764880452012 @default.
• W1976488045 countsByYear W19764880452013 @default.
• W1976488045 countsByYear W19764880452014 @default.
• W1976488045 countsByYear W19764880452015 @default.
• W1976488045 countsByYear W19764880452019 @default.
• W1976488045 countsByYear W19764880452020 @default.
• W1976488045 crossrefType "journal-article" @default.
• W1976488045 hasAuthorship W1976488045A5015753674 @default.
• W1976488045 hasAuthorship W1976488045A5027187535 @default.
• W1976488045 hasAuthorship W1976488045A5073101010 @default.
• W1976488045 hasConcept C118396296 @default.
• W1976488045 hasConcept C121332964 @default.
• W1976488045 hasConcept C1276947 @default.
• W1976488045 hasConcept C133347239 @default.
• W1976488045 hasConcept C134853933 @default.
• W1976488045 hasConcept C142475440 @default.
• W1976488045 hasConcept C2776401274 @default.
• W1976488045 hasConcept C44870925 @default.
• W1976488045 hasConcept C57879066 @default.
• W1976488045 hasConcept C97355855 @default.
• W1976488045 hasConceptScore W1976488045C118396296 @default.
• W1976488045 hasConceptScore W1976488045C121332964 @default.
• W1976488045 hasConceptScore W1976488045C1276947 @default.
• W1976488045 hasConceptScore W1976488045C133347239 @default.
• W1976488045 hasConceptScore W1976488045C134853933 @default.
• W1976488045 hasConceptScore W1976488045C142475440 @default.
• W1976488045 hasConceptScore W1976488045C2776401274 @default.
• W1976488045 hasConceptScore W1976488045C44870925 @default.
• W1976488045 hasConceptScore W1976488045C57879066 @default.
• W1976488045 hasConceptScore W1976488045C97355855 @default.
• W1976488045 hasLocation W19764880451 @default.
• W1976488045 hasOpenAccess W1976488045 @default.
• W1976488045 hasPrimaryLocation W19764880451 @default.
• W1976488045 hasRelatedWork W1965613582 @default.
• W1976488045 hasRelatedWork W1965728204 @default.
• W1976488045 hasRelatedWork W1974671582 @default.
• W1976488045 hasRelatedWork W1985684775 @default.
• W1976488045 hasRelatedWork W1987345304 @default.
• W1976488045 hasRelatedWork W1990913428 @default.
• W1976488045 hasRelatedWork W2005631644 @default.
• W1976488045 hasRelatedWork W2014054058 @default.
• W1976488045 hasRelatedWork W2027864639 @default.
• W1976488045 hasRelatedWork W2033318843 @default.
• W1976488045 hasRelatedWork W2036179433 @default.
• W1976488045 hasRelatedWork W2040912209 @default.

• next