Self-similar collapse of isothermal spheres and star formation.
Citations
2,522 citations
Cites background from "Self-similar collapse of isothermal..."
...In the opposite case, considered by Shu (1977), one assumes that the evolution to the r−2 density profile is quasi-static (most likely due to the effects of magnetic fields—see below), so that the infall velocities are negligible at the moment of protostar formation....
[...]
1,752 citations
Cites background or methods from "Self-similar collapse of isothermal..."
...Considering a Shu model (Shu 1977), the wave of infall propagates outward at the sound speed until it reaches the outer bound of the region that will collapse....
[...]
...Models with mean accretion rates onto the star faster than the Shu (1977) rate are not supported by these observations....
[...]
...For the inside-out collapse model (Shu 1977), the mass infall rate is given by Ṁ = m0a 3/G, (10) with m0 = 0.975 and a is the sound speed....
[...]
...In fact, the luminosities seen in Class 0 sources are mostly similar to or less than predictions (Young & Evans 2005) of the evolution in Lbol-Tbol space based on simple inside-out collapse models (Shu 1977), with constant accretion rates and unit efficiency....
[...]
...Young & Evans (2005) did that for the standard Shu model (Shu 1977), assuming unit efficiency and spherical radiative transfer....
[...]
1,630 citations
Cites background or methods from "Self-similar collapse of isothermal..."
...As an immediate consequence of the assumed singular 1/r2 initial density profile, the Shu (1977) model predicts constant protostellar accretion rates Ṁ⋆ = 0.975c 3 s/G, with sound speed cs and gravitational constant G....
[...]
...One application of this result is that for isopedic disks the derived mass accretion rate is just a scaled version of the original Shu (1977) rate, i.e. Ṁ ≈ (1 + H0) c3s/G, with the dimensionless parameter H0 depending on the effective mass-to-flux ratio....
[...]
...The standard solution was derived by Shu (1977) considering the evolution of initially singular isothermal spheres as they leave equilibrium....
[...]
...In particular Shu (1977) proposed the self-similar collapse of initially quasi-static singular isothermal spheres as the most likely description of the star formation process....
[...]
...The basis of the Shu (1977) model is the singular isothermal sphere, i.e. the theory assumes radial density profiles ρ ∝ 1/r2 at all radii r as starting conditions of protostellar collapse....
[...]
1,470 citations
1,372 citations