Table 1.
Comparison and scalability between the laser-driven plasma stream and a range of possible YSO accretion inflows (as described in Sect. 3.1).
PEARL | YSOsmin | YSOsmax (i) | |
---|---|---|---|
Material | CF2 (Teflon) | H | H |
Z | 6 | 1 | 1 |
A | 17.3 | 1.3 | 1.3 |
B [G] | 1.4 × 105 | 35 | 350 |
L [cm] | 1 | 2 × 1011 | 5 × 1011 |
ne[cm−3] | 5 × 1017 | 1013 | 1014 |
ρ[g.cm−3] | 2.4 × 10−6 | 2.1 × 10−11 | 2.1 × 10−10 |
Te[kK] | 500 | 1 | 10 |
Ti[kK] | 500 | 1 | 10 |
Vflow[km.s−1] | 100 | 10 | 30 |
CS[km.s−1] | 53 | 5 | 15 |
VA[km.s−1] | 245 | 22 | 68 |
le[cm] | 10−3 | 2.3 × 10−3 | 1.5 × 10−2 |
li[cm] | 4 × 10−5 | 3.2 × 10−3 | 2.1 × 10−2 |
τcol e[ns] | 3.8 × 10−3 | 0.2 | 0.4 |
τcol i[ns] | 2.7 × 10−2 | 13 | 27 |
![]() |
9.6 | 210 | 450 |
RLe[cm] | 1.2 × 10−4 | 2 × 10−2 | 6.2 × 10−3 |
RLi[cm] | 3.4 × 10−3 | 1 | 0.3 |
fce[s−1] | 3.8 × 1011 | 108 | 109 |
fci[s−1] | 7.1 × 107 | 4.2 × 104 | 4.2 × 105 |
M | 1.9 | 1.9 | 1.9 |
Malf | 0.4 | 0.4 | 0.4 |
τη[ns] | 6.7 × 103 | 2.6 × 1023 | 3.5 × 1025 |
ReM | 67 | 1.2 × 109 | 2 × 1011 |
Re | 1.6 × 105 | 2.2 × 1014 | 8.1 × 1013 |
Pe | 13 | 3.9 × 1012 | 1.4 × 1012 |
Eu | 2.5 | 2.5 | 2.5 |
β | 5.5 × 10−2 | 5.5 × 10−2 | 5.5 × 10−2 |
Notes. (i)The primary parameters are in bold, and the remaining numbers are derived from the primary numbers. The symbols are as follows: Z is the charge state, A is the mass number, B is the magnetic field, L is the spatial scale, ne is the electron density, ρ is the mass density, Te is the electron temperature, Ti is the ion temperature, Vflow is the stream velocity, CS is the sound velocity, VA is the Alfven velocity (VA = , where ni is the ion density and mi is the ion mass), le is the collisional electron mean free path, τcol e is the electron collision time, RLe is the electron Larmor radius, fce is the electron gyrofrequency, li is the collisional ion mean free path, τcol i is the ion collision time,
[ns] is the electron-ion equilibration time, RLi is the ion Larmor radius, fci is the ion gyrofrequency, M is the Mach number, Malf is the Alfven Mach number (Malf = V/VA), τη is the magnetic diffusion time (τη = L2/η, where η is the magnetic diffusivity), ReM is the magnetic Reynolds number (ReM = LV/η), Re is the Reynolds number (Re = LV/ν, where ν is the kinematic viscosity), Pe is the Peclet number (Pe = LV/χ, where χ is the thermal diffusivity), Eu is the Euler number, and β is the plasma beta.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.