L1448-2A: overview of the modeling results.
|Model||d.o.f.||Rout||Ri||p + q||FTot||ΘGauss||FGauss|
|Pl||27||18 ± 4||0.01b||2.27 ± 0.1||527 ± 30||–||–||1.0|
|PG||25||20 ± 10||0.09 ± 0.01||2.22 ± 0.1||538 ± 100||0.06 ± 0.2||12 ± 3||1.0|
|PGt||26||18 ± 5||0.1 ± 0.1||2.0 ± 0.1||426 ± 39||0.1 ± 0.1||42||16|
|Pleq||14||15b||0.01b||2.28 ± 0.1||509 ± 15||–||–||0.37|
|PGeq||12||20 ± 1||0.05 ± 0.01||2.3 ± 0.2||555 ± 41||0.01b||11 ± 4||0.67|
|Pl||22||25a||0.01b||2.21 ± 0.2||58 ± 5||–||–||1.0|
|PG||20||22 ± 2||0.01b||2.0 ± 0.1||60a||0.01b||2.19 ± 0.5||0.9|
Notes. Best-fit parameters for all models with which we attempted to reproduce the dust continuum visibilities profile of L1448-2A. Column 1: model identifier, Col. 2: number of degrees of freedom we used for the modeling, Col. 3: outer radius of the truncated Plummer envelope model, Col. 4: inner radius, Col. 5: value of the (p + q) brightness radial distribution index, and Col. 6: total flux in the model (sum of the Plummer envelope and Gaussian component if PG model). Columns 7 and 8: FWHM and flux of the additional Gaussian component for PG models, respectively, Col. 9: reduced χ2 value for each model. In models Pl and PG, all parameters were let freeto vary (within the ranges described in the text) and all visibilities were used, that is, we traced the continuum emission in all directions around the peak of the millimeter dust continuum emission. PGf reports the parameters of the best-fit PG model we obtained when the envelope parameters were fixed to those from the best-fit Plummer-only model (with all visibilities; reported in Pl). PGt reports the parameters of the best-fit PG model we obtained when the Gaussian component flux was tied to the envelope flux (forcing it to be 10% of the total flux). In the Pleq and PGeq models, all parameters were let free to vary (within the ranges described in the text), but we only used the visibilities from the uv-plane that traced the direction of the equatorial plane (PA − 80° ± 30° for L1448-2A). (a)When the parameter value is the upper limit that is allowed by the fitting procedure. (b)The parameter value is the lower limit that is allowed by the fitting procedure. (c)The parameter was fixed during the minimization process.
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