Table 1.
Epochs 4 and 5 best-fit parameters for single-line P Cygni (with free-to-vary central wavelength) and for the yttrium P Cygni model.
| v⊥ | vphot | vmax | ve | τ | λ0 (μm) | |
|---|---|---|---|---|---|---|
| Single P Cygni | ||||||
| Epoch 4 |
 |
 |
 |
 |
 |
 |
| Epoch 5 |
 |
 |
 |
 |
 |
 |
| v⊥ | vphot | vmax | ve | τavg | ||
| Y+ P Cygni from 4d5p–4d2 line-transitions with λ ∈ [726 nm; 788 nm] | ||||||
| Epoch 4 |
 |
 |
 |
 |
 |
|
| Epoch 5 |
 |
 |
 |
 |
 |
|
Notes. This includes (1) the best-fit cross-sectional velocity inferred from the blackbody radii assuming Planck cosmology, v⊥, and several parameters of the P Cygni feature, including (2) the photospheric velocity, vphot, (3) the maximum outer ejecta velocity, vmax, (4) the e-folding scale of the optical depth, ve, (5) the optical depth of the line at the photospheric velocity, τ, and (6) the central wavelength, λ0. The uncertainties are derived from the 16th and 84th percentile and only include the statistical uncertainties in the fitting framework; i.e., they do not include the potentially significant systematic effects from line-blending and reverberation effects (see Sneppen et al. 2023a). All velocities are given in units of the speed of light, c.
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.