Table 3.
Visual extinction (AV) values calculated using the ratio [Fe II] 1.644/1.257 μm and mass accretion rates (Ṁacc) calculated from the Brγ and Paβ line luminosities using the relation from Alcalá et al. (2017).
| AV | Lacc, Brγ (L⊙) | Ṁacc,Brγ (M⊙ yr−1) | Lacc, Paβ (L⊙) | Ṁacc,Paβ (M⊙ yr−1) | Ṁacc,avg (M⊙ yr−1) | |
|---|---|---|---|---|---|---|
| 2005 | 15 ± 1 | 0.039 ± 0.007 | (2.1 ± 0.4) × 10−8 | 0.023 ± 0.009 | (1.2 ± 0.5) × 10−8 | (1.7 ± 0.5) × 10−8 |
| 2013 | 24 ± 1 | 0.68 ± 0.09 | (3.6 ± 0.5) × 10−7 | 0.29 ± 0.08 | (1.5 ± 0.4) × 10−7 | (2.6 ± 0.5) × 10−7 |
Notes. Ṁacc,avg is the average of the Ṁacc found from the Brγ and Paβ lines.
The errors propagated for the Ṁacc for both Paβ and Brγ are underestimates, as the errors present in the conversion from line flux to accretion luminosity (the a and b values found in Alcalá et al. 2017) were omitted in order to compare the values found in the different epochs (which would be affected the same way by this conversion). This remains valid when comparing the values of Ṁacc found from the same line over two different periods. However, in order to compare between the values of Ṁacc found from two different lines, these errors on a and b would need to be taken into consideration, and the result would be a much larger error bar for the Ṁacc values that would bring the measurements from Brγ and Paβ into agreement. Here, the former is preferred.
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