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1. Correction to Table 1
Table 1 as it appeared in Zavala et al. (2010) contained errors in the expected angular diameters for the three stars of the Algol triple system. This was an error in transcribing the data to the table only. The correct expected diameters were used in the analysis and model fitting. A corrected version of Table 1 appears here.
Table 1. Adopted and Derived System Parameters
| Parameters | Stellar Component | ||
|---|---|---|---|
| A | B | C | |
| D (mas) | 0.98 | 1.2 | 0.58 |
| Mass (M⊙)a | 3.7 ± 0.3 | 0.81 ± 0.05 | 1.6 ± 0.1 |
 (K)a
|
13000 | 4500 | 7500 |
| log g | 4.0 | 3.5 | 4.5 |
Note. Values for diameters calculated as described in Section 3. The log(g) values are from Richards (1993) rounded to match the atmosphere models we used. Diameter, 
and log g were fixed during the model fitting. The masses here were initial estimates in the model fitting, and the final mass results and uncertainties are listed in Table 3.
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2. Correction to Dynamical Parallax and Semimajor Axis of Algol AB-C
An error was found in the code that performs the orbital fitting. There was no constraint in the orbital fitting so that the dynamical parallaxes of the A–B and AB–C systems are the same. A fix was implemented in the code, and a new combined fit was performed. The software fix resulted in fitted dynamical parallaxes for both orbits within 1.3σ of the parallax in the HIPPARCOS new reduction (van Leeuwen 2007). A new version of Table 3 incorporating the results of this fit appears here.
Table 3. Orbital Solution and Component Parameters
| Orbital | A–B | A–B | AB–C | AB–C |
|---|---|---|---|---|
| Element | Söderhjelm (1980) | This Work | Pan et al. (1993) | This Work |
| a (mas) | 2.2 ± 0.1 | 2.2 ± 0.1 | 94.61 ± 0.22 | 94.7 ± 0.3 |
| i (deg) | 81.4 ± 0.2a | 98.6c | 83.98 ± 0.09 | 83.76 ± 0.09 |
| Ω (deg) | 132 ± 4 | 47.8 ± 14.5 | 312.26 ± 0.13 | 132.4 ± 0.1 |
| e | 0 | 0 | 0.225 ± 0.005 | 0.211 ± 0.003 |
| ω (deg) | ⋯ | ⋯ | 310.29 ± 0.08 | 313.2 ± 1.0 |
| T0 (JY) | ⋯ | 1973.2471b | 1987.3689 | 1987.3826 ± 0.0052 |
| T0 (JD) | ⋯ | 2441773.49b | 2446931.4 ± 1.5 | 2446936.4 ± 1.9 |
| P (days) | 2.8673 | 2.867328 | 680.05 ± 0.06 | 680.10 ± 0.12 |
| P (years) | ⋯ | ⋯ | 1.8619 ± 0.0002 | 1.8620 ± 0.0003 |
 (mas) |
34.7 ± 0.5 | 34.7 ± 0.5 | ||
| Magnitude Differences | ||||
| Components | Δm(550 nm) | Δm(800 nm) | ||
| A–B | 2.70 ± 0.3 | 2.20 ± 0.3 | ||
| A–C | 2.8 ± 0.2 | 2.6 ± 0.2 | ||
| AB–C | 2.9 ± 0.1 | 2.7 ± 0.1 | ||
| Masses (M⊙) | ||||
| M(A) | 3.5 ± 0.2 | |||
| M(B) | 0.8 ± 0.1 | |||
| M(C) | 1.6 ± 0.1 | |||
Notes.
aRichards et al. (1988). bMinimum light of primary eclipse. ci > 90° used to indicate retrograde motion as defined by Heintz (1978).Download table as: ASCIITypeset image