Table 1
EP Aqr observed and adopted properties.
| Observed properties | |
|---|---|
| RA(a) | 21h46m31.847s |
| Dec(a) | −02°12′45′′⋅902 |
| l | 54° 2 |
| b | − 39° 3 |
| Spectral type(b) | M7-III |
| Distance(c,1) | 113.6 ± 8.2 pc |
| Luminosity(d) | 4828 L⊙ |
| Radius(a) | 87.5 R⊙ |
| Effective temperature(e) | 3236 K |
| Mass(e) | 1.7 M⊙ |
| EB−V (ISM)(f) | 0.058 mag |
| Adopted properties for MARCS | |
| Effective temperature | 3200 K |
| Mass | 1 M⊙ |
| Metallicity ([Fe/H]) | 0.0 dex |
| Surface gravity, logg | 0.5 dex |
Notes. (1) We note that there are more recent parallaxes from Gaia DR2, however, at the start of this project we noted large error bars for data on bright stars (e.g. Lindegren et al. 2018; Drimmel et al. 2019) and opted to use the older HIPPARCOS parallax for this study.
References. (a) Gaia Collaboration (2018), (b) Keenan & McNeil (1989), (c) van Leeuwen (2007), (d) Winters et al. (2003), (e) Dumm & Schild (1998), (f) Gontcharov (2012).
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