Table 11.
Physical properties of the two components in NY Hya as derived from TESS photometry and FEROS spectral data.
| Parameter | Star A | Star B |
|---|---|---|
| Mass (M⊙) | 1.1605 ± 0.0090 | 1.1678 ± 0.0096 |
| Semi-major axis (R⊙) | 15.814 ± 0.040 | |
| Radius (R⊙) | 1.407 ± 0.015 | 1.406 ± 0.017 |
| log g (cm s−2) | 4.2059 ± 0.0089 | 4.210 ± 0.011 |
| vsynch (km s−1) | 14.91 ± 0.16 | 14.90 ± 0.18 |
| Teff(K) | 5595 ± 61 | 5607 ± 61 |
| log(LBol/L⊙) | 0.243 ± 0.021 | 0.246 ± 0.022 |
| V (mag) | 9.247 ± 0.043 | 9.244 ± 0.043 |
| (b − y)0 (mag) | 0.425 ± 0.026 | 0.420 ± 0.025 |
| m1, 0 (mag) | 0.249 ± 0.047 | 0.256 ± 0.047 |
| c1, 0 (mag) | 0.346 ± 0.054 | 0.346 ± 0.054 |
| MBol(a) (mag) | 4.133 ± 0.053 | 4.126 ± 0.054 |
| MV(b) (mag) | 4.241 ± 0.063 | 4.231 ± 0.064 |
| MV(b) (mag) | 3.483 ± 0.045 | |
| MV(c) (mag) | 3.365 ± 0.022 | |
| KS dist. (pc) | 104.1 ± 1.5 | |
| Gaia DR2 dist. (pc) | 106.10 ± 0.70 | |
Notes. The systemic absolute V-band magnitude agrees with the fully empirical measurement obtained from the Gaia parallax to within 1.9σ. All magnitudes are extinction–reddening corrected.
Derived using bolometric corrections from Girardi et al. (2002) and adopting a weighted mean of [Fe/H] = 0.003 ± 0.046 dex.
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