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Table 4

Estimated masses for components of tight Hyades binaries.

Object MJ   (M) MH   (M) MK   (M) q

RM 49 A 0.220 0.219 0.222
RM 49 B 0.191 0.192 0.196 0.87–0.88
RM 132 A 0.215 0.210 0.218
RM 132 B 0.210 0.205 0.211 0.97–0.98
RM 346 A 0.232 0.230 0.234
RM 346 B 0.187 0.189 0.192 0.81–0.82
RM 221 A 0.209 0.205 0.210
RM 221 B 0.208 0.204 0.209 0.99
RM 126 A 0.139 0.137 0.141
RM 126 B 0.138 0.136 0.140 0.99
UKIDSS 2 A 0.055
UKIDSS 2 B 0.046 0.84
UKIDSS 5 A 0.055 0.059 0.062
UKIDSS 5 B 0.030 0.037 0.043 0.55–0.69
UKIDSS 9 A 0.052 0.053
UKIDSS 9 B 0.033 0.040 0.63–0.75

Notes.Masses are estimated by comparing each object’s brightness in a given filter with the 600 Myr-old BT-Settl isochrone (Allard et al. 2003; Allard 2009) using a distance modulus of 3.33 and assuming no foreground extinction. Boldfaced entries indicate mass ratios derived from the K band photometry of the individual components.

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