Definitions and sizes of useful subsamples of the HQ sample.
|Name||Requirements||Number of stars|
|HQ sample||see Table 1||21 288|
|HQ sample with reliable α-element abundances||4000 K <Teff < 5000 K||18 855|
|HQ sample with valid distance determination||distance code (Santiago et al. 2014) converges||21 105|
|HQ sample with (valid) UCAC-4 proper motions||PM criteria (see Sect. 3.2) are fulfilled||17 882|
|HQk sample||valid proper motions & distances||17 758|
|Local HQ sample||d < 1 kpc||1975|
|Local HQk sample||d < 1 kpc ∧ HQk||1654|
|Gold sample||σ(μ) < 4.0 mas/yr ∧ σ(d) /d) < 20%||3984|
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