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Table 1

Summary table for the selection of the APOGEE HQ Giant Sample.

Parameter Requirement Notes

S / N >70/pixel
σ(vlos) 1 km s-1 no RV-identified binaries
APOGEE_STARFLAG bits ∉ { 0, 1, 3 } no commissioning data or obviously bad spectra
APOGEE_TARGET1 bits ∉ { 10, 15, 16, 18, 19, 23, 24 } avoid, e.g., extended objects, M31 clusters, M dwarfs
APOGEE_TARGET2 bits ∉ { 4, 9, 10, 13, 15, 16, 17 } avoid, e.g., sky fibres, telluric standards, known cluster members
ASPCAP χ2 <25
T eff ∈ {3800 K, 5200 K} avoid too low temperatures
log g ∈ { 0.5 dex, 3.8 dex } select red giant stars
[M/H] ∈ {−1.0, 0.45 } avoid low metallicities

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