Table 1.
Spectroscopic samples used in this analysis.
| Dataset | (l, b) | N | R | Δλ (μm) | Type |
|---|---|---|---|---|---|
| R17 | (0, 0) | 17 | 24 000 | 2.11–2.40 | M giants |
| N18 | (0, 0) | 9 | 50 000 | 2.08–2.14 | M giants |
| – | (0, ±1) | 23 | – | – | – |
| – | (0, ±2) | 24 | – | – | – |
| – | (0, 3) | 15 | – | – | – |
| Za19 | (±0.2, ±1) | 13 | 22 500 | 1.50–1.70 | M giants |
| – | (±0.2, ±2) | 58 | – | – | – |
| – | (±0.2, ±3) | 35 | – | – | – |
| Zo17 | (0, –1) | 432 | 6500 | 0.82–0.94 | RC stars |
| – | (0, –2) | 432 | – | – | – |
| FK17 | (0, 0) | 706 | 4000 | 1.93–2.46 | M giants |
Notes. The first column gives the reference, the second column the central coordinates in galactic longitudes and latitudes, the third column the number of used stars, the fourth column the spectral resolution, the fifth column the corresponding wavelength range in μm, and the last column the tracer of the stellar population used.
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