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Table 2.
Census updated of ∼412 unique field carbon-depleted N-rich ([C/Fe] < +0.15; [N/Fe] ≳ +0.5) stars in the APOGEE survey.
| Number of | Galactic component | Data release (DR) | Code | Literature |
|---|---|---|---|---|
| N-rich stars | ||||
| 5 | Halo: Migrants | DR 12 | ASPCAP | Martell et al. (2016) |
| 1 | Halo | DR 12 | iSpec(1) and MOOG(2) | Fernández-Trincado et al. (2016a) |
| 58 | Bulge | DR 12 | ASPCAP | Schiavon et al. (2017) |
| 11 | Bulge, Disk and Halo | DR 13 | Turbospectrum(3) | Fernández-Trincado et al. (2017) |
| 31 | Bulge, Disk, Halo, and | DR 14 | Payne | Fernández-Trincado et al. (2019b) |
| Palomar 5: extra-tidal candidate | ||||
| 1 | Halo: Binary system | DR 14 | BACCHUS | Fernández-Trincado et al. (2019c) |
| 7 | Bulge, Disk and Halo: N-/Si-rich | DR 16 | BACCHUS | Fernández-Trincado et al. (2020a) |
| (with simultaneously C,N,O determinations) | ||||
| 44 | Magellanic Clouds: LMC & SMC | DR 16 | BACCHUS | Fernández-Trincado et al. (2020b) |
| 16 | Bulge and inner Halo: N-/Al-rich | DR 16 | BACCHUS | Fernández-Trincado et al. (2020c) |
| 47 out of 83 | Located in the inner 4 kpc of the MW; | DR 16 | ASPCAP | Kisku et al. (2021) |
| excluding previously identified N-rich stars, and | ||||
| stars positioned inside the tidal radius of known GCs | ||||
| 2 | Sgr+M 54 field | DR 16 | BACCHUS | Fernández-Trincado et al. (2021c) |
| 40 out of 42 | Bulge, Disk and Halo ([Fe/H] > −0.7) | DR 17 | ASPCAP | Fernández-Trincado et al. (2021d) |
| excluding two previously identified N-rich stars | ||||
| 149 | LMC, SMC, Bulge, Disk and Halo ([Fe/H] < −0.7) | DR 17 | ASPCAP | This work |
References.(1) Blanco-Cuaresma et al. (2014); (2) Sneden (1973); and (3) Alvarez & Plez (1998).
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