Table 1
Red CMZ objects observed with Gemini/GNIRS.
| Object ID (SSTGC) | RA (J2000) (h:m:s) | Dec (J2000) (d:m:s) | Obs. date (UTC) | Wavelength range a | Mid-IR classification b |
|---|---|---|---|---|---|
| 372630 | 17:44:42.76 | −29:23:16.19 | 19 July 2022 | L | Possible YSO |
| 425399 | 17:45:02.90 | −29:22:11.36 | 19 June 2017 | K | AGB star (background?)c |
| 21 June 2017 | L | ||||
| 524665 | 17:45:39.86 | −29:23:23.39 | 22 July 2022 | L | YSO |
| 563780 | 17:45:54.15 | −28:58:12.39 | 6 August 2022 | L | Possible YSO |
| 9 August 2022 | L | ||||
| 619522 | 17:46:14.33 | −28:43:18.41 | 21 July 2022 | L | Possible YSO |
| 619964 | 17:46:14.48 | −28:36:39.54 | 19 June 2017 | K | OH/IR star (background?)c |
| 21 June 2017 | L | ||||
| 653270 | 17:46:26.55 | −28:18:59.77 | 20 June 2017 | Ld | Possible YSO |
| 679036 | 17:46:35.98 | −28:43:58.19 | 19 August 2022 | L | Possible YSO |
| 696367 | 17:46:42.29 | −28:33:26.13 | 20 June 2017 | Ld | OH/IR star (background?)c |
| 718757 | 17:46:50.50 | −28:43:33.38 | 19 August 2022 | L | Possible YSO |
| 719445 | 17:46:50.72 | −28:31:24.67 | 2 August 2022 | L | YSO |
| 728480 | 17:46:54.13 | −28:29:39.51 | 27 July 2022 | L | YSO |
| 770393 | 17:47:11.75 | −28:31:21.90 | 21 July 2022 | L | YSO |
| 772981 | 17:47:12.90 | −28:32:05.50 | 5 August 2022 | L | YSO |
| 799887 | 17:47:24.80 | −28:15:56.80 | 19 June 2017 | K | Possible YSO |
| 20 June 2017 | L |
Notes. (a)Wavelength coverage: K (2.0-2.5 μm), L (2.9-3.9 μm). (b)Mid-IR spectroscopic classifications in An et al. (2011). (c)The object is classified as a star in the literature, but this does not exclude the possibility that it is a background (super-)giant seen through a YSO envelope or a dense cloud core. (d)Supplemented with K-band spectra obtained using NASA IRTF/SpeX.
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