Table 1
Spectral types of the massive stars in W49.
| Star | Ph. class. | Sp. class. | Saral et al. (2015) class. |
|
|
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| #1 | <O3 | O2-3.5If* | class III/photosphere |
| #2 | <O3 | O2-3.5If* | class I |
| #3 | <O3 | O3-O7V | class III/photosphere |
| #4 | O† | YSO | class I |
| #5 | O3-O4 | O3-O5V | unclassified |
| #6 | O5.5-O6 | B2-B3V | unclassified |
| #7 | O3-O4 | O3-O5V | unclassified |
| #8 | <O3 | O3-O7V | class I |
| #9 | O4-O5 | O3-O7V | – |
| #10 | – | O5-O7V | – |
| #11 | O5-O5.5 | O3-O5V | – |
| #12 | O5-O5.5 | O5-O7V | – |
| #13 | O8-O8.5 | B0-B2V | – |
| #14 | O5.5-O6 | O3-O5V | class I |
| #15 | <O3 | O2-3.5If* | class II |
| #16 | O6-O6.5 | Brγ abs | – |
| #17 | O7.5-O8 | O7-O9.5 | – |
| #18 | O5.5-O6 | O8-O9.5 | – |
| #19 | O4-O5 | Brγ abs | – |
| #20 | O6-O6.5 | Brγ abs | – |
| #21 | O† | YSO | unclassified |
| #22 | O5-O5.5 | Brγ abs | – |
Notes. Photometric classification derived from the CMD and spectroscopic classification from the LUCI K-band spectra compared to the mid-infrared photometric classification of Saral et al. (2015). The numbering of the massive stars is according to their K-band magnitude from bright to faint.
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