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Table 2.

Classical Cepheids in the inner disk: variation in the parameters.

Name Photometry
Spectroscopy
Instability strip
Teff AV L Teff AV L Teff AV L
(K) (mag) (L) (K) (mag) (L) (K) (mag) (L)
ID 1 4125 ± 409 8.6 1442 ± 261 6375 11.8 6604 ± 297 5125 10.6 3283 ± 152
ID 2 7500 ± 743 15.4 10251 ± 1736 6250 14.7 5393 ± 364 5375 13.4 2614 ± 176
ID 3 5000 ± 533 16.1 4081 ± 1708 6250 17.1 8405 ± 269 5250 16.1 4570 ± 146
ID 4 3900 ± 442 7.4 923 ± 256 6250 10.8 4773 ± 236 5625 10.3 3338 ± 165
ID 5 4750 ± 604 11.8 693 ± 302 6000 13.9 1777 ± 146 5625 13.4 1367 ± 112

Notes. Columns 2–4 give the results for the standard fitting of the SED. The interstellar reddening is fixed and the effective temperature and luminosity are fitted. The results are copied from Table 1. Columns 5–7 give the results when the effective temperature is fixed to the spectroscopic value. Quoted is the effective temperature of the model atmosphere closest to it. Inno et al. (2019) quote an error of ±300 K on the spectroscopic effective temperature determination. The luminosity and interstellar reddening are fitted. The error on AV is estimated to be about 1 mag. The error on the luminosity is the formal error scaled to give a reduced χ2 of unity. Columns 8–10 give the results when the effective temperature is fixed to a value that “by eye” would put the star roughly in the middle of the instability strip (cf. Fig. 2). The luminosity and interstellar reddening are fitted. The error on AV is estimated to be about 1 mag. The error on the luminosity is the formal error scaled to give a reduced χ2 of unity.

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