High-resolution, near-infrared observations of B[e] supergiants

B[e] supergiants stars are surrounded by disks formed from material released from the central object. To trace the properties of these disks, diverse emission features in the optical and near-infrared can be used. CO band emission is particularly valuable, because it defines the transition region between the atomic and molecular gas. We have recently started a campaign to obtain high-resolution near-infrared spectra for B[e] supergiant stars with confirmed CO emission. In this work, we present GEMINI/IGRINS spectra of CD-57 3107 and HD 62 623 and the physical parameters of their molecular disks obtained from detailed modeling of their CO band emission. Moreover, we report on the detection of ¹³CO emission in both stars, reinforcing the evolved nature of these objects.