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| Paper: |
Type II Cepheids as Stellar Tracers and Distance Indicators |
| Volume: |
529, RR Lyrae/Cepheid 2019: Frontiers of Classical Pulsators |
| Page: |
259 |
| Authors: |
Bhardwaj, A.; Braga, V. F.; Minniti, D.; Ramos, R. C.; Rejkuba, M. |
| Abstract: |
Type II Cepheids are both useful distance indicators and tracers of old age stellar populations in their host galaxy. We summarize near-infrared observations of
type II Cepheids in the Large Magellanic Cloud and discuss the absolute calibration of their Period-Luminosity relations. Combining with the near-infrared data for type
II Cepheids in the Galactic bulge from the VISTA VVV survey, we estimated a robust distance to the Galactic center. We found that type II Cepheids trace the spherically symmetric
spatial distribution with a possible evidence of ellipsoidal structure, similar to RR Lyrae stars. Together with Gaia and
VVV proper motions, type II Cepheids were found to trace the old, metal-poor, kinematically hot stellar populations in the Galactic bulge. |
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