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Cepheids as distance indicators and stellar tracers

Bono, G.; Pietrinferni, A.; Braga, V. F.

We review the phenomenology of classical Cepheids (CCs), Anomalous Cepheids (ACs) and type II Cepheids (TIICs) in the Milky Way (MW) and in the Magellanic Clouds (MCs). We also examine the Hertzsprung progression in different stellar systems by using the shape of I-band light curves (Fourier parameters) and observables based on the difference in m…

Stellar occultations by trans-Neptunian objects

Sicardy, Bruno; Buie, Marc W.; Braga-Ribas, Felipe +2 more

Stellar occultations provide a powerful tool to explore objects of the outer solar system. The Gaia mission now provides milli-arcsec accuracy on the predictions of these events and makes possible observations that were previously unthinkable. Occultations return kilometric accuracies on the three-dimensional shape of bodies irrespective of their …