Type II Cepheids might be an attractive alternative to classical Cepheids regarding the projection factor (p-factor), which is a crucial parameter in the Baade-Wesselink technique to determine the distance.
This year the extended Araucaria group met at the Observatoire de Paris, France, where the members presented their recent projects and discussed the future of the extragalactic distance scale.
Newly discovered nine binary systems consisting of two Cepheids shed more light on the evolution of multiple systems, and reveal their merger origin.
An early-type eclipsing binary turns out to be a hierarchical quadruple system. Analysis of its complex configuration, although not easy, yields masses, radii, and temperatures of the inner binary, and mass estimations of the two outermost components.
It was… Falcon 9 😉
April has been an eventful month for the Araucaria Project, because we took part in a series of events leading to the local, Chilean inauguration of the Rolf Chini Cerro Murphy Observatory (OCM).
Members of the Araucaria Project were invited to the cocktail party joined with the presentation of the Rolf Chini Cerro Murphy Observatory at the Embassy of the Republic of Poland in Santiago de Chile.
An inner companion has recently been discovered orbiting the prototype of classical Cepheids, δ Cep, whose orbital parameters are now reported.
Araucaria’s flag project – Rofl Chini Cerro Murphy Observatory – was presented at FIDAE (Feria Internacional del Aire y del Espacio) on April 11–14, 2024.
Today we celebrated the inauguration of Rolf Chini Cerro Murphy Observatory, OCM in short.