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.
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.
An inner companion has recently been discovered orbiting the prototype of classical Cepheids, δ Cep, whose orbital parameters are now reported.
Among 45 Milky Way Cepheids, investigated in this study, 13 show near-infrared excess, which is interpreted as the presence of circumstellar envelopes.
We used a new method of distance determination, based on carbon AGB stars, to derive distances to nine galaxies in the Local and Sculptor Group.
A bold hypothesis that outliers above the period-luminosity relation of Classical Cepheids are binaries brings a discovery of 16 new binary Cepheids with giant companions in the LMC.
We present reddening maps of the Large and Small Magellanic Clouds, based on color measurements of the red clump stars.
Surprising discovery of non-pulsating stars residing inside the instability of LMC Cepheids is further examined with the help of Strömgren photometry.
An international team of astronomers within the Araucaria Project measured the distance to the Large Magellanic Cloud (LMC) with an exceptional accuracy of 1%.