Roche-lobe filling factor of mass-transferring red giants: the PIONIER view
Roche-lobe filling factor of mass-transferring red giants: the PIONIER view
Using the PIONIER visitor instrument that combines the light of the four Auxiliary Telescopes of ESO's Very Large Telescope Interferometer, we precisely measure the diameters of several symbiotic and related stars: HD 352, HD 190658, V1261 Ori, ER Del, FG Ser, and AG Peg. These diameters – in the range …