Matti Dorsch – Research fellow Universität Potsdam “A search for post-RLOF contamination: BD−7 5977” Hot subdwarf stars are core helium burning stars with very thin or nohydrogen envelopes; almost all of them seem to be formed by binaryinteraction, in particular by Roche lobe overflow. Indeed, many of themare found in binary systems with cool companions, but … Leer más