MEREGHETTI, SandroSandroMEREGHETTILA PALOMBARA, NICOLANICOLALA PALOMBARA2020-05-122020-05-1220160273-1177http://hdl.handle.net/20.500.12386/24744Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs. The small but growing sample of hot subdwarfs detected in X-rays includes binary systems, in which the X-rays result from wind accretion onto a compact companion (white dwarf or neutron star), as well as isolated sdO stars in which X-rays are probably due to shock instabilities in the wind. X-ray observations of these low mass stars provide information which can be useful also for our understanding of the winds of more luminous and massive early-type stars and can lead to the discovery of particularly interesting binary systems.STAMPAenArticle10.1016/j.asr.2015.11.0222-s2.0-84950132139000381535100010https://www.sciencedirect.com/science/article/pii/S0273117715008194?via%3Dihubhttp://arxiv.org/abs/1510.04173v12016AdSpR..58..809MFIS/05 - ASTRONOMIA E ASTROFISICA