RX J1553.0+4457 is a detached post-common-envelope binary whose light curve shows ellipsoidal modulation from a tidally distorted M dwarf, with magnetic activity producing flares and declining X-ray emission, consistent with a white dwarf plus M dwarf SED and no clear accretion disk.
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Ellipsoidal modulation and multi-wavelength activity in the pre-cataclysmic binary RX J1553.0+4457
RX J1553.0+4457 is a detached post-common-envelope binary whose light curve shows ellipsoidal modulation from a tidally distorted M dwarf, with magnetic activity producing flares and declining X-ray emission, consistent with a white dwarf plus M dwarf SED and no clear accretion disk.