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EL CVn-type binaries - discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems

EL CVn-type binaries - discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems

The star 1SWASP J024743.37−251549.2 was recently discovered to be a binary star in which an A-type dwarf star eclipses the remnant of a disrupted red giant star (WASP 0247−25 B). The remnant is in a rarely observed state evolving to higher effective temperatures at nearly constant luminosity prior to becoming …