All articles tagged with #cataclysmic variable
A multi-telescope study finds ASKAP J1745 is an accreting white-dwarf binary, implying long-period radio transients arise from magnetic interactions during accretion and associated X-ray activity; this links some LPTs to white dwarf binaries, though more sources remain to be studied.
Astronomers have discovered a new magnetic cataclysmic variable system, likely of the polar type, designated as XMM J152737.4-205305.9 (or XMM 152737). By analyzing data from ESA's XMM-Newton and Gaia satellites, the system was found to exhibit characteristics consistent with polars, including a strong magnetic field, synchronous rotation, and prominent emission lines of hydrogen and helium. Further observations are needed to determine the origin of observed dips and confirm its polar classification.
Astronomers using NASA's TESS have discovered a new cataclysmic variable system called TIC 378898110, which is an AM Canum Venaticorum (AM CVn) binary star. AM CVn systems are rare and consist of a white dwarf accreting helium-dominated matter from a degenerate or semi-degenerate donor star. TIC 378898110 is the third-brightest known AM CVn and has an orbital period of 22-23 minutes. The system recently underwent a brightening event, and its dominant photometric period decreased during this time.