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We report the detection of a wide young hierarchical triple system where theprimary has a candidate debris disc. The primary, TYC 5241-986-1 A, is a knownTycho star which we classify as a late-K star with emission in the X-ray, nearand far-UV and H\alpha\ suggestive of youth. Its proper motion, photometricdistance (65-105 pc) and radial velocity lead us to associate the system withthe broadly defined Local Association of young stars but not specifically withany young moving group. The presence of weak lithium absorption and X-ray andcalcium H and K emission support an age in the 20 to ~125 Myr range. Thesecondary is a pair of M4.5+-0.5 dwarfs with near and far UV and H\alpha\emission separated by approximately 1 arcsec (~65-105 AU projected separation)which lie 145 arcsec (9200-15200 AU) from the primary. The primary has a WISE22 micron excess and follow-up Herschel observations also detect an excess at70 micron. The excess emissions are indicative of a 100-175 K debris disc. Wealso explore the possibility that this excess could be due to a coincidentbackground galaxy and conclude that this is unlikely. Debris discs areextremely rare around stars older than 15 Myr, hence if the excess is caused bya disc this is an extremely novel system.

A young hierarchical triple system harbouring a candidate debris disc