Ponente
Descripción
The Arcturus stream is an overdensity of stars surrounding the star Arcturus, whose origin remains uncertain. One hypothesis suggests that it could have an extragalactic origin, which would offer a unique opportunity to detect exoplanets originating from outside our Galaxy. After conducting a search for stars and downloading their TESS photometry, we detected that one of the stars (TIC 33477093) shows transit-like signals. Following a thorough analysis, including the use of HARPS spectra, we discovered that it is not an exoplanet in orbit, but rather a close binary system causing anomalous rotation in the primary star. Therefore, we carried out a complete characterization of the system with the aim of establishing it as a reference within the Arcturus Stream, as no other confirmed binary systems are currently known within it.
