Flickering in AGB stars: probing the nature of accreting companions

Snaid, S.; Zijlstra, A. A.; McDonald, I.; Barker, Helen; Marsh, T. R.; Dhillon, V. S.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 3, p.4200-4212

Fecha de publicación:
Binary companions to asymptotic giant branch (AGB) stars are an important aspect of their evolution. Few AGB companions have been detected, and in most cases it is difficult to distinguish between main-sequence and white dwarf companions. Detection of photometric flickering, a tracer of compact accretion discs around white dwarfs, can help identify the nature of these companions. In this work, we searched for flickering in four AGB stars suggested to have likely accreting companions. We found no signs for flickering in two targets: R Aqr and V1016 Cyg. Flickering was detected in the other two stars: Mira and Y Gem. We investigated the true nature of Mira's companion using three different approaches. Our results for Mira strongly suggest that its companion is a white dwarf.
Proyectos relacionados
Agujero negro en erupción
Naturaleza y Evolución de Binarias de Rayos X

Los agujeros negros y estrellas de neutrones en binarias de rayos-X son laboratorios únicos para explorar la física de estos objetos compactos. No solo permiten confirmar la existencia de agujeros negros de origen estelar a través de mediciones dinámicas de sus masas, sino que también permiten investigar el comportamiento de la materia y la

Muñoz Darias