Fakultät für Physik und Astronomie
STEPHEN PHILLIPS hostreviews.co.uk / UNSPLASH

Is the nearest black hole hiding in the Albireo stellar system?

Ulrich Bastian , ARI

Albireo (beta Cygni) is a well-known multiple-star system visible with the naked eye from the Northern hemisphere. Proper-motion measurements from Gaia DR2 and DR3, combined with archival Hipparcos data, as well as with spectroscopic radial-velocity measurements and speckle interferometry, indicate a severe discrepancy between the light and mass of component star Ac. This discrepancy has now been confirmed independently via a direct measurement of the gravitational acceleration experienced by the brightest component star, Albireo Aa. The "missing" mass is of the order of 3 Msun. Follow-up campaigns are thus ramping up.

ARI Institute Colloquium
20 Apr 2023, 11:15
Moenchhofstrasse 12-14, Seminarraum 1.OG

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