SIMBAD references

2018A&A...620L...2B - Astronomy and Astrophysics, volume 620, L2-2 (2018/12-1)

The mass of Albireo Aa and the nature of Albireo AB. New aspects from Gaia DR2.


Abstract (from CDS):

Aims. We aim to clarify the nature of Albireo AB and specifically to decipher whether it is an optical or physical pair. We also try to determine the mass of Albireo Aa.
Methods. We scrutinize and compare the available absolute astrometric data (from HIPPARCOS and Gaia DR2) of Albireo A and B, and we investigate the relative orbit of the pair Albireo Aa,Ac using orbit solutions based on ground-based interferometric measurements.
Results. The mass of Albireo Aa (K3 II) is surprisingly small; only an upper limit of about 0.7M could be derived. The systemic proper motion of Aa,Ac differs from that of component B by about 10mas/year with an uncertainty of less than 2mas/year. Albireo AB is therefore most probably an optical double.
Conclusions. Specific astrometric and spectroscopic follow-up observations clarifying the surprising mass estimate for Albireo Aa are recommended.

Abstract Copyright: © ESO 2018

Journal keyword(s): stars: fundamental parameters - binaries: general - stars: individual: Albireo - stars: individual: beta Cyg - proper motions - parallaxes

Simbad objects: 4

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2018A&A...620L...2B and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact