8.6k citations · 17.2k across the 40 of their papers we have counts for
12 papers · 1 filter
Yet another star in the Albireo system -- The discovery of Albireo Ad
D. Jack, K. -P. Schröder, M. Mittag +1
Context. Albireo is a well-known bright visual double star. It is still unclear if the components A and B form a gravitationally bound system. The component Albireo A is itself a b…
Prediction of Astrometric-Microlensing Events from Gaia eDR3 Proper Motions
Jonas Klüter, Ulrich Bastian, Markus Demleitner +1
Astrometric microlensing is a unique tool to measure stellar masses. It allows us to determine the mass of the lensing star with an accuracy of a few per cent. In this paper, we up…
A celestial matryoshka: Dynamical and spectroscopic analysis of the Albireo system
Ronald Drimmel, Alessandro Sozzetti, Klaus-Peter Schroeder +4
We present a spectroscopic characterisation and a new orbital solution for the binary system beta Cyg Aa/Ac (MCA 55), the primary component (beta Cyg A) of the well-known wide doub…
Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
Gaia Collaboration, R. L. Smart, L. M. Sarro +420
We produce a clean and well-characterised catalogue of objects within 100\,pc of the Sun from the \G\ Early Data Release 3. We characterise the catalogue through comparisons to the…
Gaia 8: Discovery of a star cluster containing beta Lyrae -- and of a larger old (extinct) star formation complex surrounding it
U. Bastian
Aims: To try and clarify whether there are stars in the neighbourhood of Lyrae which are physically connected to the famous prototype eclipsing binary. Methods: Scrutinize the…
The mass of Albireo Aa and the nature of Albireo AB: New aspects from Gaia DR2
U. Bastian, R. Anton
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: W…
Prediction of astrometric microlensing events from Gaia DR2 proper motions
J. Klüter, U. Bastian, M. Demleitner +1
Context: Astrometric gravitational microlensing is an excellent tool to determine the mass of stellar objects. Using precise astrometric measurements of the lensed position of a ba…
Ongoing Astrometric Microlensing Events of Two Nearby Stars
J. Klüter, U. Bastian, M. Demleitner +1
Context. Astrometric microlensing is an excellent tool to determine the mass of a stellar object. By measuring the astrometric shift of a background source star in combination with…
Gaia Data Release 2: Variable stars in the colour-absolute magnitude diagram
Gaia Collaboration, L. Eyer, L. Rimoldini +14
The ESA Gaia mission provides a unique time-domain survey for more than 1.6 billion sources with G ~ 21 mag. We showcase stellar variability across the Galactic colour-absolute mag…
Gaia Data Release 2: Observational Hertzsprung-Russell diagrams
Gaia Collaboration, C. Babusiaux, F. van Leeuwen +450
We highlight the power of the Gaia DR2 in studying many fine structures of the Hertzsprung-Russell diagram (HRD). Gaia allows us to present many different HRDs, depending in partic…
Gaia Data Release 1. Testing the parallaxes with local Cepheids and RR Lyrae stars
Gaia Collaboration, G. Clementini, L. Eyer +588
Parallaxes for 331 classical Cepheids, 31 Type II Cepheids and 364 RR Lyrae stars in common between Gaia and the Hipparcos and Tycho-2 catalogues are published in Gaia Data Release…
Constraints on the origin of the massive, hot, and rapidly rotating magnetic white dwarf RE J 0317-853 from an HST parallax measurement
Baybars Külebi, Stefan Jordan, Edmund Nelan +2
We use the parallax measurements of RE J 0317-853 to determine its mass, radius, and cooling age and thereby constrain its evolutionary origins. We observed RE J 0317-853 with the…