Search Publications
The GALAH+ survey: Third data release
Lewis, Geraint F.; Ting, Yuan-Sen; Casey, Andrew R. +44 more
The ensemble of chemical element abundance measurements for stars, along with precision distances and orbit properties, provides high-dimensional data to study the evolution of the Milky Way. With this third data release of the Galactic Archaeology with HERMES (GALAH) survey, we publish 678 423 spectra for 588 571 mostly nearby stars (81.2 per cen…
Gaia EDR3 view on galactic globular clusters
Vasiliev, Eugene; Baumgardt, Holger
We use the data from Gaia Early Data Release 3 (EDR3) to study the kinematic properties of Milky Way globular clusters. We measure the mean parallaxes and proper motions (PM) for 170 clusters, determine the PM dispersion profiles for more than 100 clusters, uncover rotation signatures in more than 20 objects, and find evidence for radial or tangen…
A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties
Rix, Hans-Walter; El-Badry, Kareem; Heintz, Tyler M.
We construct from Gaia eDR3 an extensive catalogue of spatially resolved binary stars within ≈1 kpc of the Sun, with projected separations ranging from a few au to 1 pc. We estimate the probability that each pair is a chance alignment empirically, using the Gaia catalogue itself to calculate the rate of chance alignments as a function of observabl…
Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST, and literature data
Baumgardt, H.; Vasiliev, E.
We have derived accurate distances to Galactic globular clusters by combining data from the Gaia Early Data Release 3 (EDR3) with distances based on Hubble Space Telescope (HST) data and literature-based distances. We determine distances either directly from the Gaia EDR3 parallaxes, or kinematically by combining line-of-sight velocity dispersion …
A catalogue of white dwarfs in Gaia EDR3
Gänsicke, B. T.; Jordan, S.; Tremblay, P. -E. +7 more
We present a catalogue of white dwarf candidates selected from Gaia Early Data Release 3 (EDR3). We applied several selection criteria in absolute magnitude, colour, and Gaia quality flags to remove objects with unreliable measurements while preserving most stars compatible with the white dwarf locus in the Hertzsprung-Russell diagram. We then use…
Tango for three: Sagittarius, LMC, and the Milky Way
Erkal, Denis; Vasiliev, Eugene; Belokurov, Vasily
We assemble a catalogue of candidate Sagittarius stream members with 5D and 6D phase-space information, using astrometric data from Gaia DR2, distances estimated from RR Lyrae stars, and line-of-sight velocities from various spectroscopic surveys. We find a clear misalignment between the stream track and the direction of the reflex-corrected prope…
Updated parameters of 1743 open clusters based on Gaia DR2
Moitinho, A.; Paunzen, E.; Carraro, G. +5 more
In this study, we follow up our recent paper (Monteiro et al. 2020) and present a homogeneous sample of fundamental parameters of open clusters in our Galaxy, entirely based on Gaia DR2 data. We used published membership probability of the stars derived from Gaia DR2 data and applied our isochrone fitting code, updated as in Monteiro et al. (2020)…
Evidence from APOGEE for the presence of a major building block of the halo buried in the inner Galaxy
Cunha, Katia; Smith, Verne V.; Majewski, Steven R. +13 more
We report evidence from APOGEE for the presence of a new metal-poor stellar structure located within ∼4 kpc of the Galactic Centre. Characterized by a chemical composition resembling those of low-mass satellites of the Milky Way, this new inner Galaxy structure (IGS) seems to be chemically and dynamically detached from more metal-rich populations …
Dark energy survey year 3 results: weak lensing shape catalogue
Bacon, D.; Smith, M.; Davis, T. M. +101 more
We present and characterize the galaxy shape catalogue from the first 3 yr of Dark Energy Survey (DES) observations, over an effective area of 4143 deg2 of the southern sky. We describe our data analysis process and our self-calibrating shear measurement pipeline METACALIBRATION, which builds and improves upon the pipeline used in the D…
Repeating behaviour of FRB 121102: periodicity, waiting times, and energy distribution
Kramer, M.; Seymour, A.; Scholz, P. +7 more
Detections from the repeating fast radio burst FRB 121102 are clustered in time, noticeable even in the earliest repeat bursts. Recently, it was argued that the source activity is periodic, suggesting that the clustering reflected a not-yet-identified periodicity. We performed an extensive multiwavelength campaign with the Effelsberg telescope, th…