Search Publications
Evidence for GN-z11 as a luminous galaxy at redshift 10.957
Ho, Luis C.; Fan, Xiaohui; Jiang, Linhua +9 more
GN-z11 was photometrically selected as a luminous star-forming galaxy candidate at redshift z > 10 on the basis of Hubble Space Telescope imaging data1. Follow-up Hubble Space Telescope near-infrared grism observations detected a continuum break that was explained as the Lyα break corresponding to z =11.0 9−0.12+0.08<…
Internal calibration of Gaia BP/RP low-resolution spectra
Jordi, C.; Evans, D. W.; van Leeuwen, F. +6 more
Context. The full third Gaia data release will provide, for the first time, the calibrated spectra obtained with the blue and red Gaia slitless spectrophotometers (BP and RP, respectively). Gaia is a very complex mission and cannot be considered as a single instrument, but rather as many instruments. The two lines of sight with wide fields of view…
Detection of the LMC-induced sloshing of the Galactic halo
Bird, Sarah A.; Zhao, Gang; Erkal, Denis +8 more
A wealth of recent studies have shown that the LMC is likely massive, with a halo mass >1011 M⊙. One consequence of having such a nearby and massive neighbour is that the inner Milky Way is expected to be accelerated with respect to our Galaxy's outskirts (beyond ~30 kpc). In this work, we compile a sample of ~500 stars wi…
A High-resolution View of Fast Radio Burst Host Environments
Kilpatrick, Charles D.; Simha, Sunil; Prochaska, J. Xavier +12 more
We present Hubble Space Telescope ultraviolet and infrared observations of eight fast radio burst (FRB) host galaxies with subarcsecond localizations, including the hosts of three known repeating FRBs. We quantify their spatial distributions and locations with respect to their host galaxy light distributions, finding that they occur at moderate ho…
FINK, a new generation of broker for the LSST community
Karpov, Sergey; Savchenko, Volodymyr; Coleiro, Alexis +33 more
FINK is a broker designed to enable science with large time-domain alert streams such as the one from the upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST). It exhibits traditional astronomy broker features such as automatized ingestion, annotation, selection, and redistribution of promising alerts for transient science. It…
Statistics of 700 Individually Studied W UMa Stars
Lazarević, Sanja; Latković, Olivera; Čeki, Atila
We present a statistical study of the largest bibliographic compilation of stellar and orbital parameters of W UMa stars derived by light-curve synthesis with Roche models. The compilation includes nearly 700 individually investigated objects from over 450 distinct publications. Almost 70% of this sample is comprised of stars observed in the past …
Ultraluminous X-Ray Sources
Fabrika, S. N.; Atapin, K. E.; Vinokurov, A. S. +1 more
Ultraluminous X-ray sources (ULXs) were identified as a separate class of objects in 2000 based on data from the Chandra X-Ray Observatory. These are unique objects: their X-ray luminosities exceed the Eddington limit for a typical stellar-mass black hole. For a long time, the nature of ULXs remained unclear. However, the gradual accumulation of d…
Gaia EDR3 Proper Motions of Milky Way Dwarfs. I. 3D Motions and Orbits
Hammer, Francois; Babusiaux, Carine; Du, Cuihua +5 more
Based on Gaia Early Data Release 3 (EDR3), we estimate the proper motions of 46 dwarf galaxies of the Milky Way (MW). The uncertainties in proper motions, determined by combining both statistical and systematic errors, are smaller by a factor of 2.5 when compared with Gaia Data Release 2. We have derived orbits in four MW potential models that are…
Galactic seismology: the evolving 'phase spiral' after the Sagittarius dwarf impact
Bland-Hawthorn, Joss; Tepper-García, Thor
In 2018, the ESA Gaia satellite discovered a remarkable spiral pattern ('phase spiral') in the z - Vz phase plane throughout the solar neighbourhood, where z and Vz are the displacement and velocity of a star perpendicular to the Galactic disc. In response to Binney & Schönrich's analytic model of a disc-crossing satellit…
The ALPINE-ALMA [CII] survey. Obscured star formation rate density and main sequence of star-forming galaxies at z > 4
Cimatti, A.; Maiolino, R.; Pozzi, F. +30 more
Star formation rate (SFR) measurements at z > 4 have relied mostly on the rest-frame far-ultraviolet (FUV) observations. The corrections for dust attenuation based on the IRX-β relation are highly uncertain and are still debated in the literature. Hence, rest-frame far-infrared (FIR) observations are necessary to constrain the dust-obscured com…