Search Publications
The Gaia-ESO Survey: membership probabilities for stars in 32 open clusters from 3D kinematics
Gilmore, G.; Bayo, A.; Cantat-Gaudin, T. +16 more
The Gaia-ESO Survey (GES) observed many open clusters as part of its programme to spectroscopically characterize the various Milky Way populations. GES spectroscopy and Gaia astrometry from its second data release are used here to assign membership probabilities to targets towards 32 open clusters with ages from 1 to 3800 Myr, based on maximum lik…
Probing the extragalactic fast transient sky at minute time-scales with DECam
Lien, A.; Cucchiara, A.; Wolf, C. +22 more
Searches for optical transients are usually performed with a cadence of days to weeks, optimized for supernova discovery. The optical fast transient sky is still largely unexplored, with only a few surveys to date having placed meaningful constraints on the detection of extragalactic transients evolving at sub-hour time-scales. Here, we present th…
Peculiar Solar Sources and Geospace Disturbances on 20-26 August 2018
Chertok, I. M.; Belov, A. V.; Abunina, M. A. +1 more
On the approach to minimum of Solar Cycle 24, on 26 August 2018, an unexpectedly strong geomagnetic storm (GMS) suddenly occurred. Its Dst index reached −174 nT, that is, the third most intense storm of the cycle. The analysis showed that it was initiated by a two-step long filament eruption, which occurred on 20 August in the central s…
Formation channels of slowly rotating early-type galaxies
Krajnović, Davor; Emsellem, Eric; Cappellari, Michele +11 more
We study the evidence for a diversity of formation processes in early-type galaxies by presenting the first complete volume-limited sample of slow rotators with both integral-field kinematics from the ATLAS3D Project and high spatial resolution photometry from the Hubble Space Telescope. Analysing the nuclear surface brightness profiles…
Probing the magnetospheric accretion region of the young pre-transitional disk system DoAr 44 using VLTI/GRAVITY
Dougados, C.; Bouvier, J.; Brandner, W. +6 more
Context. Young stellar objects are thought to accrete material from their circumstellar disks through their strong stellar magnetospheres.
Aims: We aim to directly probe the magnetospheric accretion region on a scale of a few 0.01 au in a young stellar system using long-baseline optical interferometry.
Methods: We observed the pre-transi…
Temperature profiles of young disk-like structures. The case of IRAS 16293A
van Dishoeck, Ewine F.; Jørgensen, Jes K.; van 't Hoff, Merel L. R. +1 more
Context. Temperature is a crucial parameter in circumstellar disk evolution and planet formation because it governs the resistance of the gas to gravitational instability and sets the chemical composition of the planet-forming material.
Aims: We set out to determine the gas temperature of the young disk-like structure around the Class 0 proto…
Aluminium-enriched metal-poor stars buried in the inner Galaxy
Beers, Timothy C.; Minniti, Dante; Geisler, Doug +5 more
Stars with higher levels of aluminium and nitrogen enrichment are often key pieces in the chemical makeup of multiple populations in almost all globular clusters (GCs). There is also compelling observational evidence that some Galactic components could be partially built from dissipated GCs. The identification of such stars among metal-poor field …
The dust mass function from z ∼0 to z ∼2.5
Pozzi, F.; Santini, P.; Gruppioni, C. +3 more
We derive for the first time the dust mass function (DMF) in a wide redshift range, from z ∼ 0.2 up to z ∼ 2.5. In order to trace the dust emission, we start from a far-IR (160-µm) Herschel selected catalogue in the COSMOS field. We estimate the dust masses by fitting the far-IR data (λrest ≳ 50 µm) with a modified black bod…
Fluorine in the solar neighbourhood: modelling the Galactic thick and thin discs
Ryde, N.; Jönsson, H.; Matteucci, F. +3 more
We investigate the evolution of the abundance of fluorine in the Milky Way thick and thin discs by means of detailed chemical evolution models compared with recent observational data. The chemical evolution models adopted here have already been shown to fit the observed abundance patterns of CNO and α-elements as well as the metallicity distributi…
Trans-Neptunian Objects Found in the First Four Years of the Dark Energy Survey
Smith, M.; Abbott, T. M. C.; Brooks, D. +62 more
We present a catalog of 316 trans-Neptunian bodies (TNOs) detected from the first four seasons ("Y4" data) of the Dark Energy Survey (DES). The survey covers a contiguous 5000 deg2 of the southern sky in the grizY optical/NIR filter set, with a typical TNO in this part of the sky being targeted by 25-30 Y4 exposures. This paper focuses …