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…
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…
The e-MERGE Survey (e-MERLIN Galaxy Evolution Survey): overview and survey description
Guidetti, D.; Bondi, M.; Prandoni, I. +37 more
We present an overview and description of the e-MERGE Survey (e-MERLIN Galaxy Evolution Survey) Data Release 1 (DR1), a large program of high-resolution 1.5-GHz radio observations of the GOODS-N field comprising ∼140 h of observations with enhanced-Multi-Element Remotely Linked Interferometer Network (e-MERLIN) and ∼40 h with the Very Large Array …
Short- and long-term near-infrared spectroscopic variability of eruptive protostars from VVV
Minniti, D.; Alonso-García, J.; Lucas, P. W. +7 more
Numerous eruptive variable young stellar objects (YSOs), mostly Class I systems, were recently detected by the near-infrared Vista Variables in the Via Lactea (VVV) survey. We present an exploratory near-infrared spectroscopic variability study of 14 eruptive YSOs. The variations were sampled over one-day and one-to-two-year intervals and analysed…
A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data
Papadakis, I. E.; Dovčiak, M.; Karas, V. +3 more
We present the results from an X-ray variability study of IRAS 13224-3809. This is probably the best source for X-ray reverberation studies since it is X-ray bright, extremely variable, and it has been extensively observed with XMM-Newton. We used all the archival XMM-Newton data from the three EPIC cameras (to increase the signal to noise) and, g…
Properties of five z ∼ 0.3-0.4 confirmed LyC leakers: VLT/XShooter observations
Schaerer, D.; Ramambason, L.; Izotov, Y. I. +7 more
Using new Very Large Telescope (VLT)/XShooter spectral observations we analyse the physical properties of five z ~ 0.3-0.4 confirmed Lyman continuum (LyC) leakers. Strong resonant Mg II λλ2796, 2803 Å emission lines (I(λλ2796, 2803)/I(Hβ) ≃ 10-38 per cent) and non-resonant Fe II* λλ2612, 2626 Å emission lines are observed in spectra of five and th…
Carbon stars as standard candles: I. The luminosity function of carbon stars in the Magellanic Clouds
Heyl, Jeremy; Richer, Harvey; Ripoche, Paul +1 more
Our goal in this paper is to derive a carbon-star luminosity function that will eventually be used to determine distances to galaxies at 50-60 Mpc and hence yield a value of the Hubble constant. Cool N-type carbon stars exhibit redder near-infrared colours than oxygen-rich stars. Using Two Micron All Sky Survey near-infrared photometry and the Gai…
Discovering the most elusive radio relic in the sky: diffuse shock acceleration caught in the act?
Gastaldello, Fabio; Brunetti, Gianfranco; Dallacasa, Daniele +9 more
The origin of radio relics is usually explained via diffusive shock acceleration (DSA) or re-acceleration of electrons at/from merger shocks in galaxy clusters. The case of acceleration is challenged by the low predicted efficiency of low Mach number merger shocks, unable to explain the power observed in most radio relics. In this letter, we prese…