Search Publications
The Grism Lens-Amplified Survey from Space (GLASS) - XIII. G800L optical spectra from the parallel fields
Vulcani, B.; Treu, T.; Brammer, G. B. +5 more
We present a catalogue of 22 755 objects with slitless, optical, Hubble Space Telescope (HST) spectroscopy from the Grism Lens-Amplified Survey from Space (GLASS). The data cover ∼220 sq. arcmin to 7-orbit (∼10 ks) depth in 20 parallel pointings of the Advanced Camera for Survey's G800L grism. The fields are located 6 arcmin away from 10 massive g…
The first observed stellar occultations by the irregular satellite Phoebe (Saturn IX) and improved rotational period
Barry, T.; Snodgrass, C.; Jehin, E. +24 more
We report six stellar occultations by Phoebe (Saturn IX), an irregular satellite of Saturn, obtained between mid-2017 and mid-2019. The 2017 July 6 event was the first stellar occultation by an irregular satellite ever observed. The occultation chords were compared to a 3D shape model of the satellite obtained from Cassini observations. The rotati…
Cluster membership for the long-period Cepheid calibrator SV Vul
Negueruela, I.; Dorda, R.; Marco, A.
Classical Cepheids represent the first step of the distance scale ladder. Claims of tension between the locally calculated Hubble constant and the values deduced from Planck's results have sparked new interest in these distance calibrators. Cluster membership provides an independent distance measurement, as well as astrophysical context for studie…
Quantifying torque from the Milky Way bar using Gaia DR2
Kipper, Rain; Tenjes, Peeter; Tuvikene, Taavi +2 more
We determine the mass of the Milky Way bar and the torque it causes, using Gaia DR2, by applying the orbital arc method. Based on this, we have found that the gravitational acceleration is not directed towards the centre of our Galaxy but a few degrees away from it. We propose that the tangential acceleration component is caused by the bar of the …
A Galactic dust devil: far-infrared observations of the Tornado supernova remnant candidate
De Looze, I.; Rho, J.; Dunne, L. +10 more
We present complicated dust structures within multiple regions of the candidate supernova remnant (SNR) the 'Tornado' (G357.7-0.1) using observations with Spitzer and Herschel. We use point process mapping, PPMAP, to investigate the distribution of dust in the Tornado at a resolution of 8 arcsec, compared to the native telescope beams of 5-36 arcs…
See Change: VLT spectroscopy of a sample of high-redshift Type Ia supernova host galaxies
Rubin, D.; Aldering, G.; Goobar, A. +10 more
The Supernova Cosmology Project has conducted the 'See Change' programme, aimed at discovering and observing high-redshift (1.13 ≤ z ≤ 1.75) Type Ia supernovae (SNe Ia). We used multifilter Hubble Space Telescope (HST) observations of massive galaxy clusters with sufficient cadence to make the observed SN Ia light curves suitable for a cosmologica…
An extensive spectroscopic time series of three Wolf-Rayet stars - II. A search for wind asymmetries in the dust-forming WC7 binary WR137
Garrel, T.; Knapen, J. H.; Mauclaire, B. +39 more
We present the results of a 4-month, spectroscopic campaign of the Wolf-Rayet dust-making binary, WR137. We detect only small-amplitude random variability in the C III λ5696 emission line and its integrated quantities (radial velocity, equivalent width, skewness, and kurtosis) that can be explained by stochastic clumps in the wind of the WC star. …
A rare case of FR I interaction with a hot X-ray bridge in the A2384 galaxy cluster
Durret, F.; Parekh, V.; Laganá, T. F. +3 more
Clusters of varying mass ratios can merge and the process significantly disturbs the cluster environments and alters their global properties. Active radio galaxies are another phenomenon that can also affect cluster environments. Radio jets can interact with the intracluster medium (ICM) and locally affect its properties. Abell 2384 (hereafter A23…
A super-Earth and a mini-Neptune around Kepler-59
Nesvorný, D.; Roig, F.; Saad-Olivera, X. +2 more
We characterize the radii and masses of the star and planets in the Kepler-59 system, as well as their orbital parameters. The star parameters are determined through a standard spectroscopic analysis, resulting in a mass of 1.359± 0.155 M_⊙ and a radius of 1.367± 0.078 R_⊙. The obtained planetary radii are 1.5± 0.1 R_\oplus for the inner and 2.2± …
J1110+4817 - a compact symmetric object candidate revisited
Krezinger, Máté; Frey, Sándor; An, Tao +2 more
Compact symmetric objects (CSOs) are radio-emitting active galactic nuclei (AGNs) typically with a double-lobed radio structure confined to within 1 kpc. CSOs represent the earliest evolutionary phase of jetted AGNs. Some of them may eventually evolve into large-scale extended double sources, while others stall within the host galaxy and die out, …