Search Publications
The Gaia-ESO Survey: asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2
Gilmore, G.; Bayo, A.; Koposov, S. E. +25 more
The combination of precise radial velocities from multi-object spectroscopy and highly accurate proper motions from Gaia DR2 opens up the possibility for detailed 3D kinematic studies of young star-forming regions and clusters. Here, we perform such an analysis by combining Gaia-ESO Survey spectroscopy with Gaia astrometry for ∼900 members of the …
A dust and gas cavity in the disc around CQ Tau revealed by ALMA
Henning, Thomas; Kwon, Woojin; Testi, Leonardo +23 more
The combination of high-resolution and sensitivity offered by ALMA is revolutionizing our understanding of protoplanetary discs, as their bulk gas and dust distributions can be studied independently. In this paper we present resolved ALMA observations of the continuum emission (λ = 1.3 mm) and CO isotopologues (12CO, 13CO, C<…
SIGNALS: I. Survey description
Barmby, P.; Morisset, C.; Lyman, J. D. +61 more
SIGNALS, the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey, is a large observing programme designed to investigate massive star formation and H II regions in a sample of local extended galaxies. The programme will use the imaging Fourier transform spectrograph SITELLE at the Canada-France-Hawaii Telescope. Over 355 h (54.7 nigh…
The magnetic propeller accretion regime of LkCa 15
Moutou, C.; Ménard, F.; Carmona, A. +12 more
We present a spectropolarimetric study of the classical T Tauri star (cTTS) LkCa 15 investigating the large-scale magnetic topology of the central star and the way the field connects to the inner regions of the accretion disc. We find that the star hosts a strong poloidal field with a mainly axisymmetric dipole component of 1.35 kG, whereas the ma…
Transverse kinematics of the Galactic bar-bulge from VVV and Gaia
Evans, N. Wyn; Sanders, Jason L.; Lucas, Philip +1 more
We analyse the kinematics of the Galactic bar-bulge using proper motions from the ESO public survey Vista Variables in the Via Lactea (VVV) and the second Gaia data release. Gaia has provided some of the first absolute proper motions within the bulge and the near-infrared VVV multi-epoch catalogue complements Gaia in highly extincted low-latitude …
The shapes of the rotation curves of star-forming galaxies over the last ≈10 Gyr
Bacon, Roland; Smail, Ian; Swinbank, A. M. +16 more
We analyse maps of the spatially resolved nebular emission of ≈1500 star-forming galaxies at z ≈ 0.6-2.2 from deep K-band Multi-Object Spectrograph and MUSE observations to measure the average shape of their rotation curves. We use these to test claims for declining rotation curves at large radii in galaxies at z ≈ 1-2 that have been interpreted a…
Particle re-acceleration and Faraday-complex structures in the RXC J1314.4-2515 galaxy cluster
Dallacasa, D.; Vazza, F.; Botteon, A. +9 more
Radio relics are sites of electron (re)acceleration in merging galaxy clusters but the mechanism of acceleration and the topology of the magnetic field in and near relics are yet to be understood. We are carrying out an observational campaign on double relic galaxy clusters starting with RXC J1314.4-2515. With Jansky Very Large Array multiconfigur…
Infrared-excess white dwarfs in the Gaia 100 pc sample
Solano, E.; Rebassa-Mansergas, A.; Torres, S. +3 more
We analyse the 100 pc Gaia white dwarf volume-limited sample by means of VOSA (Virtual Observatory SED Analyser) with the aim of identifying candidates for displaying infrared excesses. Our search focuses on the study of the spectral energy distribution (SED) of 3733 white dwarfs with reliable infrared photometry and GBP - GRP
Exploring the M-dwarf Luminosity-Temperature-Radius relationships using Gaia DR2
Naylor, Tim; Morrell, Sam
There is growing evidence that M-dwarf stars suffer radius inflation when compared to theoretical models, suggesting that models are missing some key physics required to completely describe stars at effective temperatures less than about 4000 K. The advent of Gaia DR2 distances finally makes available large data sets to determine the nature and ex…
The metal-rich atmosphere of the exo-Neptune HAT-P-26b
Madhusudhan, Nikku; MacDonald, Ryan J.
Transmission spectroscopy is enabling precise measurements of atmospheric H2O abundances for numerous giant exoplanets. For hot Jupiters, relating H2O abundances to metallicities provides a powerful probe of their formation conditions. However, metallicity measurements for Neptune-mass exoplanets are only now becoming viable.…