Search Publications
JINGLE, a JCMT legacy survey of dust and gas for galaxy evolution studies - I. Survey overview and first results
Lamperti, Isabella; Saintonge, Amélie; Ho, Luis C. +88 more
JINGLE is a new JCMT legacy survey designed to systematically study the cold interstellar medium of galaxies in the local Universe. As part of the survey we perform 850 µm continuum measurements with SCUBA-2 for a representative sample of 193 Herschel-selected galaxies with M* > 109 M⊙, as well as integrated CO(…
Persistent magnetic vortex flow at a supergranular vertex
Bellot Rubio, Luis R.; Gošić, Milan; Requerey, Iker S. +1 more
Context. Photospheric vortex flows are thought to play a key role in the evolution of magnetic fields. Recent studies show that these swirling motions are ubiquitous in the solar surface convection and occur in a wide range of temporal and spatial scales. Their interplay with magnetic fields is poorly characterized, however.
Aims: We study th…
Magnetism, X-rays and accretion rates in WD 1145+017 and other polluted white dwarf systems
Gänsicke, B. T.; Fossati, L.; Redfield, S. +9 more
This paper reports circular spectropolarimetry and X-ray observations of several polluted white dwarfs including WD 1145+017, with the aim to constrain the behaviour of disc material and instantaneous accretion rates in these evolved planetary systems. Two stars with previously observed Zeeman splitting, WD 0322-019 and WD 2105-820, are detected a…
The stellar population and initial mass function of NGC 1399 with MUSE
Davies, Roger L.; Houghton, Ryan C. W.; Vaughan, Sam P. +1 more
We present spatially resolved measurements of the stellar initial mass function (IMF) in NGC 1399, the largest elliptical galaxy in the Fornax Cluster. Using data from the Multi Unit Spectroscopic Explorer (MUSE) and updated state-of-the-art stellar population synthesis models from Conroy et al., we use full spectral fitting to measure the low-mas…
High-precision Orbit Fitting and Uncertainty Analysis of (486958) 2014 MU69
Tanga, Paolo; Stern, S. Alan; Kavelaars, J. J. +11 more
NASA’s New Horizons spacecraft will conduct a close flyby of the cold-classical Kuiper Belt Object (KBO) designated (486958) 2014 MU69 on 2019 January 1. At a heliocentric distance of 44 au, “MU69” will be the most distant object ever visited by a spacecraft. To enable this flyby, we have developed an extremely high-precision orbit fitting and unc…
New giant radio sources and underluminous radio halos in two galaxy clusters
Brunetti, G.; Kale, R.; Venturi, T. +5 more
Aims: The aim of this work is to analyse the radio properties of the massive and dynamically disturbed clusters Abell 1451 and Zwcl 0634.1+4750, especially focusing on the possible presence of diffuse emission.
Methods: We present new Giant Metrewave Radio Telescope (GMRT) 320 MHz and Jansky Very Large Array (JVLA) 1.5 GHz observations o…
Three-Dimensional Turbulence-Resolving Modeling of the Venusian Cloud Layer and Induced Gravity Waves: Inclusion of Complete Radiative Transfer and Wind Shear
Spiga, A.; Lebonnois, S.; Lefèvre, M.
Venus' convective cloud layers and associated gravity waves strongly impact the local and global budget of heat, momentum, and chemical species. Here we use for the first time three-dimensional turbulence-resolving dynamical integrations of Venus' atmosphere from the surface to 100-km altitude, coupled with fully interactive radiative transfer com…
Discovery of synchronous X-ray and radio moding of PSR B0823+26
Tiburzi, C.; Grießmeier, J. -M.; Serylak, M. +10 more
Simultaneous observations of PSR B0823+26 with ESA's XMM-Newton, the Giant Metrewave Radio Telescope and international stations of the Low Frequency Array revealed synchronous X-ray/radio switching between a radio-bright (B) mode and a radio-quiet (Q) mode. During the B mode we detected PSR B0823+26 in 0.2 - 2 keV X-rays and discovered pulsed emis…
The Shocking Power Sources of LINERs
Ho, Luis C.; Maoz, Dan; Shields, Joseph C. +5 more
The majority of low-ionization nuclear emission-line regions (LINERs) harbor supermassive black holes with very low accretion rates. However, the accretion flows do not produce enough ionizing photons to power the emission lines emitted on scales of ∼100 pc, and therefore additional sources of power are required. We present and analyze Hubble Spac…
The 0.8-4.5 µm Broadband Transmission Spectra of TRAPPIST-1 Planets
Queloz, D.; Agol, E.; Delrez, L. +18 more
The TRAPPIST-1 planetary system provides an exceptional opportunity for the atmospheric characterization of temperate terrestrial exoplanets with the upcoming James Webb Space Telescope (JWST). Assessing the potential impact of stellar contamination on the planets’ transit transmission spectra is an essential precursor to this characterization. Pl…