Search Publications
Fast spectrophotometry of WD 1145+017
Villaver, Eva; Raddi, Roberto; Gänsicke, Boris T. +16 more
WD 1145+017 is currently the only white dwarf known to exhibit periodic transits of planetary debris as well as absorption lines from circumstellar gas. We present the first simultaneous fast optical spectrophotometry and broad-band photometry of the system, obtained with the Gran Telescopio Canarias (GTC) and the Liverpool Telescope, respectively…
SHARDS: constraints on the dust attenuation law of star-forming galaxies at z ∼ 2
Barro, Guillermo; Pérez-González, Pablo G.; Cava, Antonio +11 more
We make use of the Survey of High-z Absorption Red and Dead Sources, an ultradeep (<26.5AB) galaxy survey that provides optical photospectra at resolution R ∼ 50, via medium-band filters (FWHM ∼ 150 Å). This data set is combined with ancillary optical and NIR fluxes to constrain the dust attenuation law in the rest-frame NUV region of star-form…
ALMA observation of the disruption of molecular gas in M87
Simionescu, A.; Allen, S. W.; Werner, N. +3 more
We present the results from Atacama Large Millimeter Array (ALMA) observations centred 40 arcsec (3 kpc in projection) south-east of the nucleus of M87. We report the detection of extended CO (2-1) line emission with a total flux of (5.5 ± 0.6) × 10-18 erg s-1 cm-2 and corresponding molecular gas mass M_{H_2}=(4.7 …
The radius of the quiescent neutron star in the globular cluster M13
Campana, S.; Heinke, C. O.; Cohn, H. N. +5 more
X-ray spectra of quiescent low-mass X-ray binaries containing neutron stars can be fit with atmosphere models to constrain the mass and the radius. Mass-radius constraints can be used to place limits on the equation of state of dense matter. We perform fits to the X-ray spectrum of a quiescent neutron star in the globular cluster M13, utilizing da…
The GALAH survey: accurate radial velocities and library of observed stellar template spectra
Ting, Yuan-Sen; Casey, Andrew R.; Buder, Sven +34 more
GALAH is a large-scale magnitude-limited southern stellar spectroscopic survey. Its second data release (GALAH DR2) provides values of stellar parameters and abundances of 23 elements for 342 682 stars (Buder et al.). Here we add a description of the public release of radial velocities with a typical accuracy of 0.1 km s-1 for 336 215 o…
The very faint X-ray binary IGR J17062-6143: a truncated disc, no pulsations, and a possible outflow
Altamirano, D.; Degenaar, N.; Wijnands, R. +10 more
We present a comprehensive X-ray study of the neutron star low-mass X-ray binary IGR J17062-6143, which has been accreting at low luminosities since its discovery in 2006. Analysing NuSTAR, XMM-Newton, and Swift observations, we investigate the very faint nature of this source through three approaches: modelling the relativistic reflection spectru…
Multiwavelength observations of V407 Lupi (ASASSN-16kt) - a very fast nova erupting in an intermediate polar
Ness, J. -U.; Henze, M.; Kniazev, A. +19 more
We present a detailed study of the 2016 eruption of nova V407 Lupi (ASASSN-16kt), including optical, near-infrared, X-ray, and ultraviolet data from SALT, SMARTS, SOAR, Chandra, Swift, and XMM-Newton. Timing analysis of the multiwavelength light curves shows that, from 168 d post-eruption and for the duration of the X-ray supersoft source phase, t…
High-precision multiwavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b
Bouchy, F.; Magain, P.; Queloz, D. +14 more
We present 16 occultation and three transit light curves for the ultra-short period hot Jupiter WASP-103b, in addition to five new radial velocity measurements. We combine these observations with archival data and perform a global analysis of the resulting extensive data set, accounting for the contamination from a nearby star. We detect the therm…
SEAGLE - I. A pipeline for simulating and modelling strong lenses from cosmological hydrodynamic simulations
Crain, Robert A.; Schaye, Joop; Theuns, Tom +8 more
In this paper we introduce the SEAGLE (i.e. Simulating EAGLE LEnses) programme, which approaches the study of galaxy formation through strong gravitational lensing, using a suite of high-resolution hydrodynamic simulations, Evolution and Assembly of GaLaxies and their Environments (EAGLE) project. We introduce the simulation and analysis pipeline …
Prevalence of neutral gas in centres of merging galaxies
Srianand, R.; Gupta, N.; Dutta, R.
We present Giant Metrewave Radio Telescope and Very Large Array observations of H I 21-cm absorption in 10 z ≤ 0.2 galaxy mergers that host strong radio sources. Seven of these mergers show strong absorption [with N({H I}) ∼ 1021 - 22 cm-2, for spin temperature of 100 K and unit covering factor]. Including literature sources,…