All Outputs (253)

The Lyman α forest power spectrum from the XQ-100 legacy survey (2016)
Journal Article

We present the Lyman α flux power spectrum measurements of the XQ-100 sample of quasar spectra obtained in the context of the European Southern Observatory Large Programme ‘Quasars and their absorption lines: a legacy survey of the high redshift univ... Read More about The Lyman α forest power spectrum from the XQ-100 legacy survey.

Mechano-chemical manipulation of Sn chains on Si(1 0 0) by NC-AFM (2016)
Journal Article

We investigate the atomic structure of Sn dimer chains grown on the Si(1 0 0) surface using non-contact atomic force microscopy (NC-AFM) at cryogenic temperatures. We find that similar to the native Si(1 0 0) dimer structure, the ground state of the... Read More about Mechano-chemical manipulation of Sn chains on Si(1 0 0) by NC-AFM.

Dynamical scalar hair formation around a Schwarzschild black hole (2016)
Journal Article

Scalar fields coupled to the Gauss-Bonnet invariant evade the known no-hair theorems and have nontrivial configurations around black holes. We focus on a scalar field that couples linearly to the Gauss-Bonnet invariant and hence exhibits shift symmet... Read More about Dynamical scalar hair formation around a Schwarzschild black hole.

Constraining symmetron fields with atom interferometry (2016)
Journal Article

We apply the new constraints from atom-interferometry searches for screening mechanisms to the symmetron model, finding that these experiments exclude a previously unexplored region of the parameter space. We discuss the possibility of networks of do... Read More about Constraining symmetron fields with atom interferometry.

Stretching and Kibble scaling regimes for Hubble-damped defect networks (2016)
Journal Article

The cosmological evolution of topological defect networks can broadly be divided into two stages. At early times they are friction dominated due to particle scattering and therefore nonrelativistic and may either be conformally stretched or evolve in... Read More about Stretching and Kibble scaling regimes for Hubble-damped defect networks.

VALES. II. The physical conditions of interstellar gas in normal star-forming galaxies up to z=0.2 revealed by ALMA (2016)
Journal Article

We use new Band 3 CO(1–0) observations taken with the Atacama Large Millimeter/submillimeter Array (ALMA) to study the physical conditions in the interstellar gas of a sample of 27 dusty main-sequence star-forming galaxies at 0:03 < z < 0:2 present i... Read More about VALES. II. The physical conditions of interstellar gas in normal star-forming galaxies up to z=0.2 revealed by ALMA.

The direct-to-indirect band gap crossover in two-dimensional van der Waals Indium Selenide crystals (2016)
Journal Article

The electronic band structure of van der Waals (vdW) layered crystals has properties that depend on the composition, thickness and stacking of the component layers. Here we use density functional theory and high field magneto-optics to investigate th... Read More about The direct-to-indirect band gap crossover in two-dimensional van der Waals Indium Selenide crystals.

Investigation of electrically active defects in InGaAs quantum wire intermediate-band solar cells using deep-level transient spectroscopy (DLTS) technique (2016)
Journal Article

InGaAs quantum wire (QWr) intermediate-band solar cell based nanostructures grown by molecular beam epitaxy are studied. The electrical and interface properties of these solar cell devices, as determined by current–voltage (I–V) and capacitance–volta... Read More about Investigation of electrically active defects in InGaAs quantum wire intermediate-band solar cells using deep-level transient spectroscopy (DLTS) technique.

Prethermalization from a low-density Holstein-Primakoff expansion (2016)
Journal Article

We consider the non-equilibrium dynamics arising after a quench of the transverse magnetic field of a quantum Ising chain, together with the sudden switch-on of a long-range interaction term. The dynamics after the quantum quench is mapped onto a ful... Read More about Prethermalization from a low-density Holstein-Primakoff expansion.

Planck intermediate results. XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies (2016)
Journal Article

Using the Planck 2015 data release (PR2) temperature maps, we separate Galactic thermal dust emission from cosmic infrared background (CIB) anisotropies. For this purpose, we implement a specifically tailored component-separation method, the so-calle... Read More about Planck intermediate results. XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies.

Planck intermediate results. XLIV. Structure of the Galactic magnetic field from dust polarization maps of the southern Galactic cap (2016)
Journal Article

Using data from the Planck satellite, we study the statistical properties of interstellar dust polarization at high Galactic latitudes around the south pole (b < −60°). Our aim is to advance the understanding of the magnetized interstellar medium (IS... Read More about Planck intermediate results. XLIV. Structure of the Galactic magnetic field from dust polarization maps of the southern Galactic cap.

Planck intermediate results. XLVI. Reduction of large-scale systematic effects in HFI polarization maps and estimation of the reionization optical depth (2016)
Journal Article

This paper describes the identification, modelling, and removal of previously unexplained systematic effects in the polarization data of the Planck High Frequency Instrument (HFI) on large angular scales, including new mapmaking and calibration proce... Read More about Planck intermediate results. XLVI. Reduction of large-scale systematic effects in HFI polarization maps and estimation of the reionization optical depth.

Planck intermediate results. XLIX. Parity-violation constraints from polarization data (2016)
Journal Article

Parity-violating extensions of the standard electromagnetic theory cause in vacuo rotation of the plane of polarization of propagating photons. This effect, also known as cosmic birefringence, has an impact on the cosmic microwave background (CMB) an... Read More about Planck intermediate results. XLIX. Parity-violation constraints from polarization data.

Planck intermediate results. XLVII. Planck constraints on reionization history (2016)
Journal Article

We investigate constraints on cosmic reionization extracted from the Planck cosmic microwave background (CMB) data. We combine the Planck CMB anisotropy data in temperature with the low-multipole polarization data to fit ΛCDM models with various para... Read More about Planck intermediate results. XLVII. Planck constraints on reionization history.

Untangling galaxy components: full spectral bulge–disc decomposition (2016)
Journal Article

To ascertain whether photometric decompositions of galaxies into bulges and discs are astrophysically meaningful, we have developed a new technique to decompose spectral data cubes into separate bulge and disc components, subject only to the constrai... Read More about Untangling galaxy components: full spectral bulge–disc decomposition.

Feasibility of spatially-offset Raman spectroscopy for in-vitro and in-vivo monitoring mineralisation of bone tissue-engineering scaffolds (2016)
Journal Article

We investigated the feasibility of using spatially-offset Raman spectroscopy (SORS) for non-destructive characterisation of bone tissue engineering scaffolds. The deep regions of these scaffolds, or scaffolds implanted subcutaneously in live animals,... Read More about Feasibility of spatially-offset Raman spectroscopy for in-vitro and in-vivo monitoring mineralisation of bone tissue-engineering scaffolds.

Synchronization of micromasers (2016)
Journal Article

We investigate synchronization effects in quantum self-sustained oscillators theoretically using the micromaser as a model system. We use the probability distribution for the relative phase as a tool for quantifying the emergence of preferred phases... Read More about Synchronization of micromasers.

Far-field resonance fluorescence from a dipole-interacting laser-driven cold atomic gas (2016)
Journal Article

We analyze the temporal response of the fluorescence light that is emitted from a dense gas of cold atoms driven by a laser. When the average interatomic distance is comparable to the wavelength of the photons scattered by the atoms, the system exhib... Read More about Far-field resonance fluorescence from a dipole-interacting laser-driven cold atomic gas.

Galaxy formation through cosmic recycling (2016)
Journal Article

Extremely massive galaxies are seen in the young universe, but their presence is puzzling because we do not yet understand how they became so massive so quickly. How do they get enough fuel to form stars so rapidly? The raw fuel for forming stars is... Read More about Galaxy formation through cosmic recycling.

Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO2 nanomaterials for antibacterial applications (2016)
Journal Article

To photo-catalytically degrade RhB dye using solar irradiation, CeO2 doped TiO2 nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related... Read More about Photodegradation of organic pollutants RhB dye using UV simulated sunlight on ceria based TiO2 nanomaterials for antibacterial applications.