Now showing items 1-10 of 238
A new connection between the jet opening angle and the large-scale morphology of extragalactic radio sources
In the case of an initially conical jet, we study the relation between jet collimation by the external pressure and large-scale morphology. We first consider the important length-scales in the problem, and then carry out ...
Star formation in high-redshift quasars : Excess [Oii] emission in the radio-loud population
We investigate the [O ii] emission-line properties of 18 508 quasars at z < 1.6 drawn from the Sloan Digital Sky Survey (SDSS) quasar sample. The quasar sample has been separated into 1692 radio-loud and 16 816 radio-quiet ...
Photometrically derived masses and radii of the planet and star in the TrES-2 system
We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal variations and Doppler beaming on a period ...
High-Density, High-Resolution, Low-Cost Air Quality Sensor Networks for Urban Air Monitoring. The SNAQ Heathrow Project
Monitoring air quality in highly granular environments such as urban areas which are spatially heterogeneous with variable emission sources, measurements need to be made at appropriate spatial and temporal scales. Current ...
J-band variability of M dwarfs in the WFCAM Transit Survey
We present an analysis of the photometric variability of M dwarfs in the Wide Field Camera (WFCAM) Transit Survey. Although periodic light-curve variability in low mass stars is generally dominated by photospheric star ...
An ALMA survey of submillimetre galaxies in the Extended Chandra Deep Field-South : Detection of [Cii] at z = 4.4
We present Atacama Large Millimeter Array (ALMA) 870-μm (345-GHz) observations of two submillimetre galaxies (SMGs) drawn from an ALMA study of the 126 submillimetre sources from the LABOCA Extended Chandra Deep Field-South ...
Estimation of radiative forcing by the dust and non-dust content in mixed East Asian pollution plumes on the basis of depolarization ratios measured with lidar
The contribution of dust and non-dust aerosols to the lidar observed total backscattering was estimated from the linear particle depolarization ratios (delta(p)) under the assumption of externally mixed aerosols. During ...
Identifying ultra-cool dwarfs at low Galactic latitudes : a southern candidate catalogue
We present an ultra-cool dwarf (UCD) catalogue compiled from low southern Galactic latitudes and mid-plane, from a cross-correlation of the Two Micron All-Sky Survey (2MASS) and the SuperCOSMOS survey. The catalogue contains ...
Herschel-ATLAS : the far-infrared properties and star-formation rates of broad absorption line quasi-stellar objects
We have used data from the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) at 250, 350 and 500 μm to determine the far-infrared (FIR) properties of 50 broad absorption line quasars (BAL QSOs)
Retrieving the size of particles with rough and complex surfaces from two-dimensional scattering patterns
Scattered intensity measurement is a commonly used method for determining the size of small particles. However, it requires calibration and is subject to errors due to changes in incident irradiance or detector sensitivity. ...