Search Publications
The data processing pipeline for the Herschel SPIRE Fourier Transform Spectrometer
Valtchanov, I.; Hopwood, R.; Lu, N. +13 more
We present the data processing pipeline to generate calibrated data products from the Spectral and Photometric Imaging Receiver (SPIRE) imaging Fourier Transform Spectrometer on the Herschel Space Observatory. The pipeline processes telemetry from SPIRE observations and produces calibrated spectra for all resolution modes. The spectrometer pipelin…
The ISW effect and the lack of large-angle CMB temperature correlations
Starkman, Glenn D.; Copi, Craig J.; O'Dwyer, Márcio
It is by now well established that the magnitude of the two-point angular-correlation function of the cosmic microwave background temperature anisotropies is anomalously low for angular separations greater than about 60°. Physics explanations of this anomaly typically focus on the properties of the Universe at the surface of last scattering, relyi…
Far-infrared/submillimetre properties of pre-stellar cores L1521E, L1521F and L1689B as revealed by the Herschel SPIRE instrument - I. Central positions
Abergel, A.; Ward-Thompson, D.; van der Wiel, M. H. D. +5 more
Dust grains play a key role in the physics of star-forming regions, even though they constitute only ∼1 per cent of the mass of the interstellar medium. The derivation of accurate dust parameters such as temperature (Td), emissivity spectral index (β) and column density requires broad-band continuum observations at far-infrared waveleng…
Modelling the structure of molecular clouds - I. A multiscale energy equipartition
Klessen, Ralf S.; Veltchev, Todor V.; Donkov, Sava
We present a model for describing the general structure of molecular clouds (MCs) at early evolutionary stages in terms of their mass-size relationship. Sizes are defined through threshold levels at which equipartitions between gravitational, turbulent and thermal energy |W| ∼ f(Ekin + Eth) take place, adopting interdependent…
A new model of the microwave polarized sky for CMB experiments
Bonaldi, Anna; Brown, Michael L.; Hervías-Caimapo, Carlos
We present a new model of the microwave sky in polarization that can be used to simulate data from cosmic microwave background polarization experiments. We exploit the most recent results from the Planck satellite to provide an accurate description of the diffuse polarized foreground synchrotron and thermal dust emission. Our model can include the…
Far-infrared and sub-millimetre imaging of HD 76582's circumstellar disc
Matthews, Brenda C.; Booth, Mark; Zuckerman, Ben +3 more
Debris discs, the tenuous rocky and icy remnants of planet formation, are believed to be evidence for planetary systems around other stars. The JCMT/SCUBA-2 debris disc legacy survey `SCUBA-2 Observations of Nearby Stars' (SONS) observed 100 nearby stars, amongst them HD 76582, for evidence of such material. Here, we present imaging observations b…
Searching for molecular outflows in hyperluminous infrared galaxies
Sturm, E.; Veilleux, S.; Bauer, F. E. +5 more
We present constraints on the molecular outflows in a sample of five hyperluminous infrared galaxies using Herschel observations of the OH doublet at 119 µm. We have detected the OH doublet in three cases: one purely in emission and two purely in absorption. The observed emission profile has a significant blueshifted wing suggesting the poss…
A systematic search for lensed high-redshift galaxies in HST images of MACS clusters
Richard, J.; Ebeling, H.; Repp, A.
We present the results of a 135-arcmin2 search for high-redshift galaxies lensed by 29 clusters from the MAssive Cluster and extended MAssive Cluster Surveys. We use relatively shallow images obtained with the Hubble Space Telescope in four passbands, namely, F606W, F814W, F110W, and F140W. We identify 130 F814W dropouts as candidates f…
NuSTAR and XMM-Newton observations of the ultraluminous X-ray source NGC 5643 X-1
Krivonos, Roman; Sazonov, Sergey
We present a high-quality hard X-ray spectrum of the ultraluminous X-ray source (ULX) NGC 5643 X-1 measured with NuSTAR in 2014 May-June. We have obtained this spectrum by carefully separating the signals from the ULX and from the active nucleus of its host galaxyNGC 5643 located 0.8 arcmin away. Together with long XMM-Newton observations performe…
The soft X-ray spectrum of the high-mass X-ray binary V0332+53 in quiescence
Heinke, Craig O.; Elshamouty, Khaled G.; Chouinard, Rhys
The behaviour of neutron stars in high-mass X-ray binaries (HMXBs) during periods of low mass transfer is of great interest. Indications of spectral softening in systems at low mass-transfer rates suggest that some HMXBs are undergoing fundamental changes in their accretion regime, but the nature of the quiescent X-ray emission is not clear. We pe…