Search Publications
The Magellanic Bridge: evidence for a population of X-ray binaries
Haberl, F.; Coe, M. J.; Bird, A. J. +3 more
INTEGRAL observations of the Small Magellanic Cloud region have resulted in the serendipitous detection of two transient hard X-ray sources in the Magellanic Bridge. In this paper, we present the timing and spectral characteristics of these sources across the 2-100keV energy range, which, in conjunction with their optical counterparts, demonstrate…
Linear radio structures in selected Seyfert galaxies
Richards, A. M. S.; Thean, A. H. C.; Pedlar, A. +1 more
High-resolution Multi-Element Radio Linked Interferometer Network 5-GHz observations of seven Seyfert galaxies, selected as the ones previously showing evidence of collimated ejection, have been compared with high-resolution Hubble Space Telescope data. A radio and optical/near-ultraviolet emission correlation is apparent in all the sources. The r…
Kinematics and velocity ellipsoid of the F giants
Branham, Richard L., Jr.
To study the kinematics of the F giant stars (luminosity class III), proper motions taken from van Leeuwen's new reduction of the Hipparcos catalogue are used. 591 stars, of which 222 have radial velocities, were used in the final study. Semi-definite programming solves for the kinematical parameters such as the Oort constants and simultaneously f…
Mid-infrared diagnostics of metal-rich HII regions from VLT and Spitzer spectroscopy of young massive stars in W31
Crowther, P. A.; Morris, P. W.; Conti, P. S. +4 more
We present near-infrared Very Large Telescope/Infrared Spectrograph and Array Camera and mid-infrared (mid-IR) Spitzer/Infrared Spectrograph spectroscopy of the young massive cluster in the W31 star-forming region. H-band spectroscopy provides refined classifications for four cluster member O stars with respect to Blum et al. In addition, photosph…
The association between gas and galaxies - III. The cross-correlation of galaxies and Lyα absorbers† at z ~ 1
Morris, Simon L.; Shone, Allen M.; Crighton, Neil +1 more
We have measured the two-dimensional two-point correlation function, ξAG, between low-column-density Lyα absorbers and galaxies at a redshift z ~ 1. We measured Lyα absorbers between redshifts z = 0.68 and 1.51 over a total redshift path length of Δz = 1.08 from Hubble Space Telescope Space Telescope Imaging Spectrograph E230M absorptio…
The origin of the X-ray-emitting plasma in the eastern edge of the Cygnus Loop
Miceli, Marco; Orlando, Salvatore; Bocchino, Fabrizio +2 more
The Cygnus Loop is interacting with a protrusion of the cavity wall in its eastern edge (the XA region), where the X-ray emission is very bright. The complexity of the environment and the non-linear physical processes of the shock-cloud interaction make the origin of the X-ray emission still not well understood. Our purpose is to understand the ph…
Modelling Herschel observations of infrared-dark clouds in the Hi-GAL survey
Griffin, M. J.; Ward-Thompson, D.; Molinari, S. +5 more
We demonstrate the use of the 3D Monte Carlo radiative transfer code PHAETHON to model infrared-dark clouds (IRDCs) that are externally illuminated by the interstellar radiation field (ISRF). These clouds are believed to be the earliest observed phase of high-mass star formation, and may be the high-mass equivalent of lower mass pre-stellar cores.…
Evolution of the X-ray profiles of poor clusters from the XMM-LSS survey
Pierre, Marguerite; Pacaud, Florian; Ponman, Trevor +1 more
A sample consisting of 27 X-ray-selected galaxy clusters from the X-ray Multi-Mirror Large-Scale Structure (XMM-LSS) survey is used to study the evolution in the X-ray surface brightness profiles of the hot intracluster plasma. These systems are mostly groups and poor clusters, with temperatures 0.6-4.8keV, spanning the redshift range 0.05 to 1.05…
The Deep SPIRE HerMES Survey: spectral energy distributions and their astrophysical indications at high redshift
Altieri, B.; Aussel, H.; Elbaz, D. +70 more
The Spectral and Photometric Imaging Receiver on-board Herschel has been carrying out deep extragalactic surveys, one of the aims of which is to establish spectral energy distributions of individual galaxies spanning the infrared/submillimetre (IR/SMM) wavelength region. We report observations of the IR/SMM emission from the Lockman North field an…
The Type Ib supernova 2010O: an explosion in a Wolf-Rayet X-ray binary?
Nelemans, Gijs; Voss, Rasmus; Nielsen, Mikkel T. B. +1 more
The Type Ib supernova 2010O was recently discovered in the interacting starburst galaxy Arp 299. We present an analysis of two archival Chandra X-ray observations of Arp 299 taken before the explosion and show that there is a transient X-ray source at a position consistent with the supernova. Due to the diffuse emission, the background is difficul…