Search Publications
Herschel-ATLAS/GAMA: the environmental density of far-infrared bright galaxies at z ≤ 0.5
Ivison, R. J.; Cooray, A.; Ibar, E. +21 more
We compare the environmental and star formation properties of far-infrared detected and non-far-infrared detected galaxies out to z ∼ 0.5. Using optical spectroscopy and photometry from the Galaxy And Mass Assembly (GAMA) and Sloan Digital Sky Survey, with far-infrared observations from the Herschel Astrophysical Terahertz Large Area Survey (ATLAS…
A report on the X-ray properties of the τ Sco-like stars
Massa, D.; Oskinova, L. M.; Ignace, R.
An increasing number of OB stars have been shown to possess magnetic fields. Although the sample remains small, it is surprising that the magnetic and X-ray properties of these stars appear to be far less correlated than expected. This contradicts model predictions, which generally indicate that the X-rays from magnetic stars are harder and more l…
VLT/FORS2 observations of four high-luminosity ULX candidates
Fabian, A. C.; Miniutti, G.; Roberts, T. P. +4 more
We obtained Very Large Telescope/FOcal Reducer and low dispersion Spectrograph spectra of the optical counterparts of four high-luminosity (LX ≥ 1040 erg s-1) Ultraluminous X-ray sources (ULX) candidates from the catalogue of Walton et al. We first determined accurate positions for the X-ray sources from archival C…
Observations of 6-200 µm emission of the Ophiuchus cloud LDN 1688
Juvela, M.; Lemke, D.; Lehtinen, K. +2 more
We examine two positions, ON1 and ON2, within the Ophiuchus cloud LDN 1688 using observations made with the ISO photo-polarimeter (ISOPHOT) instrument aboard the Infrared Space Observatory (ISO) satellite. The data include mid-infrared spectra (∼6-12 µm) and several photometric bands up to 200 µm. The data probe the emission from molec…
Sub-millimetre source identifications and the microjansky source population at 8.4 GHz in the William Herschel Deep Field
Heywood, I.; Rawlings, S.; Metcalfe, N. +4 more
Sub-millimetre observations of the William Herschel Deep Field (WHDF) using the Large Apex Bolometer Camera (LABOCA) revealed possible sub-mm counterparts for two X-ray-absorbed quasars. The primary aim here is to exploit Expanded Very Large Array (EVLA) radio continuum imaging at 8.4 GHz to establish the absorbed quasars as radio/sub-mm sources. …
The runaway binary LP 400-22 is leaving the Galaxy
Gianninas, A.; Kenyon, S. J.; Heinke, Craig O. +7 more
We present optical spectroscopy, astrometry, radio and X-ray observations of the runaway binary LP 400-22. We refine the orbital parameters of the system based on our new radial velocity observations. Our parallax data indicate that LP 400-22 is significantly more distant (3σ lower limit of 840 pc) than initially predicted. LP 400-22 has a tangent…
Erratum: The Herschel PEP/HerMES Luminosity Function - I. Probing the Evolution of PACS selected Galaxies to z ≃ 4
Berta, S.; Magnelli, B.; Nordon, R. +100 more
XMM-Newton/Reflection Grating Spectrometer detection of the missing interstellar O VII Kα absorption line in the spectrum of Cyg X-2
Wang, Q. Daniel; Yao, Yangsen; Cabot, Samuel H. C.
The hot interstellar medium is an important part of the Galactic ecosystem and can be effectively characterized through X-ray absorption line spectroscopy. However, in a study of the hot medium using the accreting neutron star X-ray binary, Cyg X-2, as a background light source, a mystery came about when the putatively strong O VII Kα line was not…
Radiative transfer modelling of dust in IRAS 18333-2357: the only planetary nebula in the metal-poor globular cluster M22
Parthasarathy, M.; Ita, Y.; Muthumariappan, C.
We report results from our 1D radiative transfer modelling of dust in the hydrogen-deficient planetary nebula IRAS 18333-2357 located in the globular cluster M22. A spectral energy distribution was constructed from archival UV, optical and IR data including Akari photometry at its 18, 65, 90, 140 and 160 µm bands. An archival Spitzer spectru…
A submillimetre-bright z ~ 3 overdensity behind a z ~ 1 supercluster revealed by SCUBA-2 and Herschel.
Gladders, M. D.; Ivison, R. J.; Yee, H. K. C. +8 more
We present a wide-field (30 arcmin diameter) 850 µm Submillimetre Common-User Bolometer Array-2 map of the spectacular three-component merging supercluster, RCS 231953+00, at z = 0.9. The brightest submillimetre galaxy (SMG) in the field (S850 ≈ 12 mJy) is within 30 arcsec of one of the cluster cores (RCS 2319-C), and is likely to…