Search Publications
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…
Galaxy gas ejection in radio galaxies: the case of 3C 35
Birkinshaw, M.; Worrall, D. M.; Mannering, E.
We report results from XMM-Newton and Chandra observations of the nearby (z = 0.067) giant radio galaxy 3C 35. We find evidence for an X-ray-emitting gas belt, orthogonal to and lying between the lobes of 3C 35, which we interpret as fossil-group gas driven outwards by the expanding radio lobes. We also detect weak emission from a second, more ext…
Colour gradients of high-redshift early-type galaxies from hydrodynamical monolithic models
Matteucci, F.; Napolitano, N. R.; Tortora, C. +2 more
We analyse the evolution of colour gradients predicted by the hydrodynamical models of early-type galaxies (ETGs) in Pipino et al., which reproduce fairly well the chemical abundance pattern and the metallicity gradients of local ETGs. We convert the star formation (SF) and metal content into colours by means of stellar population synthetic model …
Variable dust formation by the colliding-wind Wolf-Rayet system HD 36402 in the Large Magellanic Cloud
Gruendl, R. A.; Chu, Y. -H.; Guerrero, M. A. +1 more
Infrared photometry of the probable triple WC4(+O?)+O8I: Wolf-Rayet system HD 36402 (= BAT99-38) in the Large Magellanic Cloud shows emission characteristic of heated dust. The dust emission is variable on a time-scale of years, with a period near 4.7 yr, possibly associated with orbital motion of the O8 supergiant and the inner P ≃ 3.03-d WC4+O b…
Constraining the luminosity function of faint undetected i-dropout galaxies
Koekemoer, A. M.; Stiavelli, M.; Morelli, L. +5 more
We present a new technique to quantify the light contribution coming from the faint high-redshift (z ∼ 6) galaxies below the detection threshold of imaging data, set conventionally at S/N = 4.5. We illustrate the technique with an application to Hubble Space Telescope Advanced Camera for Surveys images in the F775W and F850LP filters of the Ultra …