Search Publications
Molecular gas in submillimetre-faint, star-forming ultraluminous galaxies at z > 1
Muxlow, T. W. B.; Smail, I.; Genzel, R. +12 more
We present interferometric CO observations of 12 z∼ 2 submillimetre-faint, star-forming radio galaxies (SFRGs) which are thought to be ultraluminous infrared galaxies (ULIRGs) possibly dominated by warmer dust (Tdust ≳ 40 K) than submillimetre galaxies (SMGs) of similar luminosities. Four other CO-observed SFRGs are included from the li…
An extended XMM-Newton observation of the Seyfert galaxy NGC 4051 - I. Evidence for a shocked outflow
Vaughan, S.; Pounds, K. A.
An extended XMM-Newton observation of the Seyfert 1 galaxy NGC 4051 has revealed a rich absorption line spectrum indicating the presence of a photoionized outflow with a wide range of velocities and ionization parameter. At low continuum fluxes an emission line spectrum is well defined with both narrow and broad emission components of several abun…
Ordered magnetic fields around radio galaxies: evidence for interaction with the environment
Guidetti, D.; Parma, P.; Laing, R. A. +2 more
We present detailed imaging of Faraday rotation and depolarization for the radio galaxies 0206+35, 3C 270, 3C 353 and M 84, based on Very Large Array observations at multiple frequencies in the range 1365 to 8440 MHz. All of the sources show highly anisotropic banded rotation measure (RM) structures with contours of constant RM perpendicular to th…
Galaxy properties in different environments up to z∼ 3 in the GOODS NICMOS Survey
Conselice, Christopher J.; Bluck, Asa F. L.; Mortlock, Alice +4 more
We study the relationship between galaxy colour, stellar mass and local galaxy density in a deep near-infrared imaging survey up to a redshift of z∼ 3 using the GOODS (Great Observatories Origins Deep Survey) NICMOS (Near Infrared Camera and Multi-Object Spectrometer) Survey (GNS). The GNS is a deep near-infrared Hubble Space Telescope survey imag…
Multistate observations of the Galactic black hole XTE J1752-223: evidence for an intermediate black hole spin
Wijnands, R.; Fabian, A. C.; Miller, J. M. +6 more
The Galactic black hole candidate XTE J1752-223 was observed during the decay of its 2009 outburst with the Suzaku and XMM-Newton observatories. The observed spectra are consistent with the source being in the ‘intermediate’ and ‘low-hard’ states, respectively. The presence of a strong, relativistic iron emission line is clearly detected in both o…
Luminous starbursts in the redshift desert at z∼ 1-2: star formation rates, masses and evidence for outflows
Ivison, R. J.; Smail, Ian; Dunlop, J. S. +5 more
We present a spectroscopic catalogue of 40 luminous starburst galaxies at z= 0.7-1.7 (median z= 1.3). 19 of these are submillimetre galaxies (SMGs) and 21 are submillimetre-faint radio galaxies (SFRGs). This sample helps us to fill in the redshift desert at z= 1.2-1.7 in previous studies as well as to probe a lower luminosity population of galaxie…
A new globular cluster black hole in NGC 4472
Kundu, Arunav; Zepf, Stephen E.; Maccarone, Thomas J. +1 more
We discuss CXOU 1229410+075744, a new black hole candidate in a globular cluster in the elliptical galaxy NGC 4472. By comparing two Chandra observations of the galaxy, we find a source that varies by at least a factor of 4, and has a peak luminosity of at least 2 × 1039 erg s-1. As such, the source varies by significantly mo…
Searching for Compton-thick active galactic nuclei at z∼ 0.1
Alexander, D. M.; Watson, M. G.; Ward, M. +4 more
Using a suite of X-ray, mid-infrared (mid-IR) and optical active galactic nuclei (AGN) luminosity indicators, we search for Compton-thick AGNs with intrinsic LX > 1042 erg s-1 at z∼ 0.03-0.2, a region of parameter space which is currently poorly constrained by deep narrow-field and high-energy (E > 10 keV) al…
On the nature of the progenitors of three Type II-P supernovae: 2004et, 2006my and 2006ov
Smartt, S. J.; Maund, J. R.; Mattila, S. +4 more
The pre-explosion observations of the Type II-P supernovae 2006my, 2006ov and 2004et are re-analysed. In the cases of supernovae 2006my and 2006ov we argue that the published candidate progenitors are not coincident with their respective supernova sites in pre-explosion Hubble Space Telescope observations. We therefore derive upper luminosity and …
Contemporaneous Chandra HETG and Suzaku X-ray observations of NGC 4051
Turner, T. J.; Kraemer, S. B.; Crenshaw, D. M. +4 more
We present the results of a deep 300 ks Chandra High Energy Transmission Grating (HETG) observation of the highly variable narrow-line Seyfert Type 1 galaxy NGC 4051. The HETG spectrum reveals 28 significant soft X-ray ionized lines in either emission or absorption; primarily originating from H-like and He-like K-shell transitions of O, Ne, Mg and…