Search Publications
An X-ray emission-line spectrum of Nova V382Velorum 1999
Schmitt, J. H. M. M.; Ness, J. -U.; Jordan, C. +2 more
We report on the analysis of an X-ray grating spectrum of the Classical Nova V382Vel (1999), obtained with the Low Energy Transmission Grating (LETG)+HRC-S instrument onboard Chandra, which shows emission lines dominating over any continuum. Lines of Si, Mg, Ne, O, N and C are identified, but no Fe lines are detected. The total luminosity in the l…
X-ray observations of the edge-on star-forming galaxy NGC 891 and its supernova SN1986J
Stevens, Ian R.; Raychaudhury, Somak; Temple, Rowan F.
We present XMM-Newton observations of NGC 891, a nearby edge-on spiral galaxy. We analyse the extent of the diffuse emission emitted from the disc of the galaxy, and find that it has a single-temperature profile with best-fitting temperature of 0.26 keV, though the fit of a dual-temperature plasma with temperatures of 0.08 and 0.30 keV is also acc…
The connection between ultraviolet and X-ray outflows in active galactic nuclei: the case of PDS 456
Simpson, Chris; O'Brien, Paul T.; Reeves, James N. +1 more
High-velocity outflows from active galactic nuclei are a well-known phenomenon in terms of the broad absorption lines seen in the ultraviolet/optical. More recently, similar, possibly related, outflows have been reported in the X-ray. The most extreme example is seen in the nearby, luminous QSO PDS 456, which displays a massive, high-velocity (500…
Spatially resolved spectroscopy of the E+A galaxies in the z= 0.32 cluster AC 114
Kuntschner, Harald; Bekki, Kenji; Colless, Matthew +5 more
We present spatially resolved intermediate-resolution spectroscopy of a sample of 12 E+A galaxies in the z= 0.32 rich galaxy cluster AC 114, obtained with the FLAMES multi-integral field unit system on the Very Large Telescope (VLT) of the European Southern Observatory. Previous integrated spectroscopy of all these galaxies by Couch & Sharples…
A Chandra observation of the X-ray environment and jet of 3C 296
Hardcastle, M. J.; Birkinshaw, M.; Worrall, D. M. +2 more
We have observed the twin-jet radio galaxy 3C 296 with Chandra. X-ray emission is detected from the nucleus, from the inner parts of the radio jet and from a small-scale thermal environment around the jet deceleration region. As we have found in previous observations of other twin-jet radio galaxies, the X-ray jet and a steep pressure gradient in …
Submillimetre detection of a high-redshift type 2 QSO
Dunlop, J. S.; Rigopoulou, D.; Tozzi, P. +6 more
We report on the first SCUBA detection of a type 2 QSO at z= 3.660 in the Chandra Deep Field South. This source is X-ray-absorbed, shows only narrow emission lines in the optical spectrum and is detected in the submillimetre: it is the ideal candidate in an evolution scheme for active galactic nuclei (AGN) (e.g. Fabian 1999; Page et al. 2004) of a…
Polycyclic aromatic hydrocarbon emission bands in selected planetary nebulae: a study of the behaviour with gas phase C/O ratio
Barlow, M. J.; Cohen, Martin
Airborne and space-based low-resolution spectroscopy in the 1980s discovered tantalizing quantitative relationships between the gas phase C/O abundance ratio in planetary nebulae (PNe) and the fractions of total far-infrared (FIR) luminosity radiated by the 7.7- and 11.3-µm bands (the C = C stretch and C-H bend, respectively), of polycyclic …
The XMM-Newton Needles in the Haystack Survey: the local X-ray luminosity function of `normal' galaxies
Georgakakis, A.; Georgantopoulos, I.; Koulouridis, E.
In this paper we estimate the local (z < 0.22) X-ray luminosity function of `normal' galaxies derived from the XMM-Newton Needles in the Haystack Survey. This is an on-going project that aims to identify X-ray-selected normal galaxies (i.e. non-AGN dominated) in the local Universe. We are using a total of 70 XMM-Newton fields covering an area o…
X-ray bright optically inactive galaxies in XMM-Newton/Sloan Digital Sky Survey fields: more diluted than absorbed?
Georgakakis, A.; Georgantopoulos, I.
We explore the properties of X-ray bright optically inactive galaxies (XBONGs) detected in the 0.5-8 keV spectral band in 20 public XMM-Newton fields overlapping with the Sloan Digital Sky Survey (SDSS). We constrain our sample to optically extended systems with logfX/fopt > -2 that have spectroscopic identifications avail…
The evolution of Ks-selected galaxies in the GOODS/CDFS deep ISAAC field
McLure, R. J.; Dunlop, J. S.; Caputi, K. I. +1 more
We present estimated redshifts and derived properties of a sample of 1663 galaxies with Ks<= 22 (Vega), selected from 50.4 arcmin2 of the Great Observatories Origins Deep Survey/Chandra Deep Field South (GOODS/CDFS) field with deep Infrared Spectrometer and Array Camera (ISAAC) imaging, and make an extensive comparison of …