Search Publications
H1320+551: a type 1.8/1.9 Seyfert galaxy with an unabsorbed X-ray spectrum
Barcons, X.; Carrera, F. J.; Ceballos, M. T.
We present new optical spectroscopic and XMM-Newton X-ray observations of the active galactic nucleus (AGN) H1320+551. The optical data (consistent with but of better quality than a previously published spectrum) show this source to be a type 1.8/1.9 Seyfert galaxy at z= 0.0653. The narrow-line region is significantly reddened, with a Balmer decre…
XMM-Newton RGS spectroscopy of LMC X-3
Page, M. J.; Soria, R.; Mason, K. O. +3 more
We present soft X-ray spectroscopy of the black hole binary LMC X-3 from the XMM-Newton Reflection Grating Spectrometer. The observations span the full range of spectral states seen in LMC X-3. The spectra are completely dominated by continuum emission, and the neutral absorbing column measured from the OI edge (NH= 3.8+0.8
The identification of HCN and HNC in carbon stars: model atmospheres, synthetic spectra and fits to observations in the 2.7-4.0 µm region
Jones, H. R. A.; Tennyson, J.; Pavlenko, Ya. V. +1 more
Model carbon star atmospheres and synthetic spectra have been calculated using the recent HCN/HNC vibration rotation line list of Harris et al. The calculations are repeated using only HCN lines and show that HNC has a significant effect upon the temperature, density and optical depth of a stellar atmosphere.
We fit synthetic spectra in the 2…Three-component Stäckel potentials satisfying recent estimates of Milky Way parameters
Famaey, B.; Dejonghe, H.
We present a set of three-component Stäckel potentials defined by five parameters and designed to model the Milky Way. We review the fundamental constraints that any model of the Milky Way must satisfy, including the most recent ones derived from Hipparcos data, and we study how the parameters of the presented potentials can vary in order to match…
The Phoenix Deep Survey: X-ray properties of faint radio sources
Georgakakis, A.; Sullivan, M.; Georgantopoulos, I. +4 more
In this paper, we use a 50-ks XMM-Newton pointing overlapping with the Phoenix Deep Survey, a homogeneous radio survey reaching µJy sensitivities, to explore the X-ray properties and the evolution of star-forming galaxies. Multiwavelength ultraviolet, optical and near-infrared photometric data are available for this field and are used to est…
XMM-Newton X-ray observations of the Carina nebula
Méndez, M.; Morrell, N. I.; Albacete Colombo, J. F.
We use new XMM-Newton observations to perform a detailed X-ray analysis of the Carina nebula region in the 0.3-12 keV energy range. Our source detection yields 80 discrete X-ray sources, from which about 20 per cent seem not to have optical counterparts. To get an idea of the energy spectrum of these sources, we construct an X-ray colour-colour di…
On the formation of star clusters in the merger NGC 6240
Gallagher, J. S.; de Grijs, R.; Pasquali, A.
We identified star clusters in archived Hubble Space Telescope/Wide Field Planetary Camera 2 (HST/WFPC2) images of the merger and ultraluminous infrared galaxy NGC 6240, with the aim of investigating whether star cluster properties (luminosity, age and mass) in such an extreme environment differ from those of clusters in less luminous starburst ga…
The X-ray eclipse of OY Car resolved with XMM-Newton: X-ray emission from the polar regions of the white dwarf
Wheatley, Peter J.; West, Richard G.
We present the XMM-Newton X-ray eclipse light curve of the dwarf nova OY Car. The eclipse ingress and egress are well resolved for the first time in any dwarf nova placing strong constraints on the size and the location of the X-ray emitting region. We find good fits to a simple linear eclipse model, giving ingress/egress durations of 30 +/- 3 s (…
Galactic archaeology: initial mass function and depletion in the `thin disc'
Schröder, K. -P.; Pagel, B. E. J.
We determine the initial mass function (IMF) of the `thin disc' in the range of, approximately, 1.1 to 4 Msolar by means of a direct comparison between synthetic stellar samples [for different matching choices of IMF, star formation rate (SFR) and depletion] and a complete (volume-limited) sample of single stars near the Galactic plane …
XMM-Newton observations of two hyperluminous IRAS galaxies: Compton-thick quasars with obscuring starbursts
Fabian, A. C.; Crawford, C. S.; Wilman, R. J. +1 more
We present XMM-Newton observations of two hyperluminous IRAS galaxies (LBol > 1013h-250 Lsolar), neither of which were previously detected by ROSAT. Published models of the infrared spectral energy distributions imply that a starburst and obscured quasar contribute equally to the power of e…