Search Publications
W Hya through the eye of Odin. Satellite observations of circumstellar submillimetre H2O line emission
Olofsson, H.; Justtanont, K.; Larsson, B. +10 more
We present Odin observations of the AGB star W Hya in the ground-state transition of ortho-H{2}O, 1{10}-101, at 557 GHz. The line is clearly of circumstellar origin. Radiative transfer modelling of the water lines observed by Odin and ISO results in a mass-loss rate of (2.5±0.5)×10-7 M⊙ yr-1, and a circu…
To see or not to see a bow shock. Identifying bow shocks with Hα allsky surveys
Brown, D.; Bomans, D. J.
OB-stars have the highest luminosities and strongest stellar winds of all stars, which enables them to interact strongly with their surrounding ISM, thus creating bow shocks. These offer us an ideal opportunity to learn more about the ISM. They were first detected and analysed around runaway OB-stars using the IRAS allsky survey by van Buren et al…
The broad-band X-ray spectrum of the blazar PKS B1830-211 by Chandra and INTEGRAL
Piro, L.; de Rosa, A.; Tramacere, A. +6 more
In this paper we present a broad-band study of the X-ray emission of the blazar PKS 1830-211 based on Chandra and INTEGRAL observations. Notwithstanding the high redshift (z=2.507), it is a bright X-ray source (F(2-10 keV) ≃ 10-11 erg cm-2 s-1), due to gravitational lensing by an intervening galaxy at z=0.89. Previ…
A dichotomy in the orientation of dust and radio jets in nearby low-power radio galaxies
de Zeeuw, P. T.; Verdoes Kleijn, G. A.
We examine the properties of central dust in nearby quiescent and active early-type galaxies. The active galaxies are low-power radio galaxies with Fanaroff & Riley type I or I/II radio jets. We focus on (a) the comparison of the dust distributions in the active and quiescent galaxy samples; and (b) the relation between the radio jet and dust …
INTEGRAL observations of six AGN in the Galactic Plane
de Rosa, A.; Fabian, A. C.; Walter, R. +7 more
We present results on approximately one year of INTEGRAL observations of six AGN detected during the regular scans of the Galactic Plane. The sample is composed by five Seyfert 2 objects (MCG 05 23 16, NGC 4945, the Circinus galaxy, NGC 6300, ESO 103 G35) and the radio galaxy Centaurus A. The continuum emission of each of these sources is well rep…
Multispacecraft observations of the hard X-ray emission from the giant solar flare on 2003 November 4
Hurley, K.; Kane, S. R.; McTiernan, J. M.
The hard X-ray emission from the “giant” solar flare on 4 November 2003 ( 1947 UT) was observed by the hard X-ray/gamma ray spectrometer on the Ulysses spacecraft located at 114 degrees west of the Sun-Earth line at a distance of 5.28 AU from the Sun. A “small” hard X-ray burst during the early rise of the giant flare and a part of the decay of th…
Imaging Saturn's rings with CAMIRAS: thermal inertia of B and C rings
Pantin, E.; Lagage, P. O.; Ferrari, C. +2 more
Thermal inertias Γ of Saturn's B and C ring particles have been derived from infrared observations using the CAMIRAS camera mounted on the Canada-France-Hawaii Telescope. They are respectively Γ_B=5+18-2 {J m-2 K-1 s-1/2} and Γ_C=6+12-4 {J m-2 K-1 s<…
Dissecting the spiral galaxy M 83: mid-infrared emission and comparison with other tracers of star formation
Madden, S. C.; Sauvage, M.; Ehle, M. +4 more
We present a detailed mid-infrared study of the nearby, face-on spiral galaxy M 83 based on ISOCAM data. M 83 is a unique case study, since a wide variety of MIR broad-band filters as well as spectra, covering the wavelength range of 4 to 18 µm, were observed and are presented here. Emission maxima trace the nuclear and bulge area, star-form…
Far-infrared detection of methylene
Menten, K. M.; Baluteau, J. -P.; Polehampton, E. T. +2 more
We present a clear detection of CH2 in absorption towards the molecular cloud complexes
Global characteristics of the first IBIS/ISGRI catalogue sources: unveiling a murky episode of binary star evolution
Hill, A. B.; Walter, R.; Bird, A. J. +10 more
INTEGRAL is the first gamma-ray astronomy mission with a sufficient sensitivity and angular resolution combination appropriate to the detection and identification of considerable numbers of gamma-ray emitting sources. The large field of view (~30° zero response FWHM) enables INTEGRAL to survey the galactic plane on a regular (~weekly) basis as par…