Search Publications
UIR bands in the ISO SWS spectrum of the carbon star TU Tauri
Hony, S.; Tielens, A. G. G. M.; Boersma, C.
Polycyclic Aromatic Hydrocarbon (PAH) molecules are thought to form in the ejecta of carbon-rich Asymptotic Giant Branch (AGB) stars. Fifty ISO SWS spectra of warm carbon-rich AGB stars have been investigated for the Unidentified IR (UIR) emission due to fluorescence by PAH molecules. In this sample the binary star TU Tau, which has a blue compani…
Evidence for colliding winds in WR 25 from XMM-Newton observations of X-ray variability
Corcoran, M. F.; Pollock, A. M. T.
The Wolf-Rayet star WR 25 in the Carina Nebula is a surprisingly bright X-ray source, and amongst the brightest WR stars in X-rays. It is a suspected binary star, though its binary nature has been a matter of controversy. We report here observations of WR 25 from the XMM-Newton archive which showed an increase in X-ray luminosity of more than a fa…
Exploring the lower mass function in the young open cluster IC 4665
James, D. J.; Testi, L.; Palla, F. +8 more
We present a study of the young (30-100 Myr) open cluster IC 4665 with the aim to determine the shape of the mass function well into the brown dwarf regime. We photometrically select 691 low-mass stellar and 94 brown dwarf candidate members over an area of 3.82 square degrees centred on the cluster. K-band follow-up photometry and Two-Micron All-S…
INTEGRAL and RXTE monitoring of GRS 1758-258 in 2003 and 2004. A transition from the dim soft state to the hard state
Pottschmidt, K.; Zdziarski, A. A.; Lubiński, P. +3 more
The Galactic Center black hole candidate (BHC)
The ratio of N(C18O) and AV in Chamaeleon I and III-B. Using 2MASS and SEST
Kainulainen, J.; Harju, J.; Lehtinen, K.
We investigate the relationship between the C18O column density and the visual extinction in
First albedo determination of 2867 Steins, target of the Rosetta mission
Barbieri, C.; Barucci, M. A.; Fornasier, S. +2 more
Aims. We present the first albedo determination of 2867 Steins, the asteroid target of the Rosetta space mission together with 21 Lutetia.Methods.The data were obtained in polarimetric mode at the ESO-VLT telescope with the FORS1 instrument in the V and R filters. Observations were carried out from June to August 2005 covering the phase angle rang…
A self-consistent model of isolated neutron stars: the case of the X-ray pulsar RX J0720.4-3125
Miniutti, G.; Pons, J. A.; Pérez-Azorín, J. F. +1 more
Context: .We present a unified explanation for the observed properties of the isolated neutron star RX J0720.4-3125 by obtaining a self-consistent model that accounts simultaneously for the observed X-ray spectrum and optical excess, the pulsed fraction, the observed spectral feature around 0.3 keV, and the long-term spectral evolution.
Aims: …
X-rays from HH 210 in the Orion nebula
Grosso, N.; Kastner, J. H.; Bally, J. +3 more
We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH 210. HH 210 is located at the tip of the NNE finger of the emission line system bursting out of the BN-KL complex, northwest of the Trapezium cluster in the OMC-1 molecular cloud. Using …
INTEGRAL observations of the Crab pulsar
Cusumano, G.; Foschini, L.; Di Cocco, G. +5 more
Aims.The paper presents the timing and spectral analysis of several observations of the
Methods: .All these observations, when summed together provide a high statistics data set which can be used for accurate phase resolved spectroscopy. A detailed study of …
X-ray emission from the blazar AO 0235+16 : the XMM-Newton and Chandra point of view
Villata, M.; Orio, M.; Raiteri, C. M. +4 more
We analyse five observations of the BL Lac object