Search Publications
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
Observation of a bright coronal downflow by SOHO/EIT
Solanki, S. K.; Schwenn, R.; Mierla, M. +3 more
A distinct coronal downflow has been discovered in the course of a prominence eruption associated coronal mass ejection (CME) imaged by EIT (Extreme ultraviolet Imaging Telescope) and LASCO (Large Angle Spectrometric Coronagraph) on board SOHO (Solar and Heliospheric Observatory) on 5-Mar.-2000. Evolution of the prominences seen by EIT was tracked…
Tests of stellar model atmospheres by optical interferometry. IV. VINCI interferometry and UVES spectroscopy of Menkar
Wolff, B.; Driebe, T.; Wittkowski, M. +3 more
Aims.We present coordinated near-infrared K-band interferometric and optical spectroscopic observations of the M 1.5 giant
The X-ray binary 2S0114+650=LSI+65 010. A slow pulsar or tidally-induced pulsations?
Koenigsberger, G.; Canalizo, G.; Richer, M. G. +4 more
Context: .The X-ray source 2S0114+650=LSI+65 010 is a binary system containing a B-type primary and a low mass companion believed to be a neutron star. The system has three reported periodicities: the orbital period, P_orb∼11.6 days, X-ray flaring with P_flare∼2.7 h and a "superorbital" X-ray periodicity P_super=30.7 days.
Aims: .The objective…
A historic jet-emission minimum reveals hidden spectral features in 3C 273
Lähteenmäki, A.; Foellmi, C.; O'Brien, P. T. +14 more
Aims. The aim of this work is to identify and study spectral features in the quasar 3C 273 usually blended by its strong jet emission.
Methods: . A historic minimum in the sub-millimetre emission of 3C 273 triggered coordinated multi-wavelength observations in June 2004. X-ray observations from the INTEGRAL, XMM-Newton and RXTE satellites are…
New southern blue compact dwarf galaxies in the 2dF Galaxy redshift survey
Thuan, T. X.; Izotov, Y. I.; Papaderos, P. +3 more
Aims.Aiming to find new extremely metal-deficient star-forming galaxies we extracted from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) 100 K Data Release 14 emission-line galaxies with relatively strong [O iii] λ4363 emission.
Methods: .Spectroscopic and photometric studies of this sample and, in addition, of 7 Tololo and 2 UM galaxies…