Search Publications
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
Association of Pi2 pulsations and pulsed reconnection: ground and Cluster observations in the tail lobe at 16 RE
Dandouras, I.; Lucek, E.; Hasegawa, H. +8 more
Simultaneous measurements from the Cluster spacecraft and several ground stations (SAMNET, IMAGE, Kakioka, Hermanus) provide evidence for an association of Pi2 pulsations and pulsed reconnection in the magnetotail. On 8 September 2002, substorm-related Pi2 pulsations were recorded with the same waveform (same frequency) in the tail lobe at 16 R
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: …
Drivers of the solar wind: then and now
Hollweg, Joseph V.
Observation of Small-Scale Structure Using Sextupole Lensing
Irwin, John; Shmakova, Marina
Gravitational lensing by foreground halos with masses as small as 1010 Msolar can induce observable second-order shape distortions in background galaxy images in addition to the well-known elliptical shape distortion produced by first-order shear. Furthermore, the orientation of the second-order distortions is correlated with…
Variability Study of Seyfert 2 Galaxies with XMM-Newton
Awaki, Hisamitsu; Leighly, Karen M.; Murakami, Hirokatsu +1 more
We present the results of timing analysis of XMM-Newton observations of Seyfert 2 galaxies in order to search for differences in the mean properties of Seyfert 1 galaxies and Seyfert 2 galaxies. We selected 13 Seyfert 2 galaxies from the XMM-Newton archive that have hard X-ray components in their spectra and calculated the excess variance (σ2…
X-ray reflection in the nearby Seyfert 2 galaxy NGC 1068
Vaughan, Simon; Pounds, Ken
We use the full broad-band XMM-Newton European Photon Imaging Camera (EPIC) data to examine the X-ray spectrum of the nearby Seyfert 2 galaxy NGC 1068, previously shown to be complex with the X-ray continuum being a sum of components reflected/scattered from cold (neutral) and warm (ionized) matter, together with associated emission-line spectra. …
On-ground characterization of Rosetta/VIRTIS-M. II. Spatial and radiometric calibrations
Piccioni, G.; Capaccioni, F.; Coradini, A. +5 more
After having considered the spectral and geometrical performances of the Rosetta/VIRTIS-M experiment, we complete here the analysis by evaluating quantitatively the flat-field and radiometric responses. The purpose of this work is to retrieve the flat-field matrix necessary to homogenize the focal plane response. Moreover, the most important resul…
The 2003 October-November Fast Halo Coronal Mass Ejections and the Large-Scale Magnetic Field Structures
Liu, Y.; Hayashi, K.
The coronal magnetic field, computed from synoptic maps of the magnetic field and a potential field source surface (PFSS) model, reveals special configurations related to the active regions that were associated with most, if not all, fast halo coronal mass ejections (CMEs) in 2003 October-November. It was shown that these active regions emerged in…