Search Publications
The ultra-compact binary 4U 1850-087 observed with INTEGRAL: hard X-ray emission from an X-ray burster
Mereghetti, S.; Sidoli, L.; Bazzano, A. +1 more
Context: .The X-ray burster 4U 1850-087, located in the Galactic globular cluster NGC 6712, is an ultracompact binary (orbital period ~21 min), likely harbouring a degenerate companion.
Aims: .The source has been observed at soft γ-rays several times with the INTEGRAL satellite, during the monitoring of the Galactic plane, with an unprecedente…
New Corroborative Evidence for the Overdensity of Galaxies around the Radio-Loud Quasar SDSS J0836+0054 at z = 5.8
Nagao, Tohru; Taniguchi, Yoshiaki; Ajiki, Masaru +8 more
Recently, Zheng et al. (2006) found evidence for an overdensity of galaxies around a radio-loud quasar, SDSS J0836+0054, at z = 5.8 (a 5 arcmin² field). We examined our deep optical imaging data (B, V, r', i', z', and NB816) taken with the Suprime-Cam on the Subaru Telescope. The NB816 narrow-band filter (λc = 815 and Δλ = 12nm) is suit…
Nonequilibrium radiative heat flux modeling for the Huygens entry probe
Magin, T. E.; Caillault, L.; Bourdon, A. +1 more
An electronic collisional-radiative model is proposed to predict the nonequilibrium populations and the radiation of the excited electronic states CN(A, B) and N2(A, B, C) during the entry of the Huygens probe into the atmosphere of Titan. The model is loosely coupled with flow solvers using a Lagrangian method. First, the model was tes…
Asymmetries in Mars' Exosphere. Implications for X-ray and ENA Imaging
Holmström, Mats
Observations and simulations show that Mars' atmosphere has large seasonal variations. Total atmospheric density can have an order of magnitude latitudinal variation at exobase heights. By numerical simulations we show that these latitude variations in exobase parameters induce asymmetries in the hydrogen exosphere that propagate to large distance…
Morphology of Spitzer 24 µm Detected Galaxies in the UDF: The Links between Star Formation and Galaxy Morphology
Le Floc'h, E.; Papovich, C.; Rieke, G. H. +2 more
We have studied the morphologies of infrared-luminous galaxies at 0.3<=z<1.4 in the HST Ultra Deep Field (UDF) by calculating concentration and asymmetry indices and comparing the results with similar calculations for: (1) galaxies at similar redshift that are less infrared-active, and (2) local luminous infrared galaxies [LIRGs; LIR
Mapping of the icy Saturnian satellites: First results from Cassini-ISS
Scholten, F.; Matz, K. -D.; Neukum, G. +7 more
Images of the icy Saturnian satellites Mimas, Enceladus, Tethys, Dione, Rhea, Iapetus, and Phoebe, derived by the Voyager and Cassini cameras are used to produce new local high-resolution image mosaics as well as global mosaics [ http://ciclops.org, http://photojournal.jpl.nasa.gov]. These global mosaics are valuable both for scientific interpreta…
Slow halo CMEs with shock signatures
Pohjolainen, S.; Lehtinen, N. J.
Context: .In the solar corona, shocks are formed when the speed of a disturbance exceeds the local magnetosonic speed. In the active region corona the Alfvén speed can drop to a few hundred km s-1, but globally it is much higher. There has been a long debate on whether the shocks responsible for type II bursts are created by bow shocks …
GRB 030406 - an extremely hard burst outside of the INTEGRAL field of view
Goldoni, P.; Rau, A.; Bulik, T. +3 more
Using the IBIS Compton mode, the INTEGRAL satellite is able to detect and localize bright and hard GRBs, which happen outside of the nominal INTEGRAL field of view. We have developed a method of analyzing such INTEGRAL data to obtain the burst location and spectra. We present the results for the case of
An Infrared Imaging Study of the Bipolar Proto-Planetary Nebula IRAS 16594-4656
Volk, Kevin; Kwok, Sun; Hrivnak, Bruce J. +1 more
High-resolution mid-infrared images have been obtained in N and Q band for the proto-planetary nebula IRAS 16594-4656. A bright equatorial torus and a pair of bipolar lobes can clearly be seen in the infrared images. The torus appears thinner at the center than at the edges, suggesting that it is viewed nearly edge-on. The infrared lobes correspon…
Substorm topology in the ionosphere and magnetosphere during a flux rope event in the magnetotail
Balogh, A.; Nakamura, R.; Rème, H. +4 more
On 13 August 2002, at ~23:00 UT, about 10 min after a substorm intensification, Cluster observes a flux rope in the central magnetotail, followed by a localised fast flow event about oneminute later. Associated with the flux rope event, a traveling compression region (TCR) is seen by those Cluster spacecraft which reside in the lobe. In the conjug…