Search Publications
The density of the upper martian atmosphere measured by Lyman-α absorption with Mars Express SPICAM
Forget, F.; Bertaux, J. -L.; Chaufray, J. -Y. +3 more
Absorption of interplanetary Lyman-α emission by Mars' nightside lower thermosphere was observed by Mars Express Spectrometer for Investigation of Characteristics of the Atmosphere of Mars (SPICAM), and is analyzed to derive the CO 2 density at 110 km during a martian year. The observed density seasonal variability is consistent with re…
Study of Eclipsing Binary and Multiple Systems in OB Associations. I. Orion OB1a - IM Monocerotis
Bilir, Selçuk; Bakis, Volkan; Bakis, Hicran +5 more
All available photometric and spectroscopic observations were collected and used as the basis of a detailed analysis of the close binary IM Mon. The orbital period of the binary was refined to 1d.19024249 (0.00000014). The Roche equipotentials, fractional luminosities (in Β,V, and Hp-bands) and fractional radii for the component stars i…
Cluster observations of a transient signature in the magnetotail: implications for the mode of reconnection
Dandouras, I.; Lucek, E.; Fazakerley, A. N. +5 more
Travelling compression regions (TCRs) are perturbations in the magnetotail lobe magnetic field caused by structures moving Earthward or tailward within the plasma sheet. Previous works have suggested that these structures are created by either time-dependant reconnection occurring at a single X-line, forming a flux-bulge-type structure, or space-v…
Comparative investigation of the terrestrial and Venusian magnetopause: Kinetic modeling and experimental observations by Cluster and Venus Express
Barabash, S.; Lundin, R.; Zhang, T. L. +4 more
In June 2006 Venus Express crossed several times the outer boundary of Venus induced magnetosphere, its magnetosheath and its bow shock. During the same interval the Cluster spacecraft surveyed the dawn flank of the terrestrial magnetosphere, intersected the Earth's magnetopause and spent long time intervals in the magnetosheath. This configuratio…
V456 Ophiuchi and V490 Cygni: Systems with the shortest apsidal-motion periods
Wolf, M.; Zasche, P.
Our main aim is the first detailed analysis of the two eclipsing binaries V456 Oph and V490 Cyg. The system V456 Oph has been studied both photometrically via an analysis of its light curve observed by the INTEGRAL/OMC and by the period analysis of all available times of minima. V490 Cyg has been studied by means of a period analysis only. Many ne…
Connection among spacecrafts and ground level observations of small solar transient events. An overview of small solar transient events observed at ground
Augusto, Carlos Roberto A.; Fauth, Anderson C.; Navia, Carlos E. +2 more
An overview of the results of the search for small solar transient events, in association with muon enhancements (deficits) registered at ground-level by the Tupi muon telescopes, is presented. Among the events, there are three interplanetary shocks and two solar flares of small scale whose X-ray emission flux is much smaller than 10 - 5
Layering and degradation of the Rupes Tenuis unit, Mars - a structural analysis south of Chasma Boreale
Neukum, G.; Van Gasselt, S.; Kneissl, T. +2 more
Models of the compact jet in GRS 1915+105
Punsly, Brian
In this article, models are constructed of the compact jet in GRS 1915+105 during an epoch of optimal data capture. On 2003 April 2, the object was observed in the hard X-ray/soft gamma-ray band (INTEGRAL), hard X-ray band (RXTE), near-IR (ESO/New Technology Telescope) and the Very Long Baseline Array (VLBA) (8.3 and 15 GHz). The source was in a s…
An Envelope Disrupted by a Quadrupolar Outflow in the Pre-planetary Nebula IRAS 19475+3119
Lee, Chin-Fei; Hsu, Ming-Chien
IRAS 19475+3119 is a quadrupolar pre-planetary nebula (PPN), with two bipolar lobes, one in the east-west (E-W) direction and one in the southeast-northwest (SE-NW) direction. We have observed it in CO J = 2-1 with the Submillimeter Array at ~1'' resolution. The E-W bipolar lobe is known to trace a bipolar outflow and it is detected at high veloci…
Is the Young Star Cluster NGC 376 Dissolving in the Field of the Small Magellanic Cloud?
Cignoni, M.; Tosi, M.; Sabbi, E. +3 more
We use deep images acquired with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope in the filters F555W and F814W to characterize the properties of NGC 376, a young star cluster located in the wing of the Small Magellanic Cloud. Using isochrone fitting we derive for NGC 376 an age of 28 ± 7 Myr, in good agreement with previ…