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Isotopic Ratios in Titan's Atmosphere from Cassini CIRS Limb Sounding: HC3N in the North
Irwin, P. G. J.; Teanby, N. A.; Flasar, F. M. +8 more
This Letter reports the first detection of the three 13C isotopologues of HC3N on Titan, from Cassini Composite Infrared Spectrometer (CIRS) infrared spectra. The data are limb spectra taken at latitudes N54°-N69° in 2006 and 2007 when HC3N was enhanced in the north. Using a new line list for the ν5 band…
The Venusian induced magnetosphere: A case study of plasma and magnetic field measurements on the Venus Express mission
Coates, A. J.; Kallio, E.; Fedorov, A. +49 more
Plasma and magnetic field measurements made onboard the Venus Express on June 1, 2006, are analyzed and compared with predictions of a global model. It is shown that in the orbit studied, the plasma and magnetic field observations obtained near the North Pole under solar minimum conditions were qualitatively and, in many cases also, quantitatively…
Observational consequences of the recently proposed Super-Earth orbiting GJ 436
Bean, J. L.; Seifahrt, A.
Ribas and collaborators have recently proposed that an additional, ~5 M⊕ planet orbits the transiting planet host star GJ 436. Long-term dynamical interactions between the two planets leading to eccentricity excitation might provide an explanation for the transiting planet's unexpectedly large orbital eccentricity. We examine whether th…
Seismic Emissions from a Highly Impulsive M6.7 Solar Flare
Moradi, H.; Donea, A. -C.; Martínez-Oliveros, J. C.
On 10 March 2001 the active region NOAA 9368 produced an unusually impulsive solar flare in close proximity to the solar limb. This flare has previously been studied in great detail, with observations classifying it as a type 1 white-light flare with a very hard spectrum in hard X-rays. The flare was also associated with a type II radio burst and …
Access of solar wind electrons into the Martian magnetosphere
Barabash, S.; Lundin, R.; Winningham, J. D. +7 more
Electrons with energy of ~40 80 eV measured by the instrument ASPERA-3 on Mars Express and MAG-ER onboard Mars Global Surveyor are used to trace an access of solar wind electrons into the Martian magnetosphere. Crustal magnetic fields create an additional protection from solar wind plasma on the dayside of the Southern Hemisphere by shifting the b…
New absolute magnitude calibrations for detached binaries
Demircan, O.; Eker, Z.; Soydugan, F. +6 more
Lutz-Kelker bias corrected absolute magnitude calibrations for the detached binary systems with main-sequence components are presented. The absolute magnitudes of the calibrator stars were derived at intrinsic colours of Johnson-Cousins and 2MASS (Two Micron All Sky Survey) photometric systems. As for the calibrator stars, 44 detached binaries wer…
Low-Frequency Lyα Power Spectra Observed by UVCS in a Polar Coronal Hole
Bemporad, A.; Poletto, G.; Matthaeus, W. H.
The occurrence of f-1 noise in interplanetary magnetic fields (in the 1 × 10-5 to 1 × 10-4 Hz band) and other plasma parameters has now been known for about 20 years and has been recently identified also in the photospheric magnetic fields. However, the relationship between interplanetary and solar fluctuation spec…
On the cause of Saturn's plasma periodicity
André, N.; Coates, A. J.; Dougherty, M. K. +6 more
Periodic plasma enhancements are examined for all Cassini orbits from December 29, 2005 through September 7, 2006. The events, which have UT durations of 3-4 hours, are centered near SLS3 longitude 10° at radial distances near 15 RS and at larger W longitudes at larger distances, reaching 180°W by 49 RS. Magnetic-field data w…
Deep Advanced Camera for Surveys Imaging in the Globular Cluster NGC 6397: Dynamical Models
Anderson, Jay; Dotter, Aaron; Rich, R. Michael +8 more
We present N-body models to complement deep imaging of the metal-poor core-collapsed cluster NGC 6397 obtained with the Hubble Space Telescope. All simulations include stellar and binary evolution in step with the stellar dynamics and account for the tidal field of the Galaxy. We focus on the results of a simulation that began with 100, 000 object…
Analysis of the Fe X and Fe XIV line width in the solar corona using LASCO-C1 spectral data
Schwenn, R.; Mierla, M.; Teriaca, L. +2 more
Aims:The purpose of this paper is to analyze the variation in the line width with height in the inner corona (region above 1.1 R⊙), by using the spectral data from LASCO-C1 aboard SOHO. We used data acquired at activity minimum (August-October 1996) and during the ascending phase of the solar cycle (March 1998).
Methods: Series of i…