Search Publications
Missions
Journals
Publication Years
Orbits and Photometry of Pluto's Satellites: Charon, S/2005 P1, and S/2005 P2
Stern, S. Alan; Young, Leslie A.; Buie, Marc W. +2 more
We present new astrometry of Pluto's three satellites from images taken of the Pluto system during 2002-2003 with the High Resolution Camera mode of the Advanced Camera for Surveys instrument on the Hubble Space Telescope. The observations were designed to produce an albedo map of Pluto, but they also contain images of Charon and the two recently …
Mid-Infrared Spectroscopy of Carbon Stars in the Small Magellanic Cloud
Price, S. D.; Wood, P. R.; Matsuura, M. +3 more
We have observed a sample of 36 objects in the Small Magellanic Cloud (SMC) with the Infrared Spectrometer on the Spitzer Space Telescope. Nineteen of these sources are carbon stars. An examination of the near- and mid-infrared photometry shows that the carbon-rich and oxygen-rich dust sources follow two easily separated sequences. A comparison of…
Titan Radar Mapper observations from Cassini's T3 fly-by
Stiles, B.; Kelleher, K.; Callahan, P. +32 more
Cassini's Titan Radar Mapper imaged the surface of Saturn's moon Titan on its February 2005 fly-by (denoted T3), collecting high-resolution synthetic-aperture radar and larger-scale radiometry and scatterometry data. These data provide the first definitive identification of impact craters on the surface of Titan, networks of fluvial cha…
First observation of Mars with XMM-Newton. High resolution X-ray spectroscopy with RGS
Holmström, M.; Gunell, H.; Burwitz, V. +7 more
In the first observation of Mars with XMM-Newton, on 20-21 November 2003, this planet is clearly detected as an X-ray source. High resolution X-ray spectroscopy with the Reflection Grating Spectrometer (RGS) confirms that the X-ray radiation from Mars is composed of two different components: one due to fluorescent scattering of solar X-rays in its…
A FUSE Survey of High-Latitude Galactic Molecular Hydrogen
Wakker, B. P.
Measurements of molecular hydrogen (H2) column densities are presented for the first six rotational levels (J=0-5) for 73 extragalactic targets observed with the Far Ultraviolet Spectroscopic Explorer (FUSE). All of these have a final signal-to-noise ratio larger than 10 and are located at Galactic latitude |b|>20deg. The …
The broad-band spectrum of Cygnus X-1 measured by INTEGRAL
Goldoni, P.; Rodriguez, J.; Foschini, L. +9 more
The INTEGRAL satellite extensively observed the black hole binary Cygnus X-1 from 2002 November to 2004 November during calibration, open time and core program (Galactic Plane Scan) observations. These data provide evidence for significant spectral variations over the period. In the framework of the accreting black hole phenomenology, the source w…
Unveiling the nature of INTEGRAL objects through optical spectroscopy. III. Observations of seven southern sources
Palazzi, E.; Masetti, N.; Charles, P. A. +9 more
Context: . The detection, thanks to the INTEGRAL satellite, of a number of new hard X-ray sources calls for the identification of their nature by means of observations at longer wavelengths. Aims. In our continuing campaign to identify longer-wavelength counterparts of these newly-discovered hard X-ray sources detected by INTEGRAL, we observed the…
Self-gravity wakes in Saturn's A ring measured by stellar occultations from Cassini
Sremčević, M.; Colwell, J. E.; Esposito, L. W.
An azimuthal brightness asymmetry in Saturn's A ring is caused by ephemeral agglomerations that continually form under the mutual gravity of the ring particles only to be torn apart by Keplerian shear. We calculate the shape and spacing of the self-gravity wakes from Cassini stellar occultations. The wakes are highly flatttened structures, with he…
The vertical structure of Titan's upper atmosphere from Cassini Ion Neutral Mass Spectrometer measurements
Waite, J. H.; Kasprzak, W. T.; Müller-Wodarg, I. +4 more
Data acquired by the Ion Neutral Mass Spectrometer (INMS) on the Cassini spacecraft during its close encounter with Titan on 26 October 2004 reveal the structure of its upper atmosphere. Altitude profiles of N 2, CH 4, and H 2, inferred from INMS measurements, determine the temperature, vertical mixing rate, and es…
Discovery of Ultracompact Dwarf Galaxies in the Virgo Cluster
Drinkwater, M. J.; Jones, J. B.; Phillipps, S. +7 more
We have discovered nine ultracompact dwarf galaxies (UCDs) in the Virgo Cluster, extending samples of these objects outside the Fornax Cluster. Using the Two Degree Field (2dF) multifiber spectrograph on the Anglo-Australian Telescope, the new Virgo members were found among 1500 color-selected, starlike targets with 16.0<bj<20.2 i…