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Some wave features found in the C-ring of Saturn appear to be excited by resonances with normal mode oscillations of the planet. The waves are found at locations in the rings where the ratio of orbital to oscillation frequencies is given by…

Earth and Planetary Astrophysics · Physics 2015-06-18 Mark S. Marley

The spatial distribution and polarization of Saturn narrowband (NB) emissions have been studied by using Cassini Radio and Plasma Wave Sciences data and goniopolarimetric data obtained through an inversion algorithm with a preset source…

Using the Advanced CCD Imaging Spectrometer (ACIS), the Chandra X-ray Observatory (CXO) observed the Saturnian system for one rotation of the planet (~37 ks) on 20 January, 2004, and again on 26-27 January, 2004. In this letter we report…

Non-invasive surface wave methods have become a popular alternative to traditional invasive forms of site-characterization for inferring a site's subsurface shear wave velocity (Vs) structure. The advantage of surface wave methods over…

Geophysics · Physics 2021-04-06 Joseph P. Vantassel , Brady R. Cox

The reconstruction of galaxy cluster's gas density profiles is usually performed by assuming spherical symmetry and averaging the observed X-ray emission in circular annuli. In the case of a very inhomogeneous and asymmetric gas…

Cosmology and Nongalactic Astrophysics · Physics 2017-03-15 D. Eckert , M. Roncarelli , S. Ettori , S. Molendi , F. Vazza , F. Gastaldello , M. Rossetti

At the solar equinox in August 2009, the Composite Infrared Spectrometer (CIRS) onboard Cassini showed the lowest Saturn's ring temperatures ever observed. Detailed radiative transfer models show that the observed equinox temperatures of…

Earth and Planetary Astrophysics · Physics 2015-09-01 Ryuji Morishima , Linda Spilker , Shawn Brooks , Estelle Deau , Stu Pilorz

We construct Saturn equatorial neutral temperature and density profiles of H, H$_2$, He, and CH$_4$, between 10$^{-12}$ and 1 bar using measurements from Cassini's Ion Neutral Mass Spectrometer (INMS) taken during the spacecraft's final…

Earth and Planetary Astrophysics · Physics 2021-11-03 J. M. Chadney , T. T. Koskinen , X. Hu , M. Galand , P. Lavvas , Y. C. Unruh , J. Serigano , S. M. Hörst , R. V. Yelle

We present very deep CCD spectrum of the bright, medium-excitation planetary nebula NGC 7009, with a wavelength coverage from 3040 to 11000 A. Traditional emission line identification is carried out to identify all the emission features in…

Solar and Stellar Astrophysics · Physics 2015-05-27 X. Fang , X. -W. Liu

We have developed a new method for determining the corotation radii of density waves in disk galaxies, which makes use of the radial distribution of an azimuthal phase shift between the potential and density wave patterns. The approach…

Astrophysics · Physics 2008-11-26 Xiaolei Zhang , Ronald J. Buta

We use a simple model of the dynamics of a narrow-eccentric ring, to put some constraints on some of the observable properties of the real systems.In this work we concentrate on the case of the `Titan ringlet of Saturn'.Our approach is…

Astrophysics · Physics 2009-11-10 M. D. Melita , J. C. B. Papaloizou

Albedo, spectral slopes, and water ice band depths maps for the five midsized saturnian satellites Mimas, Enceladus, Tethys, Dione, and Rhea have been derived from Cassini-Visual and Infrared Mapping Spectrometer (VIMS) data. The maps are…

Earth and Planetary Astrophysics · Physics 2022-01-19 G. Filacchione , M. Ciarniello , E. D'Aversa , F. Capaccioni , R. N. Clark , B. J. Buratti , P. Helfenstein , K. Stephan , C. Plainaki

The spectral position of the 3.6 micron continuum peak measured on Cassini-VIMS I/F spectra is used as a marker to infer the temperature of the regolith particles covering the surfaces of Saturn's icy satellites. This feature is…

We present the results of two-dimensional numerical simulations of stellar galactic disks, aimed at studying the non-linear coupling between bar and spiral waves and modes, in disks with realistically peaked rotation profiles. The power…

Astrophysics · Physics 2011-05-23 F. Masset , M. Tagger

The paper deals with the investigation of the Mars subsurface by means of data collected by the Mars Advanced Radar for Subsurface and Ionosphere Sounding working at few MHz frequencies. A data processing strategy, which combines a simple…

Earth and Planetary Astrophysics · Physics 2016-09-28 S. E. Lauro , G. Gennarelli , E. Pettinelli , F. Soldovieri , F. Cantini , A. P. Rossi , R. Orosei

We present the SINS survey with SINFONI of high redshift galaxies. With 80 objects observed and 63 detected, SINS is the largest survey of spatially resolved gas kinematics, morphologies, and physical properties of star-forming galaxies at…

We report the first unambiguous detection of X-ray emission originating from Saturn with a Chandra observation, duration 65.5 ksec with ACIS-S3. Beyond the pure detection we analyze the spatial distribution of X-rays on the planetary…

Astrophysics · Physics 2009-11-10 J. -U. Ness , J. H. M. M. Schmitt , S. J. Wolk , K. Dennerl , V. Burwitz

CONTEXT: Thermal emission from extrasolar planets makes it possible to study important physical processes in their atmospheres and derive more precise orbital elements. AIMS: By using new near infrared and optical data, we examine how these…

Earth and Planetary Astrophysics · Physics 2022-08-10 G. Kovacs , I. Dekany , B. Karamiqucham , G. Chen , G. Zhou , M. Rabus , T. Kovacs

The EnVision and VERITAS missions to Venus will fly with X and Ka band telecommunications channels which can be used to conduct radio occultation studies of Venus' atmosphere. While link attenuation measurements during prior S and X band…

We present an analysis of data about Saturn's atmosphere from Cassini's Visual and Infrared Mapping Spectrometer (VIMS), focusing on the meteorology of the features seen in the 5-micron spectral window. We present VIMS mosaics and discuss…

Earth and Planetary Astrophysics · Physics 2013-01-28 David S. Choi , Adam P. Showman , Robert H. Brown

Many small moonlets, creating propeller structures, have been found in Saturn's rings by the Cassini spacecraft. We study the dynamical evolution of such 20-50m sized bodies which are embedded in Saturn's rings. We estimate the importance…

Earth and Planetary Astrophysics · Physics 2010-11-23 Hanno Rein , John C. B. Papaloizou