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We present an analysis of the VIMS solar occultations dataset, which allows us to extract vertically resolved information on the characteristics of Titan's atmosphere between 100-700 km with a characteristic vertical resolution of 10 km.…

Earth and Planetary Astrophysics · Physics 2014-11-21 L. Maltagliati , B. Bézard , S. Vinatier , M. M. Hedman , E. Lellouch , P. D. Nicholson , C. Sotin , R. J. de Kok , B. Sicardy

We present a reanalysis of visible/near-infrared (480-930 nm) observations of Neptune, made in 2018 with the MUSE instrument at the Very Large Telescope (VLT) in Narrow Field Adaptive Optics mode, reported by Irwin et al., Icarus, 311,…

Earth and Planetary Astrophysics · Physics 2021-01-20 P. G. J. Irwin , J. Dobinson , A. James , D. Toledo , N. A. Teanby , L. N. Fletcher , G. S. Orton , S. Pérez-Hoyos

A stellar occultation by Pluto was observed on 6 June 2020 with the 1.3-m and 3.6-m telescopes located at Devasthal, Nainital, India, using imaging systems in the I and H bands, respectively. From this event, we derive a surface pressure…

Aims: Disk-averaged infrared spectra of Neptune between 1.8 and 13 $\mu$m, obtained by the AKARI Infrared Camera (IRC) in May 2007, have been analysed to (a) determine the globally-averaged stratospheric temperature structure; (b) derive…

Earth and Planetary Astrophysics · Physics 2010-03-30 Leigh N. Fletcher , Pierre Drossart , Martin Burgdorf , Glenn Orton , Therese Encrenaz

We report on a variety of standard techniques used by New Horizons including a solar ultraviolet occultation, ultraviolet airglow observations, and high-phase look-back particulate search imaging to search for an atmosphere around Pluto's…

The exploration of the Pluto-Charon system by the New Horizons spacecraft represents the first opportunity to understand the distribution of albedo and other photometric properties of the surfaces of objects in the Solar System's "Third…

We report on high-resolution and spatially-resolved spectra of Io in the 4.0 {\mu}m region, recorded with the VLT/CRIRES instrument in 2008 and 2010, which provide the first detection of the {\nu}1 + {\nu}3 band of SO2 in Io's atmosphere.…

Earth and Planetary Astrophysics · Physics 2015-06-23 E. Lellouch , M. Ali-Dib , K. -L. Jessup , A. Smette , H. -U. Käufl , F. Marchis

Pluto's atmospheric profiles (temperature and pressure) have been studied for decades from stellar occultation lightcurves. In this paper, we look at recent Pluto Global Climate Model (GCM) results (3D temperature, pressure, and density…

Earth and Planetary Astrophysics · Physics 2021-02-10 Sihe Chen , Eliot F. Young , Leslie A. Young , Tanguy Bertrand , François Forget , Yuk L. Yung

We present ALMA and VLA spatial maps of the Uranian atmosphere taken between 2015 and 2018 at wavelengths from 1.3 mm to 10 cm, probing pressures from $\sim$1 to $\sim$50 bar at spatial resolutions from 0.1'' to 0.8''. Radiative transfer…

Earth and Planetary Astrophysics · Physics 2020-10-22 Edward M. Molter , Imke de Pater , Statia Luszcz-Cook , Joshua Tollefson , Robert J. Sault , Bryan Butler , David de Boer

Seasonal variation is significant in Titan's atmosphere due to the large change of solar insolation resulting from Titan's 26.7{\deg} axial tilt relative to the plane of Saturn's orbit. Here we present an investigation of hydrocarbon and…

Earth and Planetary Astrophysics · Physics 2022-04-18 Siteng Fan , Daniel Zhao , Cheng Li , Donald E. Shemansky , Mao-Chang Liang , Yuk L. Yung

Thermal observations of the Pluto-Charon system acquired by the Herschel Space Observatory in February 2012 are presented. They consist of photometric measurements with the PACS and SPIRE instruments (nine visits to the Pluto system each),…

Earth and Planetary Astrophysics · Physics 2016-03-23 E. Lellouch , P. Santos-Sanz , S. Fornasier , T. Lim , J. Stansberry , E. Vilenius , Cs. Kiss , T. Müller , G. Marton , S. Protopapa , P. Panuzzo , R. Moreno

We present a new description of the 7.7~$\mu$m region towards the high-mass star-forming region IRAS 23385+6053 taken from open James Webb Space Telescope Mid-Infrared Instrument Medium Resolution Spectrometer (JWST MIRI/MRS) data. This…

Astrophysics of Galaxies · Physics 2024-12-24 Ruslan Nakibov , Varvara Karteyeva , Igor Petrashkevich , Maksim Ozhiganov , Mikhail Medvedev , Anton Vasyunin

We searched for dust or debris rings in the Pluto-Charon system before, during, and after the New Horizons encounter. Methodologies included searching for back-scattered light during the approach to Pluto (phase $\sim15^\circ$), in situ…

This paper refines model predictions for the production of methane from UV-irradiated interplanetary dust particles (IDPs) now that the Rover Environmental Monitoring Station (REMS) instrument onboard the Mars Science Laboratory (MSL) Rover…

Earth and Planetary Astrophysics · Physics 2017-10-04 John E. Moores , Christina L. Smith , Andrew C. Schuerger

We investigate the effects of varying Saturn's orbit on the atmospheric circulation and surface methane distribution of Titan. Using a new general circulation model of Titan's atmosphere, we simulate its climate under four characteristic…

Earth and Planetary Astrophysics · Physics 2014-12-30 Juan M. Lora , Jonathan I. Lunine , Joellen L. Russell , Alexander G. Hayes

We have analysed the ISO-SWS spectrum of Jupiter in the 12-16 micron range, where several hydrocarbons exhibit rovibrational bands. Using temperature information from the methane and hydrogen emissions, we derive the mixing ratios (q) of…

Astrophysics · Physics 2007-05-23 T. Fouchet , E. Lellouch , B. Bezard , H. Feuchtgruber , P. Drossart , T. Encrenaz

Infrared spectroscopic observations have established the presence of hydrocarbon ices on Pluto and other TNOs, but the abundances of such molecules cannot be deduced without accurate optical constants (n, k) and reference spectra. In this…

Instrumentation and Methods for Astrophysics · Physics 2015-02-10 R. L. Hudson , P. A. Gerakines , M. H. Moore

The seasonal evolution of Saturn's polar atmospheric temperatures and hydrocarbon composition is derived from a decade of Cassini Composite Infrared Spectrometer (CIRS) 7-16 $\mu$m thermal infrared spectroscopy. We construct a…

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