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We aim to study the atmospheric properties of the warm Neptune GJ 436 b by combining a set of five transit events observed with the CARMENES spectrograph with one transit from CRIRES$^+$ so as to provide the most constrained results…

Throughout 2017, the Hubble Space Telescope (HST) observed the northern far-ultraviolet aurorae of Saturn at northern solstice, during the Cassini Grand Finale. These conditions provided a complete viewing of the northern auroral region…

Earth and Planetary Astrophysics · Physics 2018-08-27 L. Lamy , R. Prangé , C. Tao , T. Kim , S. V. Badman , P. Zarka , B. Cecconi , W. S. Kurth , W. Pryor , E. Bunce , A. Radioti

We present spatially resolved ($0.1'' - 1.0''$) radio maps of Neptune taken from the Very Large Array and Atacama Large Submillimeter/Millimeter Array between $2015-2017$. Combined, these observations probe from just below the main methane…

Earth and Planetary Astrophysics · Physics 2021-04-15 Joshua Tollefson , Imke de Pater , Edward M. Molter , Robert J. Sault , Bryan J. Butler , Statia Luszcz-Cook , David DeBoer

The Cassini mission unveiled the intense and diverse activity in Saturn's atmosphere: banded jets, waves, vortices, equatorial oscillations. To set the path towards a better understanding of those phenomena, we performed high-resolution…

Saturn's axial tilt of 26.7{\deg} produces seasons in a similar way as on Earth. Both the stratospheric temperature and composition are affected by this latitudinally varying insolation along Saturn's orbital path. A new time dependent 2D…

Earth and Planetary Astrophysics · Physics 2015-06-03 Vincent Hue , Thibault Cavalié , Michel Dobrijevic , Franck Hersant , Thomas K. Greathouse

We present the first spectral features obtained from Cassini's Composite Infrared Spectrometer (CIRS) for any icy moon. The spectral region covered by CIRS focal planes (FP) 3 and 4 is rich in emissivity features, but previous studies at…

This study presents a 13 years survey of haze UV extinction profiles, monitoring the temporal evolution of the detached haze layer (DHL) in Titan's upper atmosphere (350-600 km). As reported by West et al. 2011 (GRL vol.38, L06204) at the…

Earth and Planetary Astrophysics · Physics 2021-02-11 Benoît Seignovert , Pascal Rannou , Robert A. West , Sandrine Vinatier

Image photometry reveals that the F ring is approximately twice as bright during the Cassini tour as it was during the Voyager flybys of 1980 and 1981. It is also three times as wide and has a higher integrated optical depth. We have…

The Cassini mission offered us the opportunity to monitor the seasonal evolution of Titan's atmosphere from 2004 to 2017, i.e. half a Titan year. The lower part of the stratosphere (pressures greater than 10 mbar) is a region of particular…

Earth and Planetary Astrophysics · Physics 2020-06-24 M. Sylvestre , N. A. Teanby , J. Vatant d'Ollone , S. Vinatier , B. Bézard , S. Lebonnois , P. G. J. Irwin

Saturn's polar stratosphere exhibits the seasonal growth and dissipation of broad, warm, vortices poleward of $\sim75^\circ$ latitude, which are strongest in the summer and absent in winter. The longevity of the exploration of the Saturn…

We present novel observations utilising the Cassini spacecraft to conduct an observing campaign for stellar astronomy from a vantage point in the outer solar system. By exploiting occultation events in which Mira passed behind the Saturnian…

Instrumentation and Methods for Astrophysics · Physics 2013-06-24 Paul N. Stewart , Peter G. Tuthill , Matthew M. Hedman , Philip D. Nicholson , James P. Lloyd

Observations of Neptune, made in 2018 using the new Narrow Field Adaptive Optics mode of the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope (VLT) from 0.48 - 0.93 micron, are analysed here to determine the…

During the thirteen years in orbit around Saturn before its final plunge, the Cassini spacecraft provided more than ten thousand astrometric measurements. Such large amounts of accurate data enable the search for extremely faint signals in…

Earth and Planetary Astrophysics · Physics 2019-03-11 Valéry Lainey , Benoît Noyelles , Nicholas Cooper , Carl Murray , Ryan Park , Nicolas Rambaux

The atmosphere of Venus is characterized by strong superrotation, in which the wind velocities at cloud heights are around 60 times faster than the surface rotation rate. The reasons for this strong superrotation are still not well…

Earth and Planetary Astrophysics · Physics 2019-02-05 Helen F. Parish , Jonathan L. Mitchell

We present evidence for condensed phase methane precipitation near Xanadu using nine nights of observations from the SINFONI integral-field spectrograph at the Very Large Telescope and imaging analysis with empirical surface subtraction.…

Earth and Planetary Astrophysics · Physics 2015-05-13 M. Ádámkovics , I. de Pater , M. Hartung , J. W. Barnes

We present an analysis of recent high spatial and spectral resolution ground-based infrared observations of H3+ spectra obtained with the 10-metre Keck II telescope in April 2011. We observed H3+ emission from Saturn's northern and southern…

Venus is known for its extreme surface temperature and its sulfuric acid clouds. But the cloud layers on Venus have similar temperature and pressure conditions to those on the surface of Earth and are conjectured to be a possible habitat…

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 present the first systematic study of clouds observed during twilight on Mars. We analyze images obtained by the Visual Monitoring Camera (VMC) on Mars Express between 2007 and 2020. Using an automated retrieval algorithm we found 407…

Earth and Planetary Astrophysics · Physics 2021-04-07 J. Hernandez-Bernal , A. Sanchez-Lavega , T. del Rio-Gaztelurrutia , R. Hueso , E. Ravanis , A. Cardesin-Moinelo , S. Wood , D. Titov

Certain spiral density waves in Saturn's rings are generated through resonances with planetary normal modes, making them valuable probes of Saturn's internal structure. Previous research has primarily focused on the rotation rates of these…