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We have obtained spatially resolved spectra of Titan in the near-infrared J, H and K bands at a resolving power of ~5000 using the near-infrared integral field spectrometer (NIFS) on the Gemini North 8m telescope. Using recent data from the…

Earth and Planetary Astrophysics · Physics 2015-05-27 Jeremy Bailey , Linda Ahlsved , V. S. Meadows

Data from the New Horizons mission to Pluto show no craters on Sputnik Planum down to the detection limit (2 km for low resolution data, 625 m for high resolution data). The number of small Kuiper Belt Objects that should be impacting Pluto…

Earth and Planetary Astrophysics · Physics 2016-02-17 David E. Trilling

We analyzed the thermal emission from the entire surface of the millisecond pulsar PSR J0437-4715 observed in the ultraviolet and soft X-ray bands. For this, we calculated non-magnetized, partially ionized atmosphere models of hydrogen,…

High Energy Astrophysical Phenomena · Physics 2020-01-08 Denis Gonzalez-Caniulef , Sebastien Guillot , Andreas Reisenegger

We study the seasonal evolution of Titan's lower stratosphere (around 15~mbar) in order to better understand the atmospheric dynamics and chemistry in this part of the atmosphere. We analysed Cassini/CIRS far-IR observations from 2006 to…

Earth and Planetary Astrophysics · Physics 2018-01-10 M. Sylvestre , N. A. Teanby , S. Vinatier , S. Lebonnois , P. G. J. Irwin

Observations of Serpens have been performed at the JCMT using Harp-B. Maps over a 4.5'x5.4' region were made in a frequency window around 338 GHz, covering the 7-6 transitions of methanol. Emission is extended over each source, following…

Solar and Stellar Astrophysics · Physics 2015-05-18 L. E. Kristensen , E. F. van Dishoeck , T. A. van Kempen , H. M. Cuppen , C. Brinch , J. K. Jørgensen , M. R. Hogerheijde

So far, the atmospheres of non-transiting exoplanets remain poorly explored, and the potential of high-resolution spectroscopy for determining key planetary parameters beyond their atmospheric properties has not been fully exploited. We…

We present results from an atmospheric circulation study of nine hot Jupiters that comprise a large transmission spectral survey using the Hubble and Spitzer Space Telescopes. These observations exhibit a range of spectral behavior over…

Earth and Planetary Astrophysics · Physics 2016-04-20 Tiffany Kataria , David K. Sing , Nikole K. Lewis , Channon Visscher , Adam P. Showman , Jonathan J. Fortney , Mark S. Marley

(Abridged) The orbits of the recently discovered satellites of Pluto, S/2005 P2 and S/2005 P1, are significantly non-Keplerian, even if P2 and P1 have negligible masses, because the mass ratio of Charon-Pluto is ~0.1. We present an analytic…

Astrophysics · Physics 2007-05-23 Man Hoi Lee , S. J. Peale

Saturn's Great Storm of 2010 - 2011 produced a planet-encircling wake that slowly transitioned from a region that was mainly dark at 5 microns in February 2011 to a region that was almost entirely bright and remarkably uniform by December…

Earth and Planetary Astrophysics · Physics 2016-11-14 L. A. Sromovsky , K. H. Baines , P. M. Fry , T. W. Momary

We present comprehensive experimental line lists of methane (CH4) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for the temperatures 300 - 1400 degC at twelve 100…

Instrumentation and Methods for Astrophysics · Physics 2013-08-23 R. J. Hargreaves , C. A. Beale , L. Michaux , M. Irfan , P. F. Bernath

We present Herschel PACS photometry of 18 Plutinos and determine sizes and albedos for these objects using thermal modeling. We analyze our results for correlations, draw conclusions on the Plutino size distribution, and compare to earlier…

Saturn's moon Enceladus has vents emerging from a sub-surface ocean, offering unique probes into the liquid environment. These vents drain into the larger neutral torus in orbit around Saturn. We present a methanol (CH3OH) detection…

Earth and Planetary Astrophysics · Physics 2017-09-28 E. Drabek-Maunder , J. Greaves , H. J. Fraser , D. L. Clements , L. -N. Alconcel

We simulate atmospheric fractionation in escaping planetary atmospheres using IsoFATE, a new open-source numerical model. We expand the parameter space studied previously to planets with tenuous atmospheres that exhibit the greatest helium…

Earth and Planetary Astrophysics · Physics 2024-04-30 Collin Cherubim , Robin Wordsworth , Renyu Hu , Evgenya Shkolnik

Remote sensing observations indicate that Europa is surrounded by a tenuous atmosphere. Furthermore, recent observations and historic data from Galileo hint at the occurrence of water vapour eruptions originating from the interior that…

Space Physics · Physics 2019-01-03 Hans Leo Frans Huybrighs

We study the transport of methane in the external water envelopes surrounding water-rich super-Earths and estimate its outgassing into the atmosphere. We investigate the influence of methane on the thermodynamics and mechanics of the water…

Earth and Planetary Astrophysics · Physics 2014-08-28 Amit Levi , Dimitar Sasselov , Morris Podolak

A recent study by Ramirez et al. (2014) demonstrated that an atmosphere with 1.3-4 bar of CO2 and H2O, in addition to 5-20% H2, could have raised the mean annual and global surface temperature of early Mars above the freezing point of…

Earth and Planetary Astrophysics · Physics 2015-07-10 Natasha Batalha , Shawn D. Domagal-Goldman , Ramses Ramirez , James Kasting

Color ratios derived from molecular hydrogen emissions provide valuable diagnostics for the energy of precipitating electrons and the structure of the auroral atmosphere. We aim to characterize the horizontal and vertical variability of…

Earth and Planetary Astrophysics · Physics 2026-03-25 J. Vinesse , B. Bonfond , B. Benmahi , A. Moirano , D. Grodent , T. K. Greathouse , V. Hue , G. Sicorello , L. A. Head , G. R. Gladstone , M. W. Davis

On 2007 December 16-17, spectra were acquired of the disk of Uranus by the Spitzer Infrared Spectrometer (IRS) when its equator was close to the sub-earth point. This spectrum provides the highest-resolution broad-band spectrum ever…

A defining characteristic of the planet Venus is its thick, CO2-dominated atmosphere. Despite over fifty years of robotic exploration, including thirteen successful atmosphere probes and landers, our knowledge of N2, the…

Earth and Planetary Astrophysics · Physics 2019-11-15 Patrick N. Peplowski , David J. Lawrence , Jack T. Wilson

Observations of Uranus were made on the 8/9th November with HST/WFC3 at a time when a huge cloud complex was present at 30 - 40N. We imaged Uranus in seven filters spanning 467 - 924 nm, and analysed these observations with the NEMESIS…

Earth and Planetary Astrophysics · Physics 2017-02-22 Patrick G. J. Irwin , Michael H. Wong , Amy A. Simon , G. S. Orton , Daniel Toledo