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Related papers: Io's Optical Aurorae in Jupiter's Shadow

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Ganymede's aurora are the product of complex interactions between its intrinsic magnetosphere and the surrounding Jovian plasma environment and can be used to derive both atmospheric composition and density. In this study, we analyzed a…

Earth and Planetary Astrophysics · Physics 2024-09-12 Zachariah Milby , Katherine de Kleer , Carl Schmidt , François Leblanc

Io is one of Jupiter's largest moons and the most volcanically active body in the Solar System. Its very active surface has hot spots produced by volcanic eruptions popping up at seemingly random locations and times. Characterizing the…

Earth and Planetary Astrophysics · Physics 2025-08-21 J. Sanchez-Bermudez , I. dePater , A. Conrad , A. Sivaramakrishnan , E. Molter , D. Thatte , R. Cooper , K. deKleer , L. Roth

Along the I24, I27 and I31 flybys of Io (1999-2001), the Energetic Particle Detector (EPD) onboard the Galileo spacecraft observed localised regions of energetic protons losses (155 keV-1250 keV). Using back-tracking particle simulations…

Earth and Planetary Astrophysics · Physics 2024-07-03 H. L. F. Huybrighs , C. P. A. van Buchem , A. Blöcker , V. Dols , C. F. Bowers , C. M. Jackman

The composition of Io's tenuous atmosphere is poorly constrained. Only the major species SO2 and a handful of minor species have been positively identified, but a variety of other molecular species should be present, based on thermochemical…

Earth and Planetary Astrophysics · Physics 2015-06-17 A. Moullet , E. Lellouch , R. Moreno , M. Gurwell , J. Black , B. Butler

We present measurements of the near-infrared brightness of Io's hot spots derived from 2-5 micron imaging with adaptive optics on the Keck and Gemini N telescopes. The data were obtained on 271 nights between August 2013 and the end of…

A substantial fraction of oxygen in diffuse clouds is unaccounted for by observations and is postulated to be in an unknown refractory form, referred to as unidentified depleted oxygen (UDO), which, depending on the local gas density, may…

Observations of the atomic and molecular line emission associated with jets and outflows emitted by young stellar objects can be used to trace the various evolutionary stages they pass through as they evolve to become main sequence stars.…

Solar and Stellar Astrophysics · Physics 2015-06-05 L. Podio , I. Kamp , D. Flower , C. Howard , G. Sandell , A. Mora , G. Aresu , S. Brittain , W. F. R. Dent , C. Pinte , G. J. White

Io and Jupiter constitute a moon-planet system that is unique in our solar system. Io is the most volcanically active planetary body, while Jupiter is the first among the planets in terms of size, mass, magnetic field strength, spin rate,…

Astrophysics · Physics 2007-05-23 A. Bhardwaj , M. Michael

We have conducted laboratory experiments to study the chemistry in hot Jupiter atmospheres with C/O ratio of 0.35. We have compared our results with the ones obtained previously for atmospheres with a C/O ratio of 1 to investigate the…

Earth and Planetary Astrophysics · Physics 2022-04-15 Benjamin Fleury , Murthy S. Gudipati , Bryana L. Henderson , Mark Swain

Using narrow-band images recorded on over 150 nights by the 35 cm coronagraph which comprises PSI's Io Input/Output Facility (IoIO), we detected a 6-month long enhancement in the Jovian sodium nebula. The onset of the enhancement occurred…

Earth and Planetary Astrophysics · Physics 2019-01-28 Jeffrey P. Morgenthaler , Julie A. Rathbun , Carl A. Schmidt , Jeffrey Baumgardner , Nicholas M. Schneider

The Orion Bar is the archetypal edge-on molecular cloud surface illuminated by strong ultraviolet radiation from nearby massive stars. Owing to the close distance to Orion (about 1,350 light-year), the effects of stellar feedback on the…

Astrophysics of Galaxies · Physics 2016-08-23 Javier R. Goicoechea , J. Pety , S. Cuadrado , J. Cernicharo , E. Chapillon , A. Fuente , M. Gerin , C. Joblin , N. Marcelino , P. Pilleri

We present spatially resolved measurements of SO$_2$ and NaCl winds on Io at several unique points in its orbit: before and after eclipse, and at maximum eastern and western elongation. The derived wind fields represent a unique case of…

Earth and Planetary Astrophysics · Physics 2024-12-11 Alexander E. Thelen , Katherine de Kleer , Martin A. Cordiner , Imke de Pater , Arielle Moullet , Statia Luszcz-Cook

The early part of a supernova (SN) light-curve is dominated by radiation escaping from the expanding shock-heated progenitor envelope. For polytropic Hydrogen envelopes, the properties of the emitted radiation are described by simple…

High Energy Astrophysical Phenomena · Physics 2017-04-12 Nir Sapir , Eli Waxman

We measure the flux density, composition, and energy of outflowing ions above the polar cap, accelerated by quasi-static electric fields parallel to the magnetic field and associated with polar cap arcs, using Cluster. Mapping the…

Space Physics · Physics 2016-06-06 L. Maes , R. Maggiolo , J. De Keyser , I. Dandouras , R. C. Fear , D. Fontaine , S. Haaland

Io's intense volcanic activity results in one of the most colorful surfaces in the solar system. Ultraviolet and visible-wavelength observations of Io are critical to uncovering the chemistry behind its volcanic hues. Here, we present…

Earth and Planetary Astrophysics · Physics 2022-12-20 Samantha K. Trumbo , M. Ryleigh Davis , Benjamin Cassese , Michael E. Brown

The Jovian dust streams are high-speed bursts of submicron-sized particles traveling in the same direction from a source in the Jovian system. Since their discovery in 1992, they have been observed by three spacecraft: Ulysses, Galileo and…

Streams of high speed dust particles originate from Jupiter's innermost Galilean moon Io. After release from Io, the particles collect electric charges in the Io plasma torus, gain energy from the co-rotating electric field of Jupiter's…

Currently, the analysis of transmission spectra is the most successful technique to probe the chemical composition of exoplanet atmospheres. But the accuracy of these measurements is constrained by observational limitations and the…

Earth and Planetary Astrophysics · Physics 2015-06-23 P. Montañes-Rodriguez , B Gonzalez-Merino , E. Palle , M. Lopez-Puertas , E. Garcia-Melendo

In the 2 March 1979 issue of Science 203 S. J. Peale, P. Cassen and R. T. Reynolds published their paper "Melting of Io by tidal dissipation" indicating "the dissipation of tidal energy in Jupiter's moon Io is likely to have melted a major…

History and Philosophy of Physics · Physics 2012-11-13 L. A. Morabito

Thermal emission spectra of hot Jupiters have led to key constraints on thermal inversions (or 'stratospheres') in their atmospheres with important implications for their atmospheric processes. Canonically, thermal inversions in hot…

Earth and Planetary Astrophysics · Physics 2019-03-29 Siddharth Gandhi , Nikku Madhusudhan