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Keck observations of eruptions on Io in 2003–2005

De Pater, Imke Davies, Ashley Gerard Franck Marchis

Published in Icarus

We report observations of four energetic volcanic eruptions on Io: at Tupan Patera on UT 8 March 2003; Tung Yo Patera on UT 28 May 2004; Sui Jen Patera on UT 30 May 2004; and south of Babbar Patera on UT 31 May 2005. The Tung Yo, Sui Jen and south of Babbar Paterae eruptions are in locations where no activity had been seen before. Our observations ...

Beyond Planetary Protection for Exploration: The Need for a Rational Framework for Future Exploitation and Use of Outer ...

Margaret Race Kramer,   W

Published in International COSPAR Assembly meeting in Istanbul  

NASA Workshop on Planetary Protection Knowledge Gaps for Human Extraterrestrial Missions: On the Path towards Planetary ...

Margaret Race

Published in Int. COSPAR Assembly

On the Linear Damping Relation for Density Waves in Saturn's Rings PDF available through Get Fulltext Research

Juergen, Schmidt J, Colwell H, Salo F, Spahn Matthew Tiscareno

Published in The Astrophysical Journal

We revisit the equation for viscous damping of density waves derived from linearized theory. We show that in addition to the coefficient of shear viscosity itself the dependence of this coefficient on the rings surface mass density appears, as well as the coefficient of bulk viscosity. This was noted more than thirty years ago by Goldreich and Tre...

Propeller Peregrinations: Ongoing Observations of Disk-Embedded Migration In Saturn's Rings

Matthew Tiscareno

Published in American Astronomical Society, DDA meeting

The "propeller" moons within Saturn's rings are the first objects ever to have their orbits tracked while embedded in a disk, rather than moving through empty space (Tiscareno et al. 2010, ApJL). The km-sized "giant propellers" whose orbits have been tracked in the outer-A ring, as well as their smaller 0.1-km-sized brethren swarming in the mid-A r...

Physical characteristics of" wisps" in the outer edge of the Keeler Gap in Saturn's rings

Ethan, Arnault Matthew Tiscareno

Published in American Astronomical Society, DDA meeting

We present a catalog of detected wisps , small protrusions of material (0.5 to 2 km) into the Keeler Gap of Saturn s rings from the gap s outer edge. Wisps are characterized by a sharp trailing edge followed by a slow gradation back into the edge on the leading side, typically extending between 0.1 and 1 degree of longitude (240 to 2400 km). Fewer ...

Martian north polar cap summer water cycle

Adrian Brown Calvin, Wendy M Becerra, Patricio Byrne, Shane

Published in arXiv preprint arXiv:1605.03487

A key outstanding question in Martian science is are the polar caps gaining or losing mass and what are the implications for past, current and future climate? To address this question, we use observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) of the north polar cap during late summer for multiple Martian years, to m...

Stellar modelling of Spica, a high-mass spectroscopic binary with a β Cep variable primary component

Tkachenko, Andrew Matthews, J M Aerts, Conny Pavlovski, K Pápics, P I Zwintz, K Cameron, C Walker, Gah Kuschnig, R Degroote, P ...

Published in Monthly Notices of the Royal Astronomical Society

Binary stars provide a valuable test of stellar structure and evolution, because the masses of the individual stellar components can be derived with high accuracy and in a model-independent way. In this work, we study Spica, an eccentric double-lined spectroscopic binary system with a β Cep type variable primary component. We use state-of- the-art ...

Measuring Transit Signal Recovery in the Kepler Pipeline. III. Completeness of the Q1-Q17 DR24 Planet Candidate Catalogu... PDF available through Get Fulltext Research

Jessie L, Christiansen Bruce Clarke Christopher Burke Jon M, Jenkins Stephen T, Bryson Jeffrey Coughlin Fergal Mullally Susan E, Thompson Joseph Twicken Natalie M, Batalha ...

Published in The Astrophysical Journal

With each new version of the Kepler pipeline and resulting planet candidate catalogue, an updated measurement of the underlying planet population can only be recovered with an corresponding measurement of the Kepler pipeline detection efficiency. Here, we present measurements of the sensitivity of the pipeline (version 9.2) used to generate the Q1-...

THEO Concept Mission: Testing the Habitability of Enceladus s Ocean

Phillips-Lander, Charity M Stavros, Natasha Hofgartner, Jason D Sun, Vivian Z Powell, Kathryn E Steuer, Casey J O Rourke, Joesph G Dhaliwal, Jasmeet K Leung, Cecilia W S Petro, Elaine M ...

Published in arXiv preprint arXiv:1605.00579

Saturn s moon Enceladus offers a unique opportunity in the search for life and habitable environments beyond Earth, a key theme of the National Research Council s 2013- 2022 Decadal Survey. A plume of water vapor and ice spews from Enceladus s south polar region. Cassini data suggest that this plume, sourced by a liquid reservoir beneath the moon s...

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