Io’s Volcanic Activity from Time Domain Adaptive Optics Observations: 2013-2018. (arXiv:1906.05426v1 [astro-ph.EP])

Io’s Volcanic Activity from Time Domain Adaptive Optics Observations: 2013-2018. (arXiv:1906.05426v1 [astro-ph.EP])
<a href="http://arxiv.org/find/astro-ph/1/au:+Kleer_K/0/1/0/all/0/1">Katherine de Kleer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pater_I/0/1/0/all/0/1">Imke de Pater</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Molter_E/0/1/0/all/0/1">Edward M. Molter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Banks_E/0/1/0/all/0/1">Elizabeth Banks</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Davies_A/0/1/0/all/0/1">Ashley Gerard Davies</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Alvarez_C/0/1/0/all/0/1">Carlos Alvarez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Campbell_R/0/1/0/all/0/1">Randy Campbell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Aycock_J/0/1/0/all/0/1">Joel Aycock</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pelletier_J/0/1/0/all/0/1">John Pelletier</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stickel_T/0/1/0/all/0/1">Terry Stickel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kacprzak_G/0/1/0/all/0/1">Glenn G. Kacprzak</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nielsen_N/0/1/0/all/0/1">Nikole M. Nielsen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stern_D/0/1/0/all/0/1">Daniel Stern</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tollefson_J/0/1/0/all/0/1">Joshua Tollefson</a>

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 2018, and include nearly 1000 detections of over 75 unique hot spots.
The 100 observations obtained between 2013 and 2015 have been previously
published in de Kleer and de Pater (2016a); the observations since the start of
2016 are presented here for the first time, and the analysis is updated to
include the full five-year dataset. These data provide insight into the global
properties of Io’s volcanism. Several new hot spots and bright eruptions have
been detected, and the preference for bright eruptions to occur on Io’s
trailing hemisphere noted in the 2013-2015 data (de Kleer and de Pater 2016a)
is strengthened by the larger dataset and remains unexplained. The program
overlapped in time with Sprint-A/EXCEED and Juno observations of the jovian
system, and correlations with transient phenomena seen in other components of
the system have the potential to inform our understanding of the impact of Io’s
volcanism on Jupiter and its neutral/plasma environment.

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 2018, and include nearly 1000 detections of over 75 unique hot spots.
The 100 observations obtained between 2013 and 2015 have been previously
published in de Kleer and de Pater (2016a); the observations since the start of
2016 are presented here for the first time, and the analysis is updated to
include the full five-year dataset. These data provide insight into the global
properties of Io’s volcanism. Several new hot spots and bright eruptions have
been detected, and the preference for bright eruptions to occur on Io’s
trailing hemisphere noted in the 2013-2015 data (de Kleer and de Pater 2016a)
is strengthened by the larger dataset and remains unexplained. The program
overlapped in time with Sprint-A/EXCEED and Juno observations of the jovian
system, and correlations with transient phenomena seen in other components of
the system have the potential to inform our understanding of the impact of Io’s
volcanism on Jupiter and its neutral/plasma environment.

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