English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present the results of an investigation using near-infrared spectra ofPluto taken on 72 separate nights using SpeX/IRTF. These data were obtainedbetween 2001 and 2013 at various sub-observer longitudes. The aim of this workwas to confirm the presence of ethane ice and to determine any longitudinaltrends on the surface of Pluto. We computed models of the continuum near the2.405 {\mu}m band using Hapke theory and calculated an equivalent width of theethane absorption feature for six evenly-spaced longitude bins and a grandaverage spectrum. The 2.405 {\mu}m band on Pluto was detected at the7.5-{\sigma} level from the grand average spectrum. Additionally, the band wasfound to vary longitudinally with the highest absorption occurring in theN$_2$-rich region and the lowest absorption occurring in the visibly darkregion. The longitudinal variability of $^{12}$CO does not match that of the2.405 {\mu}m band, suggesting a minimal contribution to the band by $^{13}$CO.We argue for ethane production in the atmosphere and present a theory ofvolatile transport to explain the observed longitudinal trend.

Evidence for longitudinal variability of ethane ice on the surface of Pluto