1229846
doi
10.1006/icar.2001.6766
oai:zenodo.org:1229846
High-Resolution Infrared Imaging of Neptune from the Keck Telescope
Gibbard, S.
info:eu-repo/semantics/openAccess
Creative Commons Zero v1.0 Universal
https://creativecommons.org/publicdomain/zero/1.0/legalcode
We present results of infrared observations of Neptune from the 10-m W. M. Keck I Telescope, using both high-resolution (0.04 arcsecond) broadband speckle imaging and conventional imaging with narrowband filters (0.6 arcsec resolution). The speckle data enable us to track the size and shape of infrared-bright features ("storms") as they move across the disk and to determine rotation periods for latitudes −30 and −45°. The narrowband data are input to a model that allows us to make estimates of Neptune's stratospheric haze abundance and the size of storm features. We find a haze column density of ∼106 cm−2 for a haze layer located in the stratosphere, and a lower limit of 107 cm−2 and an upper limit of 109 cm−2 for a layer of 0.2 μm particles in the troposphere. We also calculate a lower limit of 7×106 km2 for the size of a "storm" feature observed on 13 October 1997.
Zenodo
2002-03-01
info:eu-repo/semantics/article
1229845
1579540223.565667
849475
md5:25db6055d401534643781bb1a9daf5b8
https://zenodo.org/records/1229846/files/article.pdf
public