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2018AJ....155...92I - Astron. J., 155, 92-92 (2018/February-0)

Spatially resolved sub-millimeter continuum imaging of Neptune with ALMA.

IINO T. and YAMADA T.

Abstract (from CDS):

This paper reports the result of spatially resolved 646 GHz sub-millimeter imaging observation of Neptune obtained by the Atacama Large Millimeter and sub-millimeter Array. The observation was performed in 2012 August as the flux calibration and synthesized beam size were small enough to resolve Neptune's disk at this time. This analysis aims to constrain the vertical structure of deep and upper-tropospheric South polar hot spot detected previously with mid-IR, millimeter, and centimeter wavelength. The probed atmospheric pressure region estimated by the radiative-transfer method was between 1.0 and 0.6 bar for the nadir and South pole views, respectively. The South polar hot spot was not detected clearly with an uncertainty of 2.1 K. The apparent discontinuity of tropospheric and stratospheric hot spot may be caused by the vertical wind shear of South polar zonal jet.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): planets and satellites: atmospheres - submillimeter: planetary systems - submillimeter: planetary systems

Simbad objects: 1

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2019.10.19-15:17:45

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