Title of article
Seasonal variations in Mercury’s dayside calcium exosphere
Author/Authors
Burger، نويسنده , , Matthew H. and Killen، نويسنده , , Rosemary M. and McClintock، نويسنده , , William E. and Merkel، نويسنده , , Aimee W. and Vervack Jr.، نويسنده , , Ronald J. and Cassidy، نويسنده , , Timothy A. and Sarantos، نويسنده , , Menelaos، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
8
From page
51
To page
58
Abstract
The Mercury Atmospheric and Surface Composition Spectrometer on the MESSENGER spacecraft has observed calcium emission in Mercury’s exosphere on a near-daily basis since March 2011. During MESSENGER’s primary and first extended missions (March 2011 – March 2013) the dayside calcium exosphere was measured over eight Mercury years. We have simulated these data with a Monte Carlo model of exospheric source processes to show that (a) there is a persistent source of energetic calcium located in the dawn equatorial region, (b) there is a seasonal dependence in the calcium source rate, and (c) there are no obvious year-to-year variations in the near-surface dayside calcium exosphere.
Keywords
mercury , Atmospheres , Spectroscopy , Structure , Atmosphere , mercury
Journal title
Icarus
Serial Year
2014
Journal title
Icarus
Record number
2380424
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