Calchetti Daniele, Jefferies Stuart M, Fleck Bernhard, Berrilli Francesco, Shcherbik Dmitriy V
Department of Physics, University of Rome Tor Vergata, 00133, Italy.
Department of Physics and Astronomy, Georgia State University, Atlanta GA 30303, USA.
Philos Trans A Math Phys Eng Sci. 2021 Feb 8;379(2190):20200178. doi: 10.1098/rsta.2020.0178. Epub 2020 Dec 21.
Internal gravity waves have been observed in the Earth's atmosphere and oceans, on Mars and Jupiter, and in the Sun's atmosphere. Despite ample evidence for the existence of propagating gravity waves in the Sun's atmosphere, we still do not have a full understanding of their characteristics and overall role for the dynamics and energetics of the solar atmosphere. Here, we present a new approach to study the propagation of gravity waves in the solar atmosphere. It is based on calculating the three-dimensional cross-correlation function between the vertical velocities measured at different heights. We apply this new method to a time series of co-spatial and co-temporal Doppler images obtained by SOHO/MDI and Hinode/SOT as well as to simulations of upward propagating gravity wave-packets. We show some preliminary results and outline future developments. This article is part of the Theo Murphy meeting issue 'High-resolution wave dynamics in the lower solar atmosphere'.
在地球的大气层和海洋、火星和木星以及太阳的大气层中都观测到了内重力波。尽管有充分证据表明太阳大气层中存在传播的重力波，但我们仍未完全了解它们的特征以及对太阳大气层动力学和能量学的整体作用。在此，我们提出一种研究太阳大气层中重力波传播的新方法。它基于计算在不同高度测量的垂直速度之间的三维互相关函数。我们将这种新方法应用于由太阳和日球层观测台/ Michelson 多普勒成像仪（SOHO/MDI）和日地关系天文台/太阳光球望远镜（Hinode/SOT）获得的共空间和共时间多普勒图像的时间序列，以及向上传播的重力波包的模拟。我们展示了一些初步结果并概述了未来的发展。本文是 Theo Murphy 会议议题“太阳低层大气中的高分辨率波动动力学”的一部分。
