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Measuring the density and temperature of the corona using high dynamic range low frequency images from the OVRO-LWA

Presentation #501.01 in the session Coronal Diagnostics.

Published onSep 18, 2023
Measuring the density and temperature of the corona using high dynamic range low frequency images from the OVRO-LWA

Owens Valley Radio Observatory Long Wavelength Array is a new all-sky imager operating at the 15-88 MHz range. It is currently under commission and we envisage that it will observe the Sun routinely and produce high dynamic range solar images at these low radio frequencies. Here we present preliminary results from a commissioning observation taken on March 9, 2023. The Sun was quiet during the time of this observation. We have produced high dynamic range snapshot images of the quiet Sun, each with an integration time of 10 seconds, and used these images to estimate the density variation of the solar corona based on the method of Mercier & Chambe (2015) and Vocks et al. (2018). We present a comparison of our results to densities obtained by inverting data from other instruments operating in other wavelengths like the Extreme Ultraviolet and white light.

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