ALMA Memo 628 -- High-cadence observations of the Sun
Abstract
The Atacama Large Millimeter/submillimeter Array (ALMA) offers new diagnostic capabilities for studying the Sun, providing complementary insights through high spatial and temporal resolution at millimeter wavelengths. ALMA acts as a linear thermometer for atmospheric gas, aiding in understanding the solar atmosphere's structure, dynamics, and energy balance. Given the Sun's complex emission patterns and rapid evolution, high-cadence imaging is essential for solar observations. Snapshot imaging is required, though it limits available visibility data, making full exploitation of ALMA's capabilities non-trivial. Challenges in processing solar ALMA data highlight the need for revising and enhancing the solar observing mode. The ALMA development study High-Cadence Imaging of the Sun demonstrated the potential benefits of high cadence observations through a forward modelling approach. The resulting report provides initial recommendations for improved post-processing solar ALMA data and explores increasing the observing cadence to sub-second intervals to improve image reliability.
Keywords
Cite
@article{arxiv.2408.14265,
title = {ALMA Memo 628 -- High-cadence observations of the Sun},
author = {Sven Wedemeyer and Mikolaj Szydlarski and M. Carmen Toribio and Tobia Carozzi and Daniel Jakobsson and Juan Camilo Guevara Gomez and Henrik Eklund and Vasco M. J. Henriques and Shahin Jafarzadeh and Jaime de la Cruz Rodriguez},
journal= {arXiv preprint arXiv:2408.14265},
year = {2024}
}
Comments
ALMA Memo 628 summarising the results of the ESO-funded ALMA development study "High-cadence Imaging of the Sun", concluded in 2023 (74 pages, 53 figures)