| Autor: |
Yi Chai, Roman Brajša, Dale Gary, Joaquim Costa, Stanislav Gunar, Guillermo Gimenez de Castro, Hugh Hudson, Pamela Klaassen, Gregory Fleishman, Atul Mohan, Mats Kirkaune, Alberto Pellizzoni, Mark Booth, Galina Motorina, Caius L. Selhorst, Maryam Saberi, Masumi Shimojo, Paulo J. A. Simoes, Davor Sudar, Ivica Skokić, Stephen M. White, Fabian Menezes, Amelie Saintonge, John Orlowski-Scherer, Antonio Hales, Claudia Cicone, Tony Mroczkowski, Doug Johnstone, Luca Di Mascolo, Minju Lee, Eelco van Kampen, Thomas Maccarone, Daizhong Liu, Matthew Smith, Martin A. Cordiner, Alexander E. Thelen, Miroslav Barta, Sven Wedemeyer |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Open Research Europe, Vol 4 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2732-5121 |
| DOI: |
10.12688/openreseurope.17453.1 |
| Popis: |
Observations at (sub-)millimeter wavelengths offer a complementary perspective on our Sun and other stars, offering significant insights into both the thermal and magnetic composition of their chromospheres. Despite the fundamental progress in (sub-)millimeter observations of the Sun, some important aspects require diagnostic capabilities that are not offered by existing observatories. In particular, simultaneously observations of the radiation continuum across an extended frequency range would facilitate the mapping of different layers and thus ultimately the 3D structure of the solar atmosphere. Mapping large regions on the Sun or even the whole solar disk at a very high temporal cadence would be crucial for systematically detecting and following the temporal evolution of flares, while synoptic observations, i.e., daily maps, over periods of years would provide an unprecedented view of the solar activity cycle in this wavelength regime. As our Sun is a fundamental reference for studying the atmospheres of active main sequence stars, observing the Sun and other stars with the same instrument would unlock the enormous diagnostic potential for understanding stellar activity and its impact on exoplanets. The Atacama Large Aperture Submillimeter Telescope (AtLAST), a single-dish telescope with 50m aperture proposed to be built in the Atacama desert in Chile, would be able to provide these observational capabilities. Equipped with a large number of detector elements for probing the radiation continuum across a wide frequency range, AtLAST would address a wide range of scientific topics including the thermal structure and heating of the solar chromosphere, flares and prominences, and the solar activity cycle. In this white paper, the key science cases and their technical requirements for AtLAST are discussed. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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