Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Solar and stellar observations
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| Formato: | Preprint |
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2024
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| author | Wedemeyer, Sven Barta, Miroslav Brajsa, Roman Chai, Yi Costa, Joaquim Gary, Dale de Castro, Guillermo Gimenez Gunar, Stanislav Fleishman, Gregory Hales, Antonio Hudson, Hugh Kirkaune, Mats Mohan, Atul Motorina, Galina Pellizzoni, Alberto Saberi, Maryam Selhorst, Caius L. Simoes, Paulo J. A. Shimojo, Masumi Skokic, Ivica Sudar, Davor Menezes, Fabian White, Stephen Booth, Mark Klaassen, Pamela Cicone, Claudia Mroczkowski, Tony Cordiner, Martin A. Di Mascolo, Luca Johnstone, Doug van Kampen, Eelco Lee, Minju Liu, Daizhong Maccarone, Thomas Orlowski-Scherer, John Saintonge, Amelie Smith, Matthew Thelen, Alexander E. |
| author_facet | Wedemeyer, Sven Barta, Miroslav Brajsa, Roman Chai, Yi Costa, Joaquim Gary, Dale de Castro, Guillermo Gimenez Gunar, Stanislav Fleishman, Gregory Hales, Antonio Hudson, Hugh Kirkaune, Mats Mohan, Atul Motorina, Galina Pellizzoni, Alberto Saberi, Maryam Selhorst, Caius L. Simoes, Paulo J. A. Shimojo, Masumi Skokic, Ivica Sudar, Davor Menezes, Fabian White, Stephen Booth, Mark Klaassen, Pamela Cicone, Claudia Mroczkowski, Tony Cordiner, Martin A. Di Mascolo, Luca Johnstone, Doug van Kampen, Eelco Lee, Minju Liu, Daizhong Maccarone, Thomas Orlowski-Scherer, John Saintonge, Amelie Smith, Matthew Thelen, Alexander E. |
| contents | 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, simultaneous 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 50\,m 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_00920 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Solar and stellar observations Wedemeyer, Sven Barta, Miroslav Brajsa, Roman Chai, Yi Costa, Joaquim Gary, Dale de Castro, Guillermo Gimenez Gunar, Stanislav Fleishman, Gregory Hales, Antonio Hudson, Hugh Kirkaune, Mats Mohan, Atul Motorina, Galina Pellizzoni, Alberto Saberi, Maryam Selhorst, Caius L. Simoes, Paulo J. A. Shimojo, Masumi Skokic, Ivica Sudar, Davor Menezes, Fabian White, Stephen Booth, Mark Klaassen, Pamela Cicone, Claudia Mroczkowski, Tony Cordiner, Martin A. Di Mascolo, Luca Johnstone, Doug van Kampen, Eelco Lee, Minju Liu, Daizhong Maccarone, Thomas Orlowski-Scherer, John Saintonge, Amelie Smith, Matthew Thelen, Alexander E. Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics 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, simultaneous 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 50\,m 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. |
| title | Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Solar and stellar observations |
| topic | Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2403.00920 |