High-spectral Resolution, Multi-wavelength Center-to-limb Observations of the Sun
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915604374487040 |
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| author | Verma, Meetu Denker, Carsten Pietrow, Alexander G. M. Kamlah, Robert de la Roche, Dominique J. M. Petit dit |
| author_facet | Verma, Meetu Denker, Carsten Pietrow, Alexander G. M. Kamlah, Robert de la Roche, Dominique J. M. Petit dit |
| contents | The center-to-limb variations (CLVs) of photospheric and chromospheric spectral lines were obtained in 2025 July and August using drift scans from the echelle spectrograph of the 0.7 m Vacuum Tower Telescope at the Observatorio del Teide (ODT) in Tenerife, Spain. This instrument can observe four spectral regions simultaneously, enabling multi-line spectroscopy with high spectral resolution of various activity features and the quiet Sun in the lower solar atmosphere. The initial results of Halpha observations demonstrate the diagnostic potential of drift scans obtained with a ground-based, high-resolution telescope. Data products include spectroheliograms and maps of physical parameters such as line-of-sight velocity, line width, and line-core intensity. The combination of the CLV from photospheric and chromospheric lines, as well as the wide range of formation heights of the selected lines, renders this dataset ideal for characterizing stellar and exoplanet atmospheres. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_05174 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-spectral Resolution, Multi-wavelength Center-to-limb Observations of the Sun Verma, Meetu Denker, Carsten Pietrow, Alexander G. M. Kamlah, Robert de la Roche, Dominique J. M. Petit dit Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics The center-to-limb variations (CLVs) of photospheric and chromospheric spectral lines were obtained in 2025 July and August using drift scans from the echelle spectrograph of the 0.7 m Vacuum Tower Telescope at the Observatorio del Teide (ODT) in Tenerife, Spain. This instrument can observe four spectral regions simultaneously, enabling multi-line spectroscopy with high spectral resolution of various activity features and the quiet Sun in the lower solar atmosphere. The initial results of Halpha observations demonstrate the diagnostic potential of drift scans obtained with a ground-based, high-resolution telescope. Data products include spectroheliograms and maps of physical parameters such as line-of-sight velocity, line width, and line-core intensity. The combination of the CLV from photospheric and chromospheric lines, as well as the wide range of formation heights of the selected lines, renders this dataset ideal for characterizing stellar and exoplanet atmospheres. |
| title | High-spectral Resolution, Multi-wavelength Center-to-limb Observations of the Sun |
| topic | Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2511.05174 |