PreprintCC BY 4.0arXiv
A forest of emission lines observed by Sunrise III/SUSI above the solar limb
Abstract
We present off-limb spectroscopy using low-straylight data from the Sunrise Spectropolarimeter and Imager (SUSI) onboard the Sunrise III stratospheric solar observatory. A spatial scan with SUSI's slit almost parallel to the local limb reached from within the solar disc to 6.5 Mm off-limb. The wavelength range spanned from 407.6 to 410.25 nm. We detected a total of 174 spectral lines in emission off-limb, a 2.5-fold increase over previous reports. Surprisingly, 122 of these lines begin to appear in emission already on the disc, although close to the limb. In addition, one-fifth of relatively prominent emission lines are due to rare-earth and heavy elements and molecules, where the absorption lines of these transitions are typically weak on-disc.
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BibTeX
@misc{duran2026forest,
title = {{A forest of emission lines observed by Sunrise III/SUSI above the solar limb}},
author = {J. S. Castellanos Durán and F. A. Iglesias and S. K. Solanki and A. Lagg and I. Milic and H. N. Smitha and D. Vukadinović and T. L. Riethmüller and A. Gandorfer and A. Feller and J. Blanco Rodríguez and D. Orozco Suárez and Y. Katsukawa and J. Hölken and J. C. del Toro Iniesta and S. Rao and M. Sánchez Toledo and K. Singh and P. Bernasconi and T. Berkefeld and A. Alvarez-Herrero and M. Kubo and V. Martínez Pillet and B. Grauf and M. Carpenter and A. Bell and H. Strecker and A. L. Siu-Tapia and P. Santamarina Guerrero and Y. Kawabata and T. Matsumoto and R. T. Ishikawa and E. Harnes and T. Oba},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.04121},
eprint = {2610.04121},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.04121},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - A forest of emission lines observed by Sunrise III/SUSI above the solar limb
AU - J. S. Castellanos Durán
AU - F. A. Iglesias
AU - S. K. Solanki
AU - A. Lagg
AU - I. Milic
AU - H. N. Smitha
AU - D. Vukadinović
AU - T. L. Riethmüller
AU - A. Gandorfer
AU - A. Feller
AU - J. Blanco Rodríguez
AU - D. Orozco Suárez
AU - Y. Katsukawa
AU - J. Hölken
AU - J. C. del Toro Iniesta
AU - S. Rao
AU - M. Sánchez Toledo
AU - K. Singh
AU - P. Bernasconi
AU - T. Berkefeld
AU - A. Alvarez-Herrero
AU - M. Kubo
AU - V. Martínez Pillet
AU - B. Grauf
AU - M. Carpenter
AU - A. Bell
AU - H. Strecker
AU - A. L. Siu-Tapia
AU - P. Santamarina Guerrero
AU - Y. Kawabata
AU - T. Matsumoto
AU - R. T. Ishikawa
AU - E. Harnes
AU - T. Oba
PY - 2026
DA - 2026/10/14
PB - arXiv
DO - 10.48550/arxiv.2610.04121
UR - https://arxiv.org/abs/2610.04121
AB - We present off-limb spectroscopy using low-straylight data from the Sunrise Spectropolarimeter and Imager (SUSI) onboard the Sunrise III stratospheric solar observatory. A spatial scan with SUSI's slit almost parallel to the local limb reached from within the solar disc to 6.5 Mm off-limb. The wavelength range spanned from 407.6 to 410.25 nm. We detected a total of 174 spectral lines in emission off-limb, a 2.5-fold increase over previous reports. Surprisingly, 122 of these lines begin to appear in emission already on the disc, although close to the limb. In addition, one-fifth of relatively prominent emission lines are due to rare-earth and heavy elements and molecules, where the absorption lines of these transitions are typically weak on-disc.
ER -