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Center-to-limb variation of spectral lines and their effect on full-disk observations

Published online by Cambridge University Press:  23 December 2024

Alexander G. M. Pietrow Open the ORCID record for Alexander G. M. Pietrow [Opens in a new window]  and
Adur Pastor Yabar
Alexander G. M. Pietrow*
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany
Adur Pastor Yabar
Affiliation:
Institute for Solar Physics, Dept. of Astronomy, Stockholm University, Albanova University Centre, SE-106 91 Stockholm, Sweden
*
email: apietrow@aip.de
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Abstract

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An accurate description of the center-to-limb variation (CLV) of stellar spectra is becoming an increasingly critical factor in both stellar and exoplanet characterization. In particular, the CLV of spectral lines is extremely challenging as its characterization requires highly detailed knowledge of the stellar physical conditions. To this end, we present the Numerical Empirical Sun-as-a-Star Integrator (NESSI) as a tool for translating high-resolution solar observations of a partial field of view into disk-integrated spectra that can be used to test common assumptions in stellar physics.

Keywords

Methods: miscellaneousLine: formationSun: photosphereSun: chromosphere
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S365: Dynamics of Solar and Stellar Convection Zones and Atmospheres , December 2023 , pp. 389 - 393
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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