The flat bottomed lines of Vega
R. Monier, M. Gebran, F. Royer, T. K{\i}l{\i}co\u{g}lu
TL;DR
This study analyzes high-resolution spectra of Vega to identify and measure 149 flat-bottomed spectral lines, primarily from neutral atomic species, enhancing understanding of Vega's atmospheric composition.
Contribution
The paper provides a detailed identification and measurement of flat-bottomed lines in Vega's spectrum using high-quality data and spectrum synthesis modeling, which is a novel detailed analysis for this star.
Findings
Identified 149 flat-bottomed lines in Vega's spectrum.
Most lines originate from neutral species like Fe I and others.
Spectrum modeling confirms line identifications.
Abstract
Using one high dispersion high quality spectrum of Vega (HR7001, A0V) obtained with the echelle spectrograph SOPHIE at Observatoire de Haute Provence, we have measured the centroids of 149 flat-bottomed lines. The model atmosphere and spectrum synthesis modeling of the spectrum of Vega allows us to provide identifications for all these lines. Most of these lines are due to C I, O I, Mg I, Al I, Ca I, Sc II,Ti II, Cr I, Cr II, Mn I, Fe I, Fe II, Sr II, Ba II, the large majority being due to neutral species, in particular Fe I.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astrophysics and Star Formation Studies · Astro and Planetary Science