File:The two GHOST spectra (labeled) (noirlab2217h).tiff

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Captions

Captions

This mosaic shows the two GHOST spectra of HD 222925, a remarkably bright, chemically complex star. This star is a prime example of the type of object that GHOST will investigate.

Summary[edit]

Description
English: This mosaic shows the two GHOST spectra of HD 222925, a remarkably bright, chemically complex star. This star is a prime example of the type of object that GHOST will investigate. The dark lines in the rainbow are absorption lines — fingerprints of the gasses present in the star, including hydrogen, calcium, and also numerous metals like iron and gold. To the right a number of features from molecules in the Earth’s own atmosphere are seen. Any ground-based observation is subject to contamination from telluric (Earth-originating) sources like water vapor and oxygen. The effect of these lines is normally removed in subsequent steps of the analysis process.
Date 20 July 2022, 07:30 (upload date)
Source The two GHOST spectra (labeled)
Author International Gemini Observatory/NOIRLab/NSF/AURA/GHOST Consortium
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current20:00, 10 July 2023Thumbnail for version as of 20:00, 10 July 20238,493 × 4,312 (209.58 MB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/original/noirlab2217h.tif via Commons:Spacemedia

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