Astrophysics (Index)About

helium 1083 nm line

(helium 1080 nm line)
(helium line viewable through atmospheric windows)

The helium 1083 nm line (sometimes referred to as the helium 1080 nm line) is a line triplet (i.e., three fine structure lines) of helium in a metastable state. It is a near infrared line but within optical atmospheric window, and little affected by the interstellar medium, thus useful for ground observation. Thin helium surrounding an extra-solar planet undergoing atmospheric escape can create the right conditions to generate an absorption line detectable through transmission spectroscopy.


(helium,spectrography)
Further reading:
https://ui.adsabs.harvard.edu/abs/2018Sci...362.1388N/abstract
https://ui.adsabs.harvard.edu/abs/2015ApJ...808..124S/abstract
https://ui.adsabs.harvard.edu/abs/1996SoPh..163...79B/abstract
https://ui.adsabs.harvard.edu/abs/1956ApJ...124...13M/abstract

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