English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The collision-induced fundamental vibration-rotation band at 6.4 um is themost significant absorption feature from O2 in the infrared (Timofeyev andTonkov, 1978; Rinslandet al., 1982, 1989), yet it has not been previouslyincorporated into exoplanet spectral analyses for several reasons. Either CIAswere not included or incomplete/obsolete CIA databases were used. Also, thecurrent version of HITRAN does not include CIAs at 6.4 um with other collisionpartners (O2-X). We include O2-X CIA features in our transmission spectroscopysimulations by parameterizing the 6.4 um O2-N2 CIA based on Rinsland etal.(1989) and the O2-CO2 CIA based on Baranov et al. (2004). Here we reportthat the O2-X CIA may be the most detectable O2 feature for transitobservations. For a potentialTRAPPIST-1e analogue system within 5 pc of theSun, it could be the only O2 detectable signature with JWST (using MIRI LRS)for a modern Earth-like cloudy atmosphere with biological quantities of O2.Also, we show that the 6.4 um O2-X CIA would be prominent for O2-richdesiccated atmospheres (Luger and Barnes, 2015) and could be detectable withJWST in just a few transits. For systems beyond 5 pc, this feature couldtherefore be a powerful discriminator of uninhabited planets withnon-biological "false positive" O2 in their atmospheres - as they would only bedetectable at those higher O2 pressures.

Sensitive Probing of Exoplanetary Oxygen via Mid Infrared Collisional Absorption