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SUMMARY:Pathway to study molecular oxygen in exoplanet atmosphere with FIO
 S - Surangkhana Rukdee (MPE Garching)
DTSTART:20230919T120000Z
DTEND:20230919T130000Z
UID:TALK205141@talks.cam.ac.uk
CONTACT:Dr Emily Sandford
DESCRIPTION:The upcoming Extremely Large Telescopes (ELTs) are expected to
  have a sufficient collecting area required to detect potential biosignatu
 re gases such as molecular oxygen\, O2 in the atmosphere of terrestrial pl
 anets around nearby stars. One of the most promising detection methods is 
 transmission spectroscopy. To maximize our capability to detect O2 using t
 his method\, spectral resolutions R≥ 300\,000 are required to fully reso
 lve the absorption lines in an Earth-like exoplanet atmosphere and disenta
 ngle the signal from telluric lines. Current high-resolution spectrographs
  typically achieve a spectral resolution of R~100\,000. Increasing the res
 olution in seeing limited observations and/or instruments requires drastic
 ally larger optical components\, making these instruments even more expens
 ive and hard to fabricate and assemble. Instead\, we demonstrate a new app
 roach to high-resolution spectroscopy. We implemented an ultra-high spectr
 al resolution booster to be coupled to a high-resolution spectrograph. The
  instrument is based on a chained Fabry-Perot array which generates a hype
 rfine spectral profile. We present on-sky telluric observations with a lab
  demonstrator. Depending on the configuration\, this two-arm prototype rea
 ches a resolution of R=250\,000-350\,000. The novel FPI resolution booster
  can be plugged in at the front end of an existing R=100\,000 spectrograph
  to overwrite the spectral profile with a higher resolution for exoplanet 
 atmosphere studies. In this talk\, I will further discuss a pathway to the
  study of molecular oxygen and the environmental context in exoplanet atmo
 spheres.
LOCATION:Ryle seminar room + ONLINE - Details to be sent by email
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