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                  Exoplanets and the Search for Atmospheric Biosignature Gases"

 

        Date:

    Download-files:

      Time:

 Thursday, 15 April 2021

    Video-Recording for any system with MP4-support

   - Video.mp4  (ca.340 Mb)

   - Video_with_eng_sub.mp4  (ca. 345 Mb)

 

 15:15 – 16:25

 

 

Abstract:

 

Thousands of exoplanets are known to orbit nearby stars and small rocky planets

are established to be common.  Driving the field is the study of exoplanet

atmospheres, with the goal of detecting a gas that might be indicative of life.

A suitable “biosignature gas” is not just one that might be produced by life, but

one that: can accumulate in an atmosphere against atmospheric radicals and

other sinks; has strong atmospheric spectral features; and has limited abiological

false positives. Which gases might be potential biosignature gases in an as yet

unknown range of exoplanetary environments? New computer simulations and

next-generation telescopes coming online means the ambitious goal of searching

for “biosignature gases” in a rocky exoplanet atmosphere is within reach.

 

Speaker today:    Sara Seager  (Massachusetts Institute of Technology)

 

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