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SUMMARY:Prebiotic Chemistry\, Exoplanets and Stellar Flaring - Lukas Rossm
 anith
DTSTART:20250603T101500Z
DTEND:20250603T110000Z
UID:TALK232696@talks.cam.ac.uk
CONTACT:David Buscher
DESCRIPTION:Nitroprusside is an important prebiotic molecule\, thought to 
 contribute to reaction pathways\nthat lead to the production of amino acid
  chains (Mariani et al. [2018]). Nitroprusside can be\nmade from Ferrocyan
 ide photochemically. It has been found that the timescales for this reacti
 on\non Early Earth would have been between an order of days to months \, m
 aking this route of\nabiotic production very useful in further prebiotic r
 eaction networks and an important factor to\nconsider when discussing the 
 viability of life to evolve on a planet (Rimmer et al. [2021]). Here we\ni
 nvestigate this reaction with a focus on constant and time varied radiatio
 n\, meaning experimental\nruns involving the sample being subjected to a c
 onstant flux of UV light and runs with UV flux\nchanging over time. FlareL
 ab makes use of a broad band UV-Vis Laser Driven Light Source\n(LDLS)\, to
  experimentally simulate stellar irradiation and stellar flaring activity.
  The reasoning\nbehind investigating flares is based on recent findings th
 at have shown that M-dwarves are prone\nto flaring (G¨unther et al. [2020
 ]). Flaring for M-dwarves is also shown to be the best way to get\nenough 
 UV to an exoplanet’s surface for good yield of photochemical products (R
 anjan et al. [2017]).\nWith M-dwarves seen as the best stars to look at to
  detect small rocky planets\, it is important\nto consider how flaring cou
 ld effect the production of Nitroprusside and if there’s a discrepancy\n
 between assuming a constant irradiation of the surface or taking into acco
 unt flaring.\n\nWe show that FlareLab can be used as a means of detecting 
 the production of Nitroprusside\nin-situ during the irradiation period. We
  also compare the constant flux and variable flux regimes\,\nand discuss t
 he implications of these findings.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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