ELFT HÍRADÓ

[Zimányiné Horváth Vera <Vera.Horvath AT eli-alps.hu>]

Előadó:                Murthy S. Gudipati (Senior Research Scientist, Science 
Division, NASA Jet Propulsion Laboratory, California Institute of Technology, 
Pasadena, USA)
Cím:                     Understanding Radiation Processing of Astrophysical 
and Planetary Ice and Atmosphere Analogs

Helyszín:             ELI ALPS C-128  (Szeged, Wolfgang Sandner utca 3.)
Időpont:             2024. május 3. 10 óra

Az előadás rövid összefoglalója:

One of the key goals of astrochemistry is to simulate astrophysical and 
planetary conditions in the laboratory in order to understand physical and 
chemical processes that occur in those environments. Astrophysical and 
planetary conditions range from ultracold molecular clouds to hot 
exoplanetary atmospheres, covering gas, liquid, and solid phases at ultrahigh 
vacuum to megabar pressures,  radiation from stars, cosmic rays, and local 
magnetospheric radiation environments, requiring broad range of researchers 
to contribute to the field of astrochemistry. Our contribution has been in 
two fields: (a) physics and chemistry of ice and organics in radiation 
environments; (b) simulations of exoplanet atmospheres simulating 
photochemistry at high-temperatures in the gas-phase.

At the Ice Spectroscopy Laboratory (ISL) at JPL, we conducted Lya 
UV-photolysis of astrophysical ices and showed that the formation of 
molecules of life such as HCN, formamide, etc., demonstrating that some of 
the key organic molecules needed for the origin of life could have already 
formed in the interstellar ice grains [1]. Significant new experimental and 
observational data are needed to close the knowledge gaps in this area of 
research, which is critical to test the hypothesis that early bombardment 
from comets and asteroids about 4 billion years ago would have brought water 
and organic molecules to Earth kickstarting origin of life on Earth [2-4].

Further research activities in our lab over the past decade simulating 
radiation processing of planetary ices - atmospheric and surface - will be 
discussed. Our most recent work on simulating photochemistry of 
high-temperature exoplanet atmospheres will also be discussed.

Acknowledgment: This work was carried out at the Jet Propulsion Laboratory, 
California Institute of Technology, under a contract with the National 
Aeronautics and Space Administration (NASA). Funding from NASA through DDAP, 
HW, NFDAP, SSW, and XRP programs is acknowledged.

References:
1.            Henderson, B.L. and M.S. Gudipati, Astrophysical Journal, 2015. 
800(1): p. 66.
2.            Greenberg, J.M., Instruments, Methods, and Missions for the 
Investigation of Extraterrestrial Microorganisms, ed. R.B. Hoover. Vol. 3111. 
1997. 226-237.
3.            Huebner, W.E. and D.C. Boice, Origins of Life and Evolution of 
the Biosphere, 1992. 21(5-6): p. 299-315.
4.            Altwegg, K., et al., Science Advances, 2016. 2(5).

A szemináriumon minden érdeklődőt szívesen látunk.
Az előadás az alábbi link segítségével online is meghallgatható:
https://teams.microsoft.com/l/meetup-join/19%3ameeting_NmM1MTFiYmYtYzQ2Ny00ZmVkLWE0NDItMGMyZjExNTdmM2Y3%40thread.v2/0?context=%7B%22Tid%22%3A%22b207389a-c5cb-4cb0-a1ad-227b94e96448%22%2C%22Oid%22%3A%22c993efcb-59ae-4652-9f68-d7a313727128%22%2C%22IsBroadcastMeeting%22%3Atrue%2C%22role%22%3A%22a%22%7D&btype=a&role=a


Üdvözlettel:

ZIMÁNYINÉ HORVÁTH Vera
Látogatóközpont-vezető
Tel: +36 70 491 14 12
Email: vera.horvath AT eli-alps.hu<mailto:vera.horvath AT eli-alps.hu>

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