Sergey Yurchenko
@trovemaster.bsky.social
64 followers 37 following 410 posts
Physics prof at UCL applying quantum mechanics to study atmospheres of extrasolar planets.
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trovemaster.bsky.social
Eibeberger-Arias: The method goes amazing advantages but difficult because it requires accurate control of the system .
#HRMS2025
trovemaster.bsky.social
Eibeberger-Arias: This change of direction can be accessed via the triple product of 3 dipole components (AxB)xC
#HRMS2025
trovemaster.bsky.social
Eibeberger-Arias: This slide shows how the very cool experiment of 3-wave mixing works. It can sample relative orientation of the molecular dipole components, which are different for two enantiomers , or two mirror images of the molecule
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trovemaster.bsky.social
Sandra Eibeberger-Arias: Coherent control of chaliral molecules.
In this talk using the 3-wave mixingethod
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trovemaster.bsky.social
Can you find RyBr in this photo? 😉

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trovemaster.bsky.social
Brady: result is that for high temperatures the photodissociation rates do depend on temperature
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trovemaster.bsky.social
Brady: we use the dissociation efficiency defined as ratio of lifetimes to obtain the photodissociation part of the cross sections
#HRMSs2025
trovemaster.bsky.social
Brady: here is the result as a mixture of continuum and quasi bound
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trovemaster.bsky.social
Brady: we study CH, taking the curves form a recent publication and use the Duo feature of expectation value of a bond length to separate continuum from bound states
#HRMSs2025
trovemaster.bsky.social
Brady: here is a mir interesting dissociation to a quasibound state
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trovemaster.bsky.social
Brady: we use Duo and solve for the continuum using bound state basis set, here is dissociation type 1
#HRMSs2025
trovemaster.bsky.social
Brady: the problem is that there is no Temperature dependence in the data , but we should expect to be important
#HRMS202t
trovemaster.bsky.social
CH molecule
Ryan Brady: Speaking about temperature dependence of photodissociation of the CH radical
#HRMS2025
trovemaster.bsky.social
Bowesman: using KELT-20b as a case study
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trovemaster.bsky.social
Charles Bowesman presenting his new Non-LTE radiative transfer code TIRAMISU. Because NLTE is important
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trovemaster.bsky.social
Helgi Hrodmarsson: C70+ , high Res spectroscopy for DIB studies.
It is a potential DIB candidate

#HRMS2025
trovemaster.bsky.social
Sandra Brueken: These data led to a detection of CCH+ in ISM
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Sandra also advertised a conference she is organising
trovemaster.bsky.social
Brueken: beautiful measurements of C2H+
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trovemaster.bsky.social
C2H+ ion by Sandra Brueken
Experimental study. This is linear Renner-Teller system
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trovemaster.bsky.social
SiC+ from a talk by Kai Pollow' experiment ,
Wants to find it in space with JWST 12 um or with UV
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trovemaster.bsky.social
Spezzano: some recent detections of isotopic fractionation using different instruments did not agree
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trovemaster.bsky.social
Spezzano: we now do spectroscopic measurements of the qey species for exoplanetary atmospheres including broadening of SO2, CO2 by H2 and He.
#HRMS2025
trovemaster.bsky.social
Spezzano: talking about the exoplanets the astochemistry it is a complex problem (nice slide)
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trovemaster.bsky.social
Spezzano: deuteratuin fraction in oxysen and sulful species is different which is not understood
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trovemaster.bsky.social
Spezzano: here is the first detection of CHD2CHO
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