iiinova — where your digital self keeps evolving

Sergey Yurchenko @trovemaster.bsky.social · 15/12/2025

We are lucky to host Professor Suzanne Aigrain at UCL with an Astro group seminar “Finding and characterising nearby Earth analogues with PLATO and the Terra Hunting Experiment”.

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: mysteries of WD to be understood , Ben wants the audience to read

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: here is a mistery of Be in WD. I'm order to have such spectrum the abundance of Be must be 100000s times larger than in any astronomical objects

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: periodic table of elements discovery around WD , i.e. from accredited material

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: history of elements discovery from accredited material with Li and Be the most recent

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: Fe line in two cases that.ust have elongated gas discs to have such broadening .

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: something like that happened ? 😲

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

The most abundant elements on Earth are O, Si, Al. Here is a WD spectrum. This is unusual containing Al. Best agreement is with Earth like mixture of 30 % crust and 70% mantle

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: rocky composition, Oxides . As we speak the WD community debates if asteroids around WD are wet or dry. Ben is not involved in these debates.

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: the composition of rocky planets orbiting WDs is amazingly similar to the Earth

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: WD spectroscopy enables measurement of the bulk composition of accreted objects. Important is that we learned the composition is very similar to Earth . Can we now answer Q if Earth is normal.

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: typical spectra of WD

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: a nickel history of pollution of dwarfs by accretion from surroundings

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: here is another recent evidence

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: two absorption lines are the first observation evidence of planet around a WD from 1917

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: the only reasonable application is comets

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Zuckerman: WD heavy elements should be cleansed but they show up anyway, they must be coming from a different source

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Sergey Yurchenko @trovemaster.bsky.social · 15/10/2025

Ben Zuckerman (UCLA), who will be passing through London is giving a seminar at UCL on “The nature of rocky exoplanets via study of white dwarf stars”

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Sergey Yurchenko @trovemaster.bsky.social · 29/08/2025

Eibeberger-Arias: The method goes amazing advantages but difficult because it requires accurate control of the system . #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 29/08/2025

Eibeberger-Arias: This change of direction can be accessed via the triple product of 3 dipole components (AxB)xC #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 29/08/2025

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 #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 29/08/2025

Sandra Eibeberger-Arias: Coherent control of chaliral molecules. In this talk using the 3-wave mixingethod #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Can you find RyBr in this photo? 😉 #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Brady: result is that for high temperatures the photodissociation rates do depend on temperature #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Brady: we use the dissociation efficiency defined as ratio of lifetimes to obtain the photodissociation part of the cross sections #HRMSs2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Brady: here is the result as a mixture of continuum and quasi bound #HRMSs2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

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

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Brady: here is a mir interesting dissociation to a quasibound state #HRMSs2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Brady: we use Duo and solve for the continuum using bound state basis set, here is dissociation type 1 #HRMSs2025

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

Brady: the problem is that there is no Temperature dependence in the data , but we should expect to be important #HRMS202t

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Sergey Yurchenko @trovemaster.bsky.social · 27/08/2025

CH molecule Ryan Brady: Speaking about temperature dependence of photodissociation of the CH radical #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Bowesman: using KELT-20b as a case study #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Charles Bowesman presenting his new Non-LTE radiative transfer code TIRAMISU. Because NLTE is important #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Helgi Hrodmarsson: C70+ , high Res spectroscopy for DIB studies. It is a potential DIB candidate #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Sandra Brueken: These data led to a detection of CCH+ in ISM #HRMS2025 Sandra also advertised a conference she is organising

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Brueken: beautiful measurements of C2H+ #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

C2H+ ion by Sandra Brueken Experimental study. This is linear Renner-Teller system #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

SiC+ from a talk by Kai Pollow' experiment , Wants to find it in space with JWST 12 um or with UV #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: some recent detections of isotopic fractionation using different instruments did not agree #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: we now do spectroscopic measurements of the qey species for exoplanetary atmospheres including broadening of SO2, CO2 by H2 and He. #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: talking about the exoplanets the astochemistry it is a complex problem (nice slide) #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: deuteratuin fraction in oxysen and sulful species is different which is not understood #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: here is the first detection of CHD2CHO #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: Let's talk about D-COMs, deuterated complex organic molecules. 5 atoms is already complicated! S, Methanol is a COM. #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Spezzano: one interesting question is which molecules are inherited by planets from ISM. Isotopic fractionation can be very complicated but it is important to answer this question #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

Silvia Spezzano: Max High-resolution spectroscopy of molecules of astrophysical importance. 325 molecules have been detected in ISM and we have not reached plateau #HRMS2025

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Sergey Yurchenko @trovemaster.bsky.social · 25/08/2025

CO electronic spectra and CO+, two posters

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