Sergey Yurchenko
@trovemaster.bsky.social
Physics prof at UCL applying quantum mechanics to study atmospheres of extrasolar planets.
Zuckerman: mysteries of WD to be understood , Ben wants the audience to read
October 15, 2025 at 3:57 PM
Zuckerman: mysteries of WD to be understood , Ben wants the audience to read
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
October 15, 2025 at 3:55 PM
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
Zuckerman: periodic table of elements discovery around WD , i.e. from accredited material
October 15, 2025 at 3:53 PM
Zuckerman: periodic table of elements discovery around WD , i.e. from accredited material
Zuckerman: history of elements discovery from accredited material with Li and Be the most recent
October 15, 2025 at 3:51 PM
Zuckerman: history of elements discovery from accredited material with Li and Be the most recent
Zuckerman: Fe line in two cases that.ust have elongated gas discs to have such broadening .
October 15, 2025 at 3:48 PM
Zuckerman: Fe line in two cases that.ust have elongated gas discs to have such broadening .
Zuckerman: something like that happened ? 😲
October 15, 2025 at 3:41 PM
Zuckerman: something like that happened ? 😲
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
Best agreement is with Earth like mixture of 30 % crust and 70% mantle
October 15, 2025 at 3:40 PM
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
Best agreement is with Earth like mixture of 30 % crust and 70% mantle
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.
October 15, 2025 at 3:36 PM
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.
Zuckerman: the composition of rocky planets orbiting WDs is amazingly similar to the Earth
October 15, 2025 at 3:33 PM
Zuckerman: the composition of rocky planets orbiting WDs is amazingly similar to the Earth
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.
Important is that we learned the composition is very similar to Earth . Can we now answer Q if Earth is normal.
October 15, 2025 at 3:31 PM
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.
Important is that we learned the composition is very similar to Earth . Can we now answer Q if Earth is normal.
Zuckerman: typical spectra of WD
October 15, 2025 at 3:28 PM
Zuckerman: typical spectra of WD
Zuckerman: typical WD system
October 15, 2025 at 3:27 PM
Zuckerman: typical WD system
Zuckerman: a nickel history of pollution of dwarfs by accretion from surroundings
October 15, 2025 at 3:23 PM
Zuckerman: a nickel history of pollution of dwarfs by accretion from surroundings
Zuckerman: here is another recent evidence
October 15, 2025 at 3:21 PM
Zuckerman: here is another recent evidence
Zuckerman: two absorption lines are the first observation evidence of planet around a WD from 1917
October 15, 2025 at 3:20 PM
Zuckerman: two absorption lines are the first observation evidence of planet around a WD from 1917
Zuckerman: the only reasonable application is comets
October 15, 2025 at 3:19 PM
Zuckerman: the only reasonable application is comets
Zuckerman: WD heavy elements should be cleansed but they show up anyway, they must be coming from a different source
October 15, 2025 at 3:17 PM
Zuckerman: WD heavy elements should be cleansed but they show up anyway, they must be coming from a different source
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”
October 15, 2025 at 3:10 PM
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”
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
#HRMS2025
August 29, 2025 at 9:13 AM
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
#HRMS2025
August 27, 2025 at 9:41 AM
Brady: we use the dissociation efficiency defined as ratio of lifetimes to obtain the photodissociation part of the cross sections
#HRMSs2025
#HRMSs2025
August 27, 2025 at 9:30 AM
Brady: we use the dissociation efficiency defined as ratio of lifetimes to obtain the photodissociation part of the cross sections
#HRMSs2025
#HRMSs2025