[AAA] Seminario DAS - UChile; Planetary remnants around white dwarfs, Odette Toloza,Núcleo Milenio de Formación Planetaria

[Rene A. Mendez]

Estimado/as

Les recuerdo que el jueves 07 de Octubre a las 10:30AM tendremos 
seminario en el Departamento de Astronomía de la Universidad de Chile.

*****   OJO: HORARIO ESPECIAL, 10:30AM.... <<<<<====== !!!!!

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*Charlista*: Odette Toloza
Núcleo Milenio de Formación Planetaria

*Titulo*: Planetary remnants around white dwarfs


*Resumen*: White dwarfs are the final fate of 95 per cent of all stars, 
including
our Sun. Planets and planetary bodies that survived this
metamorphosis of their host star can venture close to the left-over
stellar cores (i.e. white dwarf) where tidal force results in their
disruption. A debris disc is formed and its material accretes onto the
white dwarf. Observational evidence is widely supporting this framework.
However, the number of systems is very small for statistics and 
population studies,
and hence our efforts with MOS surveys to enlarge the samples.
On the modelling point of view, the chemical composition of the parent 
bodies is
extracted from UV/OPTICAL spectroscopy of white dwarfs. A key 
assumption, and
so far untested, is that the pollution caused by the accreted fragments 
on the white
dwarfs are homogeneous. Here, I will present the current status of what 
we know of these
evolved planetary systems, our progress with MOS SDSS-V survey and a 
test on the
the homogeneity of the the metal distribution using a pulsating white 
dwarf G29-38
Virtual room: 
https://uchile.zoom.us/j/83634313029?pwd=Q0dkYnVGTUtJT2NQK0N1M3pudCsxQT09 
<https://uchile.zoom.us/j/83634313029?pwd=Q0dkYnVGTUtJT2NQK0N1M3pudCsxQT09>

Rene A. Mendez
Seminar Coordinator
DAS/UChile - rmendez en uchile.cl <mailto:rmendez en uchile.cl>

-- 
-- 
Saludos,

Alejandro Leal Obreque
Departamento de Astronomía
FCFM - UNIVERSIDAD DE CHILE
22 977 1154
aleal en das.uchile.cl <mailto:aleal en das.uchile.cl>
www.das.uchile.cl <http://www.das.uchile.cl/>


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