marie-hélène le ny |
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photographist |
I
am part of the National body of Astronomers and Physicists (Corps
national des Astronomes et Physiciens), as an assistant astronomer
at Montpellier University. I maintain a database of stellar spectra
as a duty for the French astronomical community. As a keen stellar
physicist, my research activity consists in stellar modelling.
I explore the impact of the transport processes of matter in
stars, that bring up to the stellar surface the chemical elements
synthesized in the stellar cores and that will be eventually
ejected into the interstellar medium. A large part of the complex
matter known in the Universe is made of elements that have been
synthesized in stars. I compute stellar evolution tracks and
use them to make predictions that are then compared to observations
- of the Sun, as well as other stars both in our Galaxy and in
other galaxies.
Asteroseismology is a
trending observational technique in the recent years.
Observing the vibrations of stars gives us insight on their internal
structure. The analysis of stellar pulsations gives information
on how the sound waves propagate inside a star and thus on its
internal composition. The propagation of acoustic waves differs
according to the state and composition of the medium, and can
thus give valuable insight on the characteristics of this medium. |
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Ana Palacios, Assistant astronomer, Laboratory Universe & Particles of Montpellier |
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