[institut] [aa] Seminar Katedre za astronomiju - 02. jun 2015.

[Nikola Veselinovic]

Seminar iz astronomije i astrofizike

                                 Zarija Lukic

                   (Lawrence Berkeley National Laboratory)

         "Studying the evolution of the Universe with quasar spectra"

           utorak, 02. jun 2015. godine, u 18 sati, u ucionici 809,na 
Matematičkom fakultetu u Beogradu.



Dodatak glavnom predavanju: Identifying materials using cosmic rays, 
and
the application on damaged cores at Fukushima power plant


Apstrakt:

The Lyman-alpha forest in spectra of distant quasars is the main tracer 
of
cosmological structure at high redshifts, 2<z<5, and is accessible to
current (BOSS/eBOSS) and future (DESI) spectroscopic sky surveys. On
large-scales, the Ly-a power spectrum can be used as a standard ruler,
measuring the scale of Baryon acoustic oscillations (BAO). On
small-scales, the Ly-a forest enables constraining neutrino masses, and
more generally opens an additional window into the nature of dark 
matter.
Extracting precision cosmology information from the forest statistics
amounts to solving inverse problem, i.e. running accurate simulations 
for
a large number of different cosmologies, which are to be compared 
against
the observations. I will present latest BOSS results, as well as Nyx 
code
we have build to efficiently run Lyman-alpha forest simulations on
massively parallel computers.

In addition, a separate topic on identifying materials using cosmic 
rays and
its application on damaged cores at Fukushima power plant will also be
discussed.

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