ELFT HÍRADÓ

[StatFizSzeminar <statfiz AT glu.elte.hu>]

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           ELTE TTK Fizikai Intézet
       STATISZTIKUS FIZIKAI SZEMINÁRIUM


             2019. november 13.

                   szerda 

                   11.00

                Tamács Kovács

   ELTE Department of Theoretical Physics


     "Exoplanetary mass constraints based
      on topology of interacting networks"
 

The continuously increasing number of newly 
discovered worlds outside of our own solar 
system requires as precise as possible parameter
estimations such as planetary masses, orbital
characteristics, bulk density, etc. Comprehensive
statistical methods and inverse dynamical 
analyses have been worked out to obtain 
system parameters from astronomical observations.
Nevertheless, the time domain measurements as 
scalar time series transformed into complex 
networks serve a powerful tool to investigate
dynamical systems via network topology. Many 
recent works make significant effort to explore
the causality relations and coupling directions
between connected dynamical systems.

In this talk a new estimation procedure of 
planetary masses is presented making use of 
eclipse time variation in multi-planetary 
systems. Due to the gravitational coupling 
the motion of planets differs from pure 
Keplerian ellipse resulting in variable 
orbital periods. Measuring this tiny effect
for nearly co-planar planets one is able to
reconstruct the trajectories sharing the same
phase space. Transforming then the obtained
state vectors of the entangled dynamical systems
into network representation, it can be shown 
that the coupling directions between the 
interacting sub-networks are related to 
planetary masses relative to each other.


1117, Budapest, Pázmány P. sétány 1/A, Északi tömb 2.54
        honlap: http://glu.elte.hu/~statfiz

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