[Alumnes] HOY 13:00hs - Seminario FCAG - Lic. Tobías Canavesi - (FCAG-IFLP-CONICET)

[Secretaría de Ciencia y Técnica]

Estimados,

Les recordamos que en el día de hoy, a las 13:00 hs. en el Salón 
Meridiano, tendremos un Seminario a cargo del Lic. Tobías Canavesi 
(FCAG-IFLP-CONICET) *, el cual **se  titula "Fractal Gravitation ." El 
**resumen del mismo lo pueden leer al final de este mensaje.*

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**Les recordamos, además, que los objetivos de estos seminarios son el 
de generar un espacio ameno y activo de intercambio de ideas, para 
exponer nuestros trabajos y temas de investigación, o bien el de 
aquellos que circunstancialmente nos visitan en nuestra casa de altos 
estudios. Teniendo en cuenta que nuestra institución nuclea una gran 
diversidad de temas de investigación, y distintos estamentos académicos, 
este espacio resulta de vital importancia para conocernos, acercarnos y 
hasta generar posibles colaboraciones. **

*******

**Quedan todos cordialmente invitados y los esperamos 15 minuto**s antes 
con café y galletitas.

**Atentamente,
**

**Secyt-FCAG**
**-------------------------------------------------------------------**

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Título:Fractal Gravitation

Seminario: Lic. Tobias Canavesi (FCAG-IFLP-CONICET)

Resumen: A new effective theory of modified gravity is presented and 
axiomatized. In this theory we start from a generalized Poisson equation 
and proposed a modification physical dimension by a fractal dimension, 
since we find using the data from gaia second release that the stars in 
the Milky Way are distributed in a fractal way, checking what was 
already thought Elmegreen(2000). We tested the model to calculate 
circular velocities for several galaxies including the Milky Way. For 
doing this, two numerical models were used, the first considering 
uniform density and the second more realistic with a bulge and a disc 
proposed by Scelza, G. & Stabile, A.(2015), but without density of dark 
matter, and adapted for our fractal potential. We tested the simplest 
model in 14 low surface brightness galaxies, taken from the work de 
Blok, W. J. G., & Bosma, A. (2002). We use the bulge and disk model for 
the spiral galaxies NGC 300 (SA (s)d), NGC 247 (SAB (s)d), then we make 
a comparison with the adjustment given by Newton's Theory of Universal 
Gravitation.

Finally, we study the case of the Milky Way in a detailed manner, taking 
into account that for it we have more data than for the galaxies 
mentioned above. First we calculated the fractal dimension using the 
box-counting dimension for a around the barycenter of the solar system 
using the data from the second release of gaia and the distances 
calculated by Bailer-Jones, C. A.(2018), for 999997 stars. To conclude, 
we study its validity by contrasting the data for the circular velocity 
of the Milky Way obtained from the works of Huang, Y.(2016) and Pato, 
M., & Iocco, F. (2017).







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