Events
SEMINAR
Tuesday
15 May 2012
Kostas Tziotziou
Research Center for Astronomy and Applied Mathematics of the Academy of Athens
A new way of inferring magnetic energy and helicity in solar active regions
read more...
In Press...
A generalized growth index parametrization: Applications to the LamdaCDM using the WiggleZ growth data
Basilakos, S.
Order in de Broglie - Bohm Quantum Mechanics
Contopoulos, G., Delis, N., and Efthymiopoulos, C.
(To appear in J. Phys. A.: Math. Theor. pp 1-23)
On Our Ability to Predict Major Solar Flares
Georgoulis, M.K.
(To appear in
Astroph. Space Sci. Proc. V. N. Obridko, K. Georgieva, Yu. A. Nagovitsyn, Eds.)
A Consistent Comparison of Bias Models using Observational Data
A. Papageorgiou, M. Plionis, S. Basilakos, C. Ragone-Figueroa
To appear in MNRAS
Instabilities and stickiness in a 3D rotating galactic potential
M. Katsanikas, P.A. Patsis and G. Contopoulos
(to appear in IJBC)
Quantum Vortices and Trajectories in Particle Diffraction
N. Delis, C. Efthymiopoulos and G. Contopoulos
(to appear in an IJBC Special Issue edited by G. Nicolis, M. Robnik, V. Rothos and H. Skokos)
Dynamics and Constraints of the Massive Gravitons Dark Matter Flat Cosmologies
Basilakos, S., Plionis, M., Alves, M. E. S. and Lima, J. A. S.
Using the Noether symmetry approach to probe the nature of dark energy
Basilakos, S., Tsamparlis, M. and Paliathanasis, A.
Hubble expansion and structure formation in the "running FLRW model" of the cosmic evolution
Grande J., Sola, J., Basilakos S. and Plionis M.
Orbits in a non-Kerr Dynamical System
Contopoulos G., Lukes-Gerakopoulos G. and Apostolatos T.A.
(to appear in IJBC Special Issue edited by G. Nicolis, M. Robnik, V. Rothos and H. Skokos)
Structures out of Chaos in barred-spiral galaxies
Patsis P. A.
(Review paper to be published in IJBC)
Dynamical Mechanisms supporting Barred-Spiral Structures
Patsis P. A.
(AApTr 2012, 27, 113)
Chains of rotational tori and filamentary structures close to high multiplicity periodic orbits in a 3D galactic potential
Katsanikas, M., Patsis P. A. and Pinotsis A.
(IJBC, in press)
The structure and evolution of confined tori near a Hamiltonian Hopf Bifurcation
Katsanikas, M., Patsis P. A. and Contopoulos G.
(IJBC, in press)
The Generalized Uncertainty Principle and Quantum Gravity Phenomenology
Farag Ali, A., Das, S., Vagenas, E.C.
(Proceedings of the Eleventh Marcel Grossmann Meeting on General Relativity - World Scientific - in press)
News & Announcements
Picture of the month
Structures supported by Chaotic Orbits
Models based on orbital theory indicate that the observed structures in disk galaxies (bars and spirals) can be supported by particles in chaotic motion. Here is an example of a model based on a potential estimated from near-infrared observations of the barred-spiral galaxy NGC 1300 (Kalapotharakos et al. 2010, 403, 83).
(a) The effective potential isocontours of the model. We have one stable (L1S) and five unstable (L4, L5, L1, L1', L2) Lagrangian points indicated with arrows. (b) The colour-scaled density response of a stellar disk after imposing this gravitational field. We observe the appearance of a typical grand design barred spiral morphology. The spirals, and to a large extent the "ansae" type bar are supported by particles in chaotic motion. A typical orbit supporting this structure during a time corresponding to ten bar rotation can be seen here (Patsis, Kalapotharakos, Grosbol 2010, MNRAS 408, 22; Patsis 2012, AApTr 27, 113).
View previous Pictures of the Month here...
Astronomy Scholarship opportunity from the Academy of Athens.
For information please read here...
Workshop on "Fundamental Problems in Quantum Physics", NCSR `Demokritos', Wednesday, March 21, 2012
A workshop on "Fundamental Problems in Quantum Physics" will be held at the NCSR 'Demokritos' on Wednesday, March 21, 2012, in the framework of the COST action MP1006. The
workshop is co-organised by C. Efthymiopoulos, who is national representative in the management committee of the COST MP1006 Action.
The program is available here (PDF file)
RCAAM Activities Report for 2011 (in Greek)
Read or download the file here...
Dark Matter Awareness Week 1-8 December 2010
The RCAAM is participating in the Dark Matter Awareness Week 2010 (DMAW2010) initiative organizing a special "Dark Matter in Galaxies" seminar by P.A. Patsis and C. Efthymiopoulos.
Read more here...
