Personal Information
(+30) 26510 - 08451
g.alestas@uoi.gr
alestasg
GeorgeAlestas
Full CV
Personal Website
Research Interests
My main research interests include theoretical and astrophysical aspects of Cosmology, H0 tension, cosmological parameter inference and data analysis, modified gravity theories (extensions of General Relativity) and solitons.Short Curriculum Vitae
Education
2022 – Present Postdoctoral Studies
Instituto de Fisica Teorica (IFT), Universidad Autónoma de Madrid, Spain
2018 – 2022 Ph.D. in Physics
Thesis Title: “ΛCDM and the Implications of the Hubble Tension”
Department of Physics, University of Ioannina
2015 – 2017 Postgraduate Studies (M.Sc.) in Theoretical and Mathematical Physics
Graduated with an overall grade of 8.87/10.00
Department of Physics, University of Patras
2010 – 2014 Bachelor of Science (B.Sc.) in Physics
Department of Physics, University of Patras
Scholarships/Grants
2021 – 2022 Fellow of the Greek State and the European Union (European Social Fund – ESF) through the Operational Programme “Competitiveness, Entrepreneurship and Innovation 2014-2020 (EPAnEK)”
2020 – 2021 Fellow of the Greek State and the European Union (European Social Fund – ESF) through the Operational Programme ”Human Resources Development, Education and Lifelong Learning 2014-2020”
2020 European Cooperation in Science & Technology (COST) grant for a short term scientific mission (STSM) in the context
of the action “CA15117 – Cosmology and Astrophysics Network for Theoretical Advances and Training Actions
(CANTATA)” and the project “Search for Hints of Modified Gravity in Cosmological Data”
Computer Skills
Operating Systems Windows & Linux
Programming Python, C, C++, Fortran
Scientific Software CLASS, MontePython, CAMB, MGCAMB, COSMOMC, MGCOSMOMC, Wolfram Mathematica, LaTeX
Languages
Greek Native
English B2 Level (University of Michigan)
Collaborations
Snowmass2022
Peer Review
Monthly Notices of the Royal Astronomical Society (MNRAS)
Societies
2021 – Present Student Member of the American Physical Society (APS)
2020 – Present Junior Member of the Hellenic Society on Relativity, Gravitation and Cosmology
Publication Record
For the full list of my publications please visit the inspirehep database.
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
E. Di Valentino et al., Contribution to the 2022 Snowmass Summer Study
JHEAp 34 (2022) 49-211
DOI: 10.1016/j.jheap.2022.04.002
Constraining a late time transition of Geff using low-z galaxy survey data
G. Alestas, L. Perivolaropoulos and K. Tanidis
Phys.Rev.D 106 (2022) 2, 023526
DOI: 10.1103/PhysRevD.106.023526, Supplemental Material
Late-transition vs smooth H(z) deformation models for the resolution of the Hubble crisis
G. Alestas, D. Camarena, E. Di Valentino, L. Kazantzidis, V. Marra, S. Nesseris and L. Perivolaropoulos
Phys. Rev. D 105, 063538
DOI: 10.1103/PhysRevD.105.063538, Supplemental Material
Hints for a gravitational constant transition in Tully-Fisher data
G. Alestas, I. Antoniou and L. Perivolaropoulos
Universe 7 (2021) 366
DOI: 10.3390/universe7100366, Supplemental Material
Late time approaches to the Hubble tension deforming H(z), worsen the growth tension
G. Alestas, L. Perivolaropoulos
Mon.Not.Roy.Astron.Soc. 504 (2021) 3, 3956-3962
DOI: 10.1093/mnras/stab1070, Supplemental Material
A w – M phantom transition at zt<0.1 as a resolution of the Hubble tension
G. Alestas, L. Kazantzidis, L. Perivolaropoulos
Phys.Rev.D 103 (2021) 8, 083517
DOI: 10.1103/PhysRevD.103.083517, Supplemental Material
Existence and Stability of Static Spherical Fluid Shells in a Schwarzschild-Rindler-anti-de Sitter Metric
G. Alestas, G.V. Kraniotis, L. Perivolaropoulos
Phys.Rev.D 102 (2020) 10, 104015
DOI: 10.1103/PhysRevD.102.104015, Supplemental Material
H0 tension, phantom dark energy, and cosmological parameter degeneracies
G. Alestas, L. Kazantzidis, L. Perivolaropoulos
Phys.Rev.D 101 (2020) 12, 123516
DOI: 10.1103/PhysRevD.101.123516, Supplemental Material
Evading Derrick’s theorem in curved space: Static metastable spherical domain wall
G. Alestas, L. Perivolaropoulos
Phys.Rev.D 99 (2019) 6, 064026
DOI: 10.1103/PhysRevD.99.064026, Supplemental Material
Experience
Teaching Assistance
Spring Semester 2021 – 22 Classical Electrodynamics II (6th Semester Core Course – 62)
Department of Physics, University of Ioannina, Greece
Winter Semester 2021 – 22 Gravity and General Theory of Relativity (Advanced Undergraduate Elective Course – 106)
Department of Physics, University of Ioannina, Greece
Winter Semester 2021 – 22 Classical Electrodynamics I (5th Semester Core Course – 52)
Department of Physics, University of Ioannina, Greece
Spring Semester 2020 – 21 Cosmology (Advanced Undergraduate Elective Course – 105)
Department of Physics, University of Ioannina, Greece
Winter Semester 2020 – 21 Gravity and General Theory of Relativity (Advanced Undergraduate Elective Course – 106)
Department of Physics, University of Ioannina, Greece
Winter Semester 2019 – 20 Classical Electrodynamics I (5th Semester Core Course – 52)
Department of Physics, University of Ioannina, Greece
Winter Semester 2016 – 17 Astronomy Lab (TAE451)
Department of Physics, University of Patras, Greece
Spring Semester 2016 – 17 Astrophysics Lab (TAE450)
Department of Physics, University of Patras, Greece
