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Scopus Author ID: 57208177660

Countries

Spain, Greece

Biography

A highly motivated researcher specializing in Cosmology and Astrophysics. I am proficient in the theoretical and numerical exploration of cosmological models, including cosmological parameter inference using various well-known MCMC software. I have worked on several aspects of the Hubble and S8 tensions. Part of the Euclid and LVK collaborations. I would describe myself as a fast learner and an excellent collaborator.

Activities

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Employment (1)

Instituto de Física Teórica (IFT), UAM-CSIC: Madrid, ES

2022 to present | Postdoctoral Researcher
Employment
Source: Self-asserted source
George Alestas

Education and qualifications (3)

University of Ioannina: Ioannina, GR

2018 to 2022 | Phd in Cosmology (Physics)
Education
Source: Self-asserted source
George Alestas

University of Patras: Patra, GR

2015 to 2017 | MSc in Theoretical Physics (Physics)
Education
Source: Self-asserted source
George Alestas

University of Patras: Patra, GR

2010 to 2014 | BSc in Physics (Physics)
Education
Source: Self-asserted source
George Alestas

Professional activities (2)

American Physical Society: College Park, Maryland, US

2021 to present | Student Member
Membership
Source: Self-asserted source
George Alestas

Hellenic Society on Relativity, Gravitation and Cosmology: Thessaloniki, GR

2020 to present | Junior member
Membership
Source: Self-asserted source
George Alestas

Funding (2)

The study of cosmological, modified gravity theories with the aid of Monte Carlo - Markov chain simulations running in high performance computing clusters, using the MontePython/Class and COSMOMC/CAMB computational packages

2021-09 to 2022-09 | Grant
European Social Fund (Athens, GR)
GRANT_NUMBER:

MIS: 5047222
Source: Self-asserted source
George Alestas

Scalar Fields in Curved Spacetimes: Solition solutions, obsevational results and gravitational waves

2020-02 to 2021-05 | Grant
European Social Fund (Athens, GR)
GRANT_NUMBER:

MIS 5047648
Source: Self-asserted source
George Alestas

Works (17)

Enhancing Cosmological Model Selection with Interpretable Machine Learning

Physical Review Letters
2025-01-31 | Journal article
DOI: 10.1103/PhysRevLett.134.041002
Contributors: Indira Ocampo; George Alestas; Savvas Nesseris; Domenico Sapone
Source: check_circle
Crossref
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Preferred source (of 2)‎

Is curvature-assisted quintessence observationally viable?

Physical Review D
2024-11-19 | Journal article
DOI: 10.1103/PhysRevD.110.106010
Contributors: George Alestas; Matilda Delgado; Ignacio Ruiz; Yashar Akrami; Miguel Montero; Savvas Nesseris
Source: check_circle
Crossref
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Preferred source (of 2)‎

Applying the Viterbi algorithm to planetary-mass black hole searches

Phys.Rev.D
2024-06-07 | Journal article | Author
DOI: 10.1103/PhysRevD.109.123516
OTHER-ID: 2743285
ARXIV: 2401.02314
Contributors: George Alestas; Gonzalo Morrás; Yamamoto, Takahiro S.; Juan Garcia-Bellido; Kuroyanagi, Sachiko; Nesseris, Savvas
Source: check_circle
INSPIRE-HEP
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Machine learning constraints on deviations from general relativity from the large scale structure of the Universe

Phys.Rev.D
2022-11-15 | Journal article
DOI: 10.1103/PhysRevD.106.103519
OTHER-ID: 2156729
ARXIV: 2209.12799
Contributors: Alestas, George; Kazantzidis, Lavrentios; Nesseris, Savvas
Source: check_circle
INSPIRE-HEP
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Constraining a late time transition of G$_{eff}$ using low-z galaxy survey data

Phys.Rev.D
2022-07-15 | Journal article
DOI: 10.1103/PhysRevD.106.023526
OTHER-ID: 2011931
ARXIV: 2201.05846
Contributors: Alestas, G.; Perivolaropoulos, L.; Tanidis, K.
Source: check_circle
INSPIRE-HEP
grade
Preferred source (of 4)‎

Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies

JHEAp
2022-04-15 | Journal article
DOI: 10.1016/j.jheap.2022.04.002
OTHER-ID: 2050441
ARXIV: 2203.06142
Contributors: Abdalla, Elcio; Franco Abellán, Guillermo; Aboubrahim, Amin; Agnello, Adriano; Akarsu, Ozgur; Akrami, Yashar; Alestas, George; Aloni, Daniel; Amendola, Luca; Anchordoqui, Luis A. et al.
Source: check_circle
INSPIRE-HEP
grade
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Late-transition versus smooth H(z) -deformation models for the resolution of the Hubble crisis

Physical Review D
2022-03-29 | Journal article
DOI: 10.1103/PhysRevD.105.063538
Contributors: George Alestas; David Camarena; Eleonora Di Valentino; Lavrentios Kazantzidis; Valerio Marra; Savvas Nesseris; Leandros Perivolaropoulos
Source: check_circle
Crossref
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Hints for a Gravitational Transition in Tully–Fisher Data

Universe
2021-09-29 | Journal article | Author
DOI: 10.3390/universe7100366
OTHER-ID: 1861377
ARXIV: 2104.14481
Contributors: George Alestas; Ioannis Antoniou; Leandros Perivolaropoulos
Source: check_circle
INSPIRE-HEP
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Late-time approaches to the Hubble tension deforming H(z), worsen the growth tension

Monthly Notices of the Royal Astronomical Society
2021-05-11 | Journal article
DOI: 10.1093/mnras/stab1070
Contributors: George Alestas; Leandros Perivolaropoulos
Source: check_circle
Crossref
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$w-M$ phantom transition at $z_t$ <0.1 as a resolution of the Hubble tension

Phys.Rev.D
2021-04-22 | Journal article
DOI: 10.1103/PhysRevD.103.083517
OTHER-ID: 1838618
ARXIV: 2012.13932
Contributors: Alestas, George; Kazantzidis, Lavrentios; Perivolaropoulos, Leandros
Source: check_circle
INSPIRE-HEP
grade
Preferred source (of 3)‎

An Overview of Nonstandard Signals in Cosmological Data

2021-02-25 | Conference paper
DOI: 10.3390/ECU2021-09333
Contributors: George Alestas; George V. Kraniotis; Leandros Perivolaropoulos
Source: check_circle
Crossref

Stable, Spherical and Thin Fluid Shells

2021-02-24 | Conference paper
DOI: 10.3390/ECU2021-09332
Contributors: George Alestas; George V. Kraniotis; Leandros Perivolaropoulos
Source: check_circle
Crossref

Existence and stability of static spherical fluid shells in a Schwarzschild-Rindler–anti–de Sitter metric

Physical Review D
2020-11-06 | Journal article
DOI: 10.1103/PhysRevD.102.104015
Contributors: G. Alestas; G. V. Kraniotis; L. Perivolaropoulos
Source: check_circle
Crossref
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Preferred source (of 2)‎

H0 tension, phantom dark energy, and cosmological parameter degeneracies

Physical Review D
2020-06-16 | Journal article
DOI: 10.1103/PhysRevD.101.123516
Contributors: G. Alestas; L. Kazantzidis; L. Perivolaropoulos
Source: check_circle
Crossref
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Preferred source (of 2)‎

Evading Derrick’s theorem in curved space: Static metastable spherical domain wall

Phys.Rev.D
2019-03-21 | Journal article
DOI: 10.1103/PhysRevD.99.064026
OTHER-ID: 1716110
ARXIV: 1901.06659
Contributors: Alestas, G.; Perivolaropoulos, L.
Source: check_circle
INSPIRE-HEP
grade
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Euclid. I. Overview of the Euclid mission

Journal article | Author
OTHER-ID: 2789425
ARXIV: 2405.13491
Contributors: Mellier, Y.; Javier A. Acevedo Barroso; Achúcarro, A.; Julian Adamek; Rémi Adam; Graeme Addison; Nabila Aghanim; Aguena, M.; Virginia Ajani; Yashar Akrami et al.
Source: check_circle
INSPIRE-HEP

ΛCDM and the Implications of the Hubble Tension

Dissertation or Thesis
DOI: 10.12681/eadd/51881
OTHER-ID: 2128345
Contributors: Alestas, George
Source: check_circle
INSPIRE-HEP
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