Anastasios Avgoustidis

Contact

• workRoom A113c Centre for Astronomy & Particle Theory
  University Park
  Nottingham
  NG7 2RD
  UK
• work0115 74 84056
• Anastasios.Avgoustidis@nottingham.ac.uk

Research Summary

My research interests lie in theoretical cosmology and the interplay between fundamental theory and astrophysical observations. In particular:

• Developing models of the early Universe from fundamental theory, and deriving their phenomenological predictions

• Modelling the evolution of the Universe through intermediate times, with emphasis on the connections between high-energy physics and low-energy phenomenology

• Using observational data to constrain cosmological and microphysical parameters, and quantifying their implications for fundamental physics

• Studying physical processes relevant to the early universe trhough analogue (fluid and superfluid) experiments

Selected Publications

• AVGOUSTIDIS, A., GENOVA-SANTOS, R. T., LUZZI, G. and MARTINS, C. J. A. P., 2016. Subpercent constraints on the cosmological temperature evolution PHYSICAL REVIEW D. 93(4),
• AVGOUSTIDIS, ANASTASIOS, POURTSIDOU, ALKISTIS and SAKELLARIADOU, MAIRI, 2015. Zipping and unzipping in string networks: Dynamics of Y-junctions PHYSICAL REVIEW D. 91(2),
• AVGOUSTIDIS, ANASTASIOS, COPELAND, EDMUND J., MOSS, ADAM and SKLIROS, DIMITRI, 2012. Fast analytic computation of cosmic string power spectra PHYSICAL REVIEW D. 86(12),
• AVGOUSTIDIS, ANASTASIOS, CREMONINI, SERA, DAVIS, ANNE-CHRISTINE, RIBEIRO, RAQUEL H., TURZYNSKI, KRZYSZTOF and OTHERS, 2012. The Importance of Slow-roll Corrections During Multi-field Inflation JCAP. 1202, 038

• View all publications

• LOPEZ-EIGUREN, A., URRESTILLA, J., ACHUCARRO, A., AVGOUSTIDIS, A. and MARTINS, C. J. A. P., 2017. Evolution of semilocal string networks. II. Velocity estimators PHYSICAL REVIEW D. 96(2),
• MARTINS, C. J. A. P., RYBAK, I. YU., AVGOUSTIDIS, A. and SHELLARD, E. P. S., 2016. Extending the velocity-dependent one-scale model for domain walls PHYSICAL REVIEW D. 93(4),
• AVGOUSTIDIS, A., GENOVA-SANTOS, R. T., LUZZI, G. and MARTINS, C. J. A. P., 2016. Subpercent constraints on the cosmological temperature evolution PHYSICAL REVIEW D. 93(4),
• CHARNOCK, TOM, AVGOUSTIDIS, ANASTASIOS, COPELAND, EDMUND J. and MOSS, ADAM, 2016. CMB constraints on cosmic strings and superstrings PHYSICAL REVIEW D. 93(12),
• MARTINS, C. J. A. P., RYBAK, I. YU., AVGOUSTIDIS, A. and SHELLARD, E. P. S., 2016. Stretching and Kibble scaling regimes for Hubble-damped defect networks PHYSICAL REVIEW D. 94(11),
• LIAO, KAI, AVGOUSTIDIS, A. and LI, ZHENGXIANG, 2015. Is the Universe transparent? PHYSICAL REVIEW D. 92(12),
• AVGOUSTIDIS, ANASTASIOS, POURTSIDOU, ALKISTIS and SAKELLARIADOU, MAIRI, 2015. Zipping and unzipping in string networks: Dynamics of Y-junctions PHYSICAL REVIEW D. 91(2),
• AVGOUSTIDIS, A., MARTINS, C. J. A. P., MONTEIRO, A. M. R. V. L., VIELZEUF, P. E. and LUZZI, G., 2014. Cosmological effects of scalar-photon couplings: dark energy and varying-alpha Models JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS.
• ACHUCARRO, A., AVGOUSTIDIS, A., LEITE, A. M. M., LOPEZ-EIGUREN, A., MARTINS, C. J. A. P., NUNES, A. S. and URRESTILLA, J., 2014. Evolution of semilocal string networks: Large-scale properties PHYSICAL REVIEW D. 89(6),
• AVGOUSTIDIS, ANASTASIOS, CREMONINI, SERA, DAVIS, ANNE-CHRISTINE, RIBEIRO, RAQUEL H., TURZYNSKI, KRZYSZTOF and OTHERS, 2012. The Importance of Slow-roll Corrections During Multi-field Inflation JCAP. 1202, 038
• AVGOUSTIDIS, ANASTASIOS, COPELAND, EDMUND J., MOSS, ADAM and SKLIROS, DIMITRI, 2012. Fast analytic computation of cosmic string power spectra PHYSICAL REVIEW D. 86(12),
• AVGOUSTIDIS, ANASTASIOS, 2011. New Cosmological Constraints on Axions and Axion-Like Particles RECENT DEVELOPMENTS IN GRAVITY (NEB XIV). 283,
• AVGOUSTIDIS, A., BURRAGE, C., REDONDO, J., VERDE, L. and JIMENEZ, R., 2010. Constraints on cosmic opacity and beyond the standard model physics from cosmological distance measurements Journal of Cosmology and Astroparticle Physics. 2010(10), 024
• AVGOUSTIDIS, A. and COPELAND, E.J., 2010. Effect of kinematic constraints on multitension string network evolution Physical Review D. 81(6), 063517
• AVGOUSTIDIS, A., VERDE, L. and JIMENEZ, R., 2009. Consistency among distance measurements: transparency, BAO scale and accelerated expansion Journal of Cosmology and Astroparticle Physics. 2009(6), 012
• AVGOUSTIDIS, A. and ZAVALA, I., 2009. Warped Wilson Line DBI Inflation JCAP. 0901, 045
• AVGOUSTIDIS, ANASTASIOS, 2009. Consistency checks in the ACDM: transparency, BAO scale and Lambda-domination NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS. 194, 173-177
• AVGOUSTIDIS, A. and SHELLARD, E.P.S., 2008. Velocity-dependent models for non-Abelian/entangled string networks Physical Review D. 78(10), 103510
• AVGOUSTIDIS, A. and GOMIS, JOAQUIM, Non-relativistic strings in expanding spacetime CLASSICAL AND QUANTUM GRAVITY. 25(12),
• AVGOUSTIDIS, A., CREMADES, D. and QUEVEDO, F., Wilson line inflation GENERAL RELATIVITY AND GRAVITATION. 39(8), 1203-1234
• AVGOUSTIDIS, A., LUZZI, G., MARTINS, C. J. A. P. and MONTEIRO, A. M. R. V. L., Constraints on the CMB temperature-redshift dependence from SZ and distance measurements JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS.
• AVGOUSTIDIS, ANASTASIOS, CREMONINI, SERA, DAVIS, ANNE-CHRISTINE, RIBEIRO, RAQUEL H., TURZYNSKI, KRZYSZTOF and WATSON, SCOTT, Decoupling survives inflation: a critical look at effective field theory violations during inflation JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS.
• AVGOUSTIDIS, A and SHELLARD, EPS, Effect of reconnection probability on cosmic (super)string network density PHYSICAL REVIEW D. 73(4),
• AVGOUSTIDIS, A and SHELLARD, EPS, Cosmic string evolution in higher dimensions PHYSICAL REVIEW D. 71(12),
• AVGOUSTIDIS, A., Cosmic string dynamics and evolution in warped spacetime PHYSICAL REVIEW D. 78(2),
• OLIVEIRA, M. F., AVGOUSTIDIS, A. and MARTINS, C. J. A. P., Cosmic string evolution with a conserved charge PHYSICAL REVIEW D. 85(8),
• AVGOUSTIDIS, A and SHELLARD, EPS, Cycloops: dark matter or a monopole problem for brane inflation? JOURNAL OF HIGH ENERGY PHYSICS.
• POURTSIDOU, A., AVGOUSTIDIS, A., COPELAND, E. J., POGOSIAN, L. and STEER, D. A., Scaling configurations of cosmic superstring networks and their cosmological implications PHYSICAL REVIEW D. 83(6),
• AVGOUSTIDIS, ANASTASIOS, CHADBURN, SARAH and GREGORY, RUTH, Cosmic superstring trajectories in warped compactifications PHYSICAL REVIEW D. 86(6),
• AVGOUSTIDIS, ANASTASIOS, JIMENEZ, RAUL, ALVAREZ-GAUME, LUIS and VAZQUEZ-MOZO, MIGUEL A., GRAVITATIONAL SHOCKS AS A KEY INGREDIENT OF GAMMA-RAY BURSTS INTERNATIONAL JOURNAL OF MODERN PHYSICS A. 27(20),
• NUNES, A. S., AVGOUSTIDIS, A., MARTINS, C. J. A. P. and URRESTILLA, J., Analytic models for the evolution of semilocal string networks PHYSICAL REVIEW D. 84(6),
• AVGOUSTIDIS, A. and SHELLARD, E. P. S., Velocity-dependent models for non-Abelian/entangled string networks (vol 78, 103510, 2008) PHYSICAL REVIEW D. 80(12),
• AVGOUSTIDIS, A, LOTHIAN, RM, BROMAGE, BJI and WALSH, RW, Modelling the magnetic field of a flaring active region PROCEEDINGS OF THE SOHO 11 SYMPOSIUM ON FROM SOLAR MIN TO MAX: HALF A SOLAR CYCLE WITH SOHO. 508, 431-434