Astroparticle Physics and Cosmology

Theory Division, Department of Physical Sciences, University of Helsinki

Astroparticle physics and cosmology are vital and growing disciplines at the borderline of particle physics and astrophysics.
The subject of their study are the properties of the universe and matter under extreme conditions.
This image by WMAP is from the NASA LAMBDA archive


Finnish Cosmology Portal Links to Finnish institutes involved in cosmological research.
Planck collaboration at the University of Helsinki
The Theory programme and The Cosmology project of the Helsinki Institute of Physics
The High Energy / Cosmology seminar, which takes place on Fridays is organized by Vappu Reijonen.
A related group at the Theory Division is the Field Theory at Finite Temperature and Density group.

Those interested in making their MSc thesis about cosmology, please contact
     Kari Enqvist, Hannu Kurki-Suonio or Kari Rummukainen.

Recent and upcoming activities


The weekly meetings of the group Wednesdays at 2 P.M. in the HIP meeting room
    

Personnel of the group and their fields of interest:

Kari Enqvist, professor: Finite T field theory, magnetic fields in the early universe, electroweak phase transitions,
     neutrino cosmology, Planck Surveyor Mission (Academy of Finland).
Kari Rummukainen, professor: Quantum field theory, numerical simulations, cosmology.
Keijo Kajantie, professor emeritus: Ultrarelativistic nuclear collisions, finite T field theory, cosmological phase transitions.
Esko Keski-Vakkuri, docent: String theory and cosmology.
Hannu Kurki-Suonio, docent: Phase transitions in the early universe; Planck Surveyor Mission.
Diana Battefeld, PhD
Elina Keihänen, PhD: Primordial nucleosynthesis, Planck Surveyor Mission.
Torsti Poutanen, PhD: CMB data analysis.
Gerasimos Rigopoulos, PhD
Anders Tranberg, PhD
Andrea Ferrantelli, graduate student: Dark matter and supersymmetry.
Maria Mattsson, graduate student: Inhomogeneous cosmological models
Vappu Reijonen, graduate student: Dark energy, modified gravity
Matti Savelainen, graduate student: CMB analysis.
Olli Taanila, graduate student: Inflation and baryogenesis
Marianne Talvitie, graduate student: CMB data analysis
Anna-Stiina Sirviö, undergraduate student: CMB analysis.

Click here for Theoretical Physics teaching personnel.

Related networks:
UniverseNet

For an up-to-date info on cosmology or astroparticle conferences and workshops
see the forum "Conferences and meetings" at CosmoCoffee.info.

Additional personnel:

The following persons, even though not formally affiliated with the theory division,
have strong links with the group and carry out research on the field of astroparticle physics and cosmology.

Kari J. Eskola (U. of Jyväskylä), Kimmo Kainulainen (U. of Jyväskylä), Reijo Keskitalo (Jet Propulsion Laboratory), Mikko Laine (U. of Bielefeld), Jukka Maalampi (U. of Jyväskylä), Teppo Mattsson (U. of Canterbury), Lotta Mether (U. of Bielefeld), Sami Nurmi (U. of Heidelberg), Arttu Rajantie (U. of Cambridge), Matts Roos (U. of Helsinki). Syksy Räsänen (U. of Geneva), Jussi Väliviita (U. of Oslo)

Recent PhDs from the group:

Reijo Keskitalo (2009): "Measuring the Cosmic Microwave Background : Topics along the analysis pipeline"
Teppo Mattsson (2009): "Acceleration of the Cosmological Expansion as an Effect of Inhomogeneities"
Diana Battefeld (2008): "Non-Gaussianity and preheating from N-flation and magnetogenesis via rotating cosmic string loops"
Vesa Muhonen (2008): "Primordial isocurvature perturbation in light of CMB and LSS data"
Sami Nurmi (2008): "Aspects of Inflationary Models at Low Energy Scales"
Tomi Koivisto (2006): "Formation of structure in dark energy cosmologies"
Antti Väihkönen (2006): "Non-Gaussian Cosmological Perturbations from Hybrid Inflation and Preheating"
Torsti Poutanen (2005): "Map-Making and Power Spectrum Estimation for Cosmic Microwave Background Temperature Anisotropies"
Jussi Väliviita (2005): "The Nature of Primordial Perturbations in Light of CMB Observations"
Samuli Hemming (2004): "Aspects of Quantum Fields and Strings on AdS Black Holes"
Martin Snoager Sloth (2003): "Cosmology as a Window to Physics Beyond Einstein Gravity"
Asko Jokinen (2003): "Affleck-Dine mechanism and Q-balls along SUSY flat directions"
Antti Sorri (2002): "Active-Sterile Neutrino Oscillation and Lepton Asymmetry Generation in the Early Universe"
Syksy Räsänen (2002): "Topics in Brane Cosmology"
Elina Keihänen (2001): "Big Bang Nucleosynthesis with Inhomogeneous Baryon Density and Antimatter Regions"

Recent MScs from the group:

Mikko Lavinto (2009): "WMAP 5 Year Data and its Implications for Single Field Inflation Models"
Mikko Parviainen (2008): "Cosmic microwave background map making"
Olli Taanila (2008): "Neutrinos and thermal leptogenesis"
Maria Ronkainen (2007): "The role of cosmological coarse graining in the dark energy problem"
Johannes Leppä (2007): "Rajoitukset antimaterian määrälle maailmankaikkeudessa" (Limitations on the Amount of Antimatter in the Universe, in Finnish)
Tony Liimatainen (2007): "Through a black ring to higher dimensions"
Vappu Reijonen (2006): "Phantom energy as a solution to the dark energy problem"
Jan Julin (2005): "Pimeä energia Friedmannin yhtälön modifikaationa" (Dark Energy as a Modification of the Friedmann Equation, in Finnish)
Reijo Keskitalo (2005): "The Effect of Matter and Baryon Densities on the Cosmic Microwave Background Anisotropy"
Lotta Mether (2005): "The Randall-Sundrum Model"
Sami Nurmi (2005): "Ei-gaussiset perturbaatiot kurvatonimallissa" (Non-Gaussian Perturbations in the Curvaton Model, in Finnish)
Touko Tahkokallio (2005): "Gravity and the Holographic Principle"
Toni Tuovinen (2005): "Inflaation jälkeinen kuumeneminen" (Post Inflation Heating, in Finnish)
Teppo Mattsson (2004): "Gravitaation repulsiivisuudesta neli- ja viisiulotteisissa malleissa" (Of the Repulsivity of Gravity in Four and Five Dimensional Models, in Finnish)
Tiera Laitinen (2003), "Kosmisten magneettikenttien synty" (The Origin of Cosmic Magnetic Fields, in Finnish)
Olli Ropponen (2003), "Kosmologiset parametrit" (Cosmological Parameters, in Finnish)
Janne Högdahl (2002), "Looking at the Early Universe Through Gravitational Lenses"
Tomi Koivisto (2002), "Quintessence - Scalar Field as the Cosmic Dark Energy"
Vesa Muhonen (2002), "Cosmic Microwave Background Polarization"
Antti Väihkönen (2002), "Cosmological Inflation and the Linde-Mukhanov Model"
Tomi Salminen (2000), "Simulating Cosmic Structure Formation"
Markku Suominen (2000), "Kosmologisen vakion vaikutus FRW-malleihin" (The Effect of a Cosmological Constant on the FRW Models, in Finnish)
Jussi Väliviita (1999), "An analytic approach to cosmic microwave background radiation"

A Few potentially interesting links:

Publications and Journals Institutes Others

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Division of Elementary Particle Physics,
Theoretical Physics, or
HIP
at University of Helsinki
This page is maintained by Anna-Stiina Sirviö.

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