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Press releases » 12/06/2009

Jaan Einasto obtained the Marcel Grossmannn award

Jaan EinastoJaan Einasto

The Marcel Grossman award is given for outstanding results in theoretical physics and cosmology by the International Centre for Relativistic Astrophysics (ICRA, Italy) and the International Network of Science Institutions (ICRANet) since 1985.

Marcel Grossmann was a Swiss mathematician, classmate of Albert Einstein, who encouraged and tutored Einstein to use geometry of curved spaces as the mathematical formalism for the general relativity theory. The award is given every third year, to a science institution and to two or three scientists. The award is very prestigious; the list of those awarded before includes, e.g., the Vatican Observatory and several Nobel Prize winners.

This year the award will be given to a well-known Estonian cosmologist, a senior research scientist of Tartu Observatory, academician Jaan Einasto, for his pioneering contributions in the discovery of dark matter and the cosmic web and for fostering research in the historic Tartu Observatory.

Together with Jaan Einasto, the award will be given to Christine Jones for contributions to X-ray studies of galaxies and galaxy clusters, and to Michael Kramer for contributions to pulsar astrophysics. The Institutional award will go to the Institute of Higher Scientific Studies (France).

The awards will be presented at the 12th Marcel Grossmann meeting in Paris, July 12, 2009.

Additional information:

Jaan Einasto has led galactic and cosmological studies in Tartu Observatory for about 50 years and is well known in the world astronomical community. His main results include the discovery of dark matter around galaxies, and the cellular large-scale network of galaxy filaments and voids. He is a member of the Estonian Academy of Sciences, Academia Europeae, Royal Astronomical Society, American Astronomical Society, International Astronomical Union and German Astronomical Society. During his career, Jaan Einasto has obtained four Estonian science awards, the last of them in 2007.

According to the present cosmological paradigm, dark matter is the main constituent of the Universe - there is about ten times more dark matter than ordinary baryonic matter. Together with dark energy, dark matter determines the birth, evolution, and the final fate of the Universe. Hints for its existence come as far as from 1930-s, Einasto's discovery dates from 1974, and at the present there are several space and collider experiments running to discover it experimentally.

The cosmic web (the Sloan Digital Sky Survey) The cosmic web (the Sloan Digital Sky Survey). The cellular distribution of superclusters and filaments surrounding voids is clearly seen.

The large-scale distribution of galaxies is not composed of galaxy clusters, as expected earlier (the island Universe), but forms a vast network of galaxy filaments and galaxy clusters that surround huge voids. The network was discovered in late 1970-s, and the observational properties and the physical reasons leading to such an arrangement are yet under intense study.

See also:

Einasto, J., Kaasik, A., Saar, E., 1974. Dynamical evidence for massive coronas of galaxies, Nature, 250, 309-310

Einasto, J., Jõeveer, M., Saar, E., 1980. Superclusters and galaxy formation, Nature, 283, 47-51

12th Marcel Grossmann meeting, Paris, July 12-18, 2009

Marcel Grossmann awards

Contact at Tartu Observatory:

Enn Saar (saar [at] aai.ee), Laurits Leedjärv (leed [at] aai.ee)
 



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