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- Tartu ObservatoryEE58 papers
- University of TartuEE50 papers
- International Center for Relativistic AstrophysicsIT28 papers
- Leibniz Institute for Astrophysics PotsdamDE15 papers
- University of TurkuFI15 papers
- National Institute of Chemical Physics and BiophysicsEE14 papers
- Centre National de la Recherche ScientifiqueFR11 papers
- Instituto de Astrofísica de CanariasES7 papers
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6 papers · 1 filter
Weaker relatives of the bounded approximation property for a Banach operator ideal
Silvia Lassalle, Eve Oja, Pablo Turco
Fixed a Banach operator ideal , we introduce and investigate two new approximation properties, which are strictly weaker than the bounded approximation property (BAP) f…
On -null sequences and their relatives
Kati Ain, Eve Oja
Let and , where is the conjugate index of . We prove an omnibus theorem, which provides numerous equivalences for a sequence $(x…
Tracing high redshift cosmic web with quasar systems
Maret Einasto, Erik Tago, Heidi Lietzen +6
We trace the cosmic web at redshifts 1.0 <= z <= 1.8 using the quasar data from the SDSS DR7 QSO catalogue (Schneider et al. 2010). We apply a friend-of-friend (FoF) algorithm to t…
Galaxy filaments as pearl necklaces
E. Tempel, R. Kipper, E. Saar +3
Context. Galaxies in the Universe form chains (filaments) that connect groups and clusters of galaxies. The filamentary network includes nearly half of the galaxies and is visually…
Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation
E. Tempel, A. Tamm, M. Gramann +6
We provide flux-limited and volume-limited galaxy group and cluster catalogues, based on the spectroscopic sample of the SDSS data release 10 galaxies. We used a modified friends-o…
SDSS superclusters: morphology and galaxy content
M. Einasto, H. Lietzen, E. Tempel +3
We compare the galaxy populations in superclusters of different morphology in the nearby Universe (180 < d < 270 Mpc) to see whether the inner structure and overall morphology of s…