Zobrazeno 1 - 10
of 381
pro vyhledávání: '"Vennik J"'
Autor:
Vennik J.
Publikováno v:
Open Astronomy, Vol 1, Iss 4, Pp 415-429 (1992)
Externí odkaz:
https://doaj.org/article/0e5f861d650448e0beb7540eed2dda98
We analyze the relationship between star formation (SF), substructure, and supercluster environment in a sample of 107 nearby galaxy clusters using data from the Sloan Digital Sky Survey. Previous works have investigated the relationships between SF
Externí odkaz:
http://arxiv.org/abs/1612.04813
Autor:
Vennik, J., Hopp, U.
We analyse distribution, kinematics and star-formation (SF) properties of satellite galaxies in three different samples of nearby groups. We find that studied groups are generally well approximated by low-concentration NFW model, show a variety of LO
Externí odkaz:
http://arxiv.org/abs/1512.04838
Autor:
Hopp, U., Vennik, J.
Galaxy evolution by interaction driven transformation is probably highly efficient in groups of galaxies. Dwarf galaxies with their shallow potential are expected to reflect the interaction most prominently in their observable structure. The major ai
Externí odkaz:
http://arxiv.org/abs/1407.0307
Autor:
Einasto, M., Liivamagi, L. J., Tempel, E., Saar, E., Vennik, J., Nurmi, P., Gramann, M., Einasto, J., Tago, E., Heinamaki, P., Ahvensalmi, A., Martinez, V. J.
We study the relations between the multimodality of galaxy clusters drawn from the SDSS DR8 and the environment where they reside. As cluster environment we consider the global luminosity density field, supercluster membership, and supercluster morph
Externí odkaz:
http://arxiv.org/abs/1204.0933
Autor:
Einasto, M., Vennik, J., Nurmi, P., Tempel, E., Ahvensalmi, A., Tago, E., Liivamagi, L. J., Saar, E., Heinamaki, P., Einasto, J., Martinez, V. J.
We search for the presence of substructure, a non-Gaussian, asymmetrical velocity distribution of galaxies, and large peculiar velocities of the main galaxies in galaxy clusters with at least 50 member galaxies, drawn from the SDSS DR8. We employ a n
Externí odkaz:
http://arxiv.org/abs/1202.4927
Autor:
Einasto, M., Tago, E., Saar, E., Nurmi, P., Enkvist, I., Einasto, P., Heinamaki, P., Liivamagi, L. J., Tempel, E., Einasto, J., Martinez, V. J., Vennik, J., Pihajoki, P.
We present the results of the study of the substructure and galaxy content of ten rich clusters of galaxies in three different superclusters of the Sloan Great Wall. We determine the substructure in clusters using the 'Mclust' package from the 'R' st
Externí odkaz:
http://arxiv.org/abs/1007.4492
Autor:
Vennik, J., Hopp, U.
We carried out visual and parametric searches for dwarf galaxies in five loose groups of galaxies. Follow-up spectroscopy with the HET has shown a 50% success rate of morphological selection. The evolutionary status of the studied groups differs: whi
Externí odkaz:
http://arxiv.org/abs/0908.4478
Autor:
Vennik, J., Hopp, U.
We carry out a photometric study of a poor group of late-type galaxies around IC 65, with the aim: (a) to search for new dwarf members and to measure their photometric characteristics; (b) to search for possible effects of mutual interactions on the
Externí odkaz:
http://arxiv.org/abs/0710.1786
Publikováno v:
Astron.Astrophys.479:927-937,2008
We extract groups of galaxies from the SDSS Data Release 5 with the purpose of studying the supercluster-void network and environmental properties of groups therein. We use a modified friends-of-friends (FoF) method with adopted variable linking leng
Externí odkaz:
http://arxiv.org/abs/0706.1593