1 citations · 1 across the 1 of their papers we have counts for
6 papers · 1 filter
Star complexes and starburst clumps in spiral galaxies
Yu. N. Efremov
Star complexes are the highest level groupings in the hierarchy of the embedded young stars, clusters and associations, which obey the size - age relation. Starburst clumps, supera…
Cosmic Intelligence and Black Holes
Vladimir A. Lefebvre, Yuri N. Efremov
The paper is devoted to a new direction in SETI. After a general discussion of the field, the authors put forth the hypothesis that the black holes may serve as a physical substrat…
Giant Stellar Arcs as the imprint of Precessing Gamma Jets by Gamma-Ray Bursts
Yuri Efremov, Daniele Fargion
Precessing Gamma Jets, originated by Neutron Stars or Black Holes, may blaze to the observer leading to Gamma Bursts (GRBs) and Soft Gamma repeaters (SGRs). The thin gamma jet is b…
Gamma Ray Bursts versus OB Associations: do they trigger star formation?
Yu. N. Efremov, S. Ehlerova, J. Palous
We discuss differences in shapes, expansion velocities and fragmentation times of structures created by an energy deposition from a single Gamma Ray Burst (GRB) or an OB associatio…
Observations and Theory of Star Cluster Formation
B. G. Elmegreen, Y. N. Efremov, R. E. Pudritz +1
Young stars form on a wide range of scales, producing aggregates and clusters with various degrees of gravitational self-binding. The loose aggregates have a hierarchical structure…
Spontaneous and Induced Star Formation in the LMC
Y. N. Efremov, B. G. Elmegreen
Spontaneous and triggered star formation in the LMC is discussed with data on star clusters ages and positions. The supershell LMC4 and the stellar arcs in the same region are sugg…