© 2008 American Institute of Physics, S-0031-9228-0804-010-6 Relativistic sound waves raced through the hot plasma that filled the universe for its first 380 000 years. That sound left an imprint that is still discernible in the cosmic microwave background and also in the large-scale distribution of galaxies. Measurements of the sound waves manifested in the CMB, coupled with a detailed underst...

We generalize the spherical collapse model for the formation of bound objects to apply in a Universe with arbitrary positive cosmological constant. We calculate the critical condition for collapse of an overdense region and give exact values of the characteristic densities and redshifts of its evolution.

Enhanced ion line spectra as a response to magnetic field-aligned high frequency (HF) pumping of the overdense polar ionosphere with left-handed circular polarization, can be observed at top and bottomside F-region under certain conditions. The European Incoherent Scatter (EISCAT) UHF radar was directed in zenith on October 18th 19th, 2017 while stepping pump EISCAT Heating facility both upward...

Efficient energy boost of the laser-accelerated ions is critical for their applications in biomedical and hadron research. Achiev-able energies continue to rise, with currently highest energies, allowing access to medical therapy energy windows. Here, a new regime of simultaneous acceleration of ~100 MeV protons and multi-100 MeV carbon-ions from plasma micro-channel targets is proposed by usin...

Aims. An unbiased and detailed characterization of the galaxy luminosity function (LF) is a basic requirement in many astrophysical issues: it is of particular interest in assessing the role of the environment in the evolution of the LF of different galaxy types. Methods. We studied the evolution in the B band LF to redshift z ∼ 1 in the zCOSMOS 10k sample, for which both accurate galaxy classi...

ABSTRACT In this paper, we present CALSAGOS: Clustering ALgorithmS Applied to Galaxies in Overdense Systems which is a PYTHON package developed select cluster members and search, find, identify substructures. CALSAGOS based on clustering algorithms, was be used spectroscopic photometric samples. To test the performance of CALSAGOS, use S-PLUS’s mock catalogues, found an error 1–6 per cent membe...

We generalize the spherical collapse model for the formation of bound objects to apply in a Universe with cosmological constant and quintessence. We calculate the critical condition for collapse of an overdense region and give exact values of the characteristic densities and redshifts of its evolution. We apply the results to calculate the mass function of bound objects. Comparison with the dat...