Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Marek Demianski"'
Autor:
Blandford, Roger
Publikováno v:
American Scientist, 1987 Nov 01. 75(6), 634-634.
Externí odkaz:
https://www.jstor.org/stable/27854902
Autor:
Marek Demianski, Ester Piedipalumbo
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 7, Pp 1-9 (2019)
Abstract In the last dozens of years different data sets revealed the accelerated expansion of the Universe which is driven by the so called dark energy, that now dominates the total amount of matter-energy in the Universe. In a recent paper Glavan,
Externí odkaz:
https://doaj.org/article/9a4782362d76400da412244761c533b3
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 7 (2020)
Several independent cosmological data, collected within the last 20 years, revealed the accelerated expansion rate of the Universe, usually assumed to be driven by the so called dark energy, which, according to recent estimates, provides now about 70
Externí odkaz:
https://doaj.org/article/161b124ee9e647a8b3d8c2cc74e5901a
Publikováno v:
Astronomy Reports. 64:883-893
A comparison of the virial parameters of galaxies and galaxy clusters (radius, density, and entropy function) in a wide range of masses, $${{10}^{6}} \leqslant {{M}_{{{\text{vir}}}}}{\text{/}}{{M}_{ \odot }} \leqslant {{10}^{{14}}}$$ , shows that the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::947ac911db642b5dfb48726cb4303ce8
https://doi.org/10.1134/s1063772920120045
https://doi.org/10.1134/s1063772920120045
Publikováno v:
Astronomy Letters. 46:359-369
We propose a method of analyzing the absorption spectra of quasars that allows the physical parameters of absorbing clouds, absorbers, to be roughly estimated: their masses, sizes, and mean densities. An analysis of three representative catalogs of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8db94a018ec23a8d02658ac8da1e7187
https://doi.org/10.1134/s106377372006002x
https://doi.org/10.1134/s106377372006002x
Autor:
Marek Demianski, A. Doroshkevich
Publikováno v:
Astronomy Reports. 62:859-867
We analyze four high resolution rich samples of Ly-α and metal lines (two at z ≥ 2 and two at z ≤ 0.2). We describe evolution of the observed Doppler parameters and absorbers separation and propose a model of the forest. We argue that all absorp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfc624ccdf0af5d8f8afaa5b7ba522eb
https://doi.org/10.1134/s1063772918120193
https://doi.org/10.1134/s1063772918120193
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 506 (1), pp.903-918. ⟨10.1093/mnras/stab1669⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 506 (1), pp.903-918. ⟨10.1093/mnras/stab1669⟩
So far large and different data sets revealed the accelerated expansion rate of the Universe, which is usually explained in terms of dark energy. The nature of dark energy is not yet known, and several models have been introduced: a non zero cosmolog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f195ef79457381ee14905fde885e6b4b
http://arxiv.org/abs/1911.08228
http://arxiv.org/abs/1911.08228
Autor:
Marek Demianski, E. Piedipalumbo
Publikováno v:
Astronomy Reports. 59:484-490
We briefly review the history of the cosmological constant. Recently discovered accelerated expansion epoch of the universe placed the problem of the cosmological constant at a forefront of interest of astronomers and physicists. Short account of rec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f23197449db493d259dbd89906796da
https://doi.org/10.1134/s1063772915060116
https://doi.org/10.1134/s1063772915060116
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 598, pp.A113. ⟨10.1051/0004-6361/201628911⟩
Astron.Astrophys.
Astron.Astrophys., 2017, 598, pp.A113. ⟨10.1051/0004-6361/201628911⟩
Astron.Astrophys., 2017, 598, pp.A113. 〈10.1051/0004-6361/201628911〉
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 598, pp.A113. ⟨10.1051/0004-6361/201628911⟩
Astron.Astrophys.
Astron.Astrophys., 2017, 598, pp.A113. ⟨10.1051/0004-6361/201628911⟩
Astron.Astrophys., 2017, 598, pp.A113. 〈10.1051/0004-6361/201628911〉
Context. Explaining the accelerated expansion of the Universe is one of the fundamental challenges in physics today. Cosmography provides information about the evolution of the universe derived from measured distances, assuming only that the space ti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a7b5dc770198b4a8a0a86e56d6e48cb
https://hal.archives-ouvertes.fr/hal-01554766
https://hal.archives-ouvertes.fr/hal-01554766