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Local dark energy: HST evidence from the vicinity of the M81/M82 galaxy group
Karachentsev, I. D.; Kashibadze, O. G.; Makarov, D. I. +5 more
The Hubble Space Telescope observations of the nearby galaxy group M81/M82 and its vicinity indicate that the dynamics of the expansion outflow around the group is dominated by the antigravity of the dark energy background. The local density of dark energy in the area is estimated to be near the global dark energy density or perhaps exactly equal …
X-ray emission of OH megamaser galaxies
Hambaryan, V. V.; Kandalyan, R. A.; Sabat, H. A.
The properties of OH megamaser galaxies in the x-ray region are discussed. Observational data from the XMM-Newton x-ray satellite are presented for three megamasers, IRAS 01418+1651, IRAS 11010+4107, and IRAS 13218+0552. Based on a sample of OH megamaser galaxies it is shown that the x-ray and OH emission are closely coupled. Megamaser emission al…