Available data on the distances and radial velocities of galaxies are systematized in order to study the distribution of peculiar velocities in neighborhoods of the Local cosmic void lying in the direction of the Aquila and Hercules constellations. A sample of 1056 galaxies is used, with distances measured in terms of the luminosity of the tip of the red giant branch (TRGB), the luminosity of the cepheids, the luminosity of type 1a supernovae, surface brightness fluctuations (SBF), and the Tully-Fisher relation. The amplitude of the outflow velocity of the galaxies is found to be ∼300 km/s. The average number density of galaxies inside the void is roughly a factor of five lower than the average outside it. The Local void population is characterized by lower luminosities and later morphological types, with medians of M B = − 15m.7 and T=8 (Sdm), respectively.
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Translated from Astrofizika, Vol. 54, No. 1, pp. 5–19 (February 2011).
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Nasonova, O.G., Karachentsev, I.D. Kinematics of the Local cosmic void. Astrophysics 54, 1–14 (2011). https://doi.org/10.1007/s10511-011-9153-1
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DOI: https://doi.org/10.1007/s10511-011-9153-1