no code implementations • 23 Dec 2020 • L. S. Pilyugin, I. A. Zinchenko, M. A. Lara-Lopez, Y. A. Nefedyev, J. M. Vilchez
We find that there are two types of distribution of the gas velocity dispersion across the images of galaxies: (i) the distributions of 909 galaxies show a radial symmetry with or without the sigma enhancement at the center (R distribution) and (ii) distributions with a band of enhanced sigma along the minor axis in the images of 159 galaxies with or without the sigma enhancement at the center (B distribution) The sigma distribution across the images of 78 galaxies cannot be reliable classified.
Astrophysics of Galaxies
no code implementations • 7 Dec 2020 • M. Trevisan, G. A. Mamon, T. X. Thuan, F. Ferrari, L. S. Pilyugin, A. Ranjan
In a previous article, we analyzed 280 000 SDSS spectra to identify a surprisingly large sample of more massive Very Young Galaxies (VYGs), defined to have formed at least $50\%$ of their stellar mass within the last 1 Gyr.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
