Results 91 to 100 of about 618,301 (285)
Structural properties of dwarf elliptical galaxies and the connection with (ordinary) elliptical galaxies [PDF]
2005, IAU Colloquia 198, p.303-310, 2005 This article reviews the popular reasons for the belief that dwarf elliptical galaxies and (ordinary) elliptical galaxies are distinct and separate species. They include: light-profile shape (or similarly image concentration); the magnitude-central surface brightness diagram; the magnitude-effective surface brightness diagram (or similarly the ...
arxiv +1 more source
Weak homology of elliptical galaxies [PDF]
Astronomy & Astrophysics, 2002 We start by studying a small set of objects characterized by photometric profiles that have been pointed out to deviate significantly from the standard R^{1/4} law. For these objects we confirm that a generic R^{1/n} law, with n a free parameter, can provide superior fits (the best-fit value of n can be lower than 2.5 or higher than 10), better than ...
Bertin, G., Ciotti, L., Del Principe, M.
openaire +4 more sources
Dissecting the size evolution of elliptical galaxies since z∼ 1: puffing-up versus minor-merging scenarios [PDF]
, 2011 At a fixed stellar mass, the size of low-redshift early-type galaxies is found to be a factor of 2 larger than that of their counterparts at z∼ 1, a result with important implications for galaxy formation models.
I. Trujillo +2 more
semanticscholar +1 more source
CONFIRMATION OF ENHANCED DWARF-SENSITIVE ABSORPTION FEATURES IN THE SPECTRA OF MASSIVE ELLIPTICAL GALAXIES: FURTHER EVIDENCE FOR A NON-UNIVERSAL INITIAL MASS FUNCTION [PDF]
, 2011 We recently found that massive cluster elliptical galaxies have strong Na i λ8183, 8195 and FeH λ9916 Wing–Ford band absorption, indicating the presence of a very large population of stars with masses ≲ 0.3 M☉.
P. V. van Dokkum, C. Conroy
semanticscholar +1 more source
The habitability of large elliptical galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Based on numbers of stars, supernova rates, and metallicity, a prior study concluded that large elliptical galaxies contain up to 10 000 times more habitable planets than the Milky Way and are thus the ‘cradles of life’. Using the results of their model and taking into account galactic number distributions and supernova rates, I
openaire +3 more sources
Velocity dispersions and mass-to-light ratios for elliptical galaxies.
, 1976 The close correlation between luminosity and dynamical properties for normal ellipticals is further evidence that the ellipticals are very nearly a one-parameter family with total mass as the most important independent variable. (AIP)
S. Faber, R. E. Jackson
semanticscholar +1 more source
Fundamental Properties of Elliptical Galaxies
, 1987 The global properties of elliptical galaxies, such as luminosity, radius, projected velocity dispersion, projected luminosity, etc., form a two-dimensional family.
S. Djorgovski, M. Davis
semanticscholar +1 more source
MINOR MERGERS AND THE SIZE EVOLUTION OF ELLIPTICAL GALAXIES [PDF]
, 2009 Using a high-resolution hydrodynamical cosmological simulation of the formation of a massive spheroidal galaxy we show that elliptical galaxies can be very compact and massive at high redshift in agreement with recent observations.
T. Naab, P. Johansson, J. Ostriker
semanticscholar +1 more source
UV Visibility of Moderate-Redshift Giant Elliptical Galaxies [PDF]
Journal of Astronomy and Space Sciences, 1998 We show quantitatively whether giant elliptical galaxies would be visible at far UV wavelengths if they were placed at moderate redshift of 0.4-0.5. On the basis of simple cosmological tests, we conclude that giant elliptical galaxies can be detectable ...
Myung-Hyun Rhee +3 more
doaj
Advanced Life Peaked Billions of Years Ago According to Black Holes
Galaxies, 2023 The link between black holes and star formation allows for us to draw a connection between black holes and the places and times when extraterrestrial intelligences (ETIs) had a greater chance of emerging.
David Garofalo
doaj +1 more source