Results 121 to 130 of about 3,870 (231)

BL Lac Host Galaxies: How to Systematically Characterize Them in Optical–Near-infrared Spectroscopy

The Astrophysical Journal
Host galaxies of active galactic nuclei (AGN) give crucial information on the interaction between accreting supermassive black holes and their surroundings and on their common evolution.
Gaia Delucchi, Tullia Sbarrato, Giorgio Calderone, Chiara Righi, Silvano Tosi, Boris Sbarufatti   +5 more
doaj   +1 more source

Metallicity distributions of elliptical galaxies and globular cluster systems - Absorption line strength gradients in elliptical galaxies

, 1999
Gradients of absorption line indices are studied and mean stellar metallicities are estimated for 46 elliptical galaxies. The mean stellar metallicities range from [[Fe/H]] similar or equal to -0.8 to +0.2 and ellipticals with smaller central velocity ...
Arimoto, N, Kobayashi, Chiaki
core  

Cold Gas and Star Formation in Elliptical Galaxies

, 2007
. Elliptical galaxies outside dense clusters are observed to contain small amounts (relative to spiral galaxies) of cold interstellar gas. This review discusses the atomic gas, the molecular gas, and the dust in elliptical galaxies.
Gillian Knapp
core  

WHY EXTENDED RADIO DOUBLES ARE FOUND IN ELLIPTICAL GALAXIES

, 2014
[[abstract]]Elliptical galaxies rotate very slowly, and this rotation affects the way in which gas lost from stars finds its way into the nucleus. It is suggested that the dynamical nature of this flow is the reason why extended double radio sources ...
SPARKE, L.S.;SHU, F.H.
core   +1 more source

Structure and Kinematics of Star-forming Elliptical Galaxies in SDSS-MaNGA

The Astrophysical Journal
Using “spatially” resolved spectroscopy, we investigated the characteristics and different modes of formation of stars in elliptical galaxies. We identified an unusual population of 59 star-forming elliptical (SF-E) galaxies in SDSS-MaNGA, our primary ...
Pralay Biswas, Yogesh Wadadekar
doaj   +1 more source

An Improved Distance Indicator for Elliptical Galaxies

, 1986
We present a new relation between velocity dispersion, surface brightness, and radius (or luminosity) for elliptical galaxies. Relative distances of galaxies can be estimated to within 0.13 in log D.
Djorgovski, S., Davis, Marc
core  

Investigation of the Nuclear Cross-Sections for Proton Capture Reactionsin the Star Formation Process of the Galaxies

Iraqi Journal of Physics
Understanding the CNO cycle and the proton-proton (p-p) chain is essential for comprehending the development of main sequence stars in the initial stages of spiral and elliptical galaxy formation. This study investigates two nuclear reactions that occur
Rabab Muzhir J., Al Najm M. N.
doaj   +1 more source

Connecting Cores and Black Hole Dynamics across Scales: From Globular Clusters to Massive Ellipticals

The Astrophysical Journal Letters
The centers of massive elliptical galaxies exhibit a wide range in density profiles, from central cusps to resolved cores with order kiloparsec sizes.
Kyle Kremer, Newlin C. Weatherford, Philip F. Hopkins, Nicholas Z. Rui, Claire S. Ye   +4 more
doaj   +1 more source

The origin of elliptical galaxies inferred from their metallicity gradients

, 2003
We simulate the chemodynamical evolution of elliptical galaxies using our GRAPE-SPH code. We succeed in reproducing the observed variety of the radial metallicity gradients, from which we discuss the origin of elliptical ...
Kobayashi, C
core  

Compact Elliptical Galaxies

, 2015
In this thesis, a sample of nearby, compact, elliptical galaxies with high central stellar velocity dispersions are studied. By means of high quality photometric and spectroscopic observations, we analyse their structural properties and construct state ...
Yildirim, Akin
core   +1 more source