Results 111 to 120 of about 49,590 (221)

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-of-the-art orbit-based dynamical models to constrain their total mass budgets, including the ...
openaire   +2 more sources

Causal Discovery in Astrophysics: Unraveling Supermassive Black Hole and Galaxy Coevolution

The Astrophysical Journal
Correlation does not imply causation, but patterns of statistical association between variables can be exploited to infer a causal structure (even with purely observational data) with the burgeoning field of causal discovery.
Zehao Jin, Mario Pasquato, Benjamin L. Davis, Tristan Deleu, Yu Luo, Changhyun Cho, Pablo Lemos, Laurence Perreault-Levasseur, Yoshua Bengio, Xi Kang, Andrea Valerio Macciò, Yashar Hezaveh   +11 more
doaj   +1 more source

Stellar populations of seven early-type dwarf galaxies and their nuclei

, 2009
Dwarf galaxies are the numerically dominating population in the dense regions of the universe. Although they seem to be simple systems at first view, the stellar populations of dwarf elliptical galaxies (dEs) might be fairly complex. Nucleated dEs are of
Babul, Bothun, Bruzual, Lisker, Lisker, Lisker, Lisker, Mateo, Michielsen, Oh, Poggianti, Silk, Van den Bergh, van Zee   +13 more
core   +1 more source

Disks Controlling Chaos in a 3D Dynamical Model for Elliptical Galaxies

Open Astronomy, 2011
A 3D dynamical model with a quasi-homogeneous core and a disk component is used for the chaos control in the central parts of elliptical galaxy.
Zotos Euaggelos E.
doaj   +1 more source

Hot gusts from elliptical galaxies

The Astrophysical Journal, 1981
The pulsed wind is an intrinsic mechanism for removing gas from elliptical galaxies and is based upon the suggestion that Type I supernovae originate in a young stellar population. In this model, a period of gas accumulation is followed by cooling and star formation which is followed by a burst of supernova activity and a short-lived but intense wind ...
openaire   +2 more sources

Scaling Relations of Early-Type Galaxies in MOND

Galaxies
We investigate the shape and morphology of early-type galaxies (ETGs) within the framework of Modified Newtonian Dynamics (MOND). Building on our previous studies, which demonstrated that the monolithic collapse of primordial gas clouds in MOND produces ...
Robin Eappen, Pavel Kroupa
doaj   +1 more source

The Baryonic Halos of Isolated Elliptical Galaxies

Galaxies, 2017
Without the interference of a number of events, galaxies may suffer in crowded environments (e.g., stripping, harassment, strangulation); isolated elliptical galaxies provide a control sample for the study of galaxy formation.
Ricardo Salinas, Adebusola Alabi, Nicklas Hammar, Tom Richtler, Richard R. Lane, Mischa Schirmer   +5 more
doaj   +1 more source

The Relation Between Galaxy Morphology and Environment in the Local Universe: An RC3-SDSS Picture

, 2011
We present an analysis of the z ~ 0 morphology-environment relation for 911 bright (M_B < -19) galaxies, matching classical RC3 morphologies to the SDSS-based group catalog of Yang et al.
Adelman-McCarthy, Baldi, Becker, Bekki, Bell, Bernardi, Blanton, Blanton, Blanton, Bower, Brown, Bundy, Burstein, Buta, Cavagnolo, Cavagnolo, Christlein, Chung, Cox, D'Onofrio, David J. Wilman, de la Rosa, de Vaucouleurs, de Vaucouleurs, Desai, Donahue, Dong, Dressler, Elmegreen, Eskridge, Fasano, Fukugita, Genzel, Gnedin, Granato, Hicks, Hogg, Hopkins, Hopkins, Hopkins, Hopkins, Häring, Just, Kaiser, Kawata, Kewley, Kormendy, Laurikainen, Magorrian, Marconi, Marinova, McCarthy, McNamara, Menéndez-Delmestre, Moore, Moran, Nair, Nair, Nair, Nesci, Noguchi, Nulsen, Peter Erwin, Poggianti, Poggianti, Postman, Rines, Salo, Schawinski, Schlegel, Sellwood, Smith, Springel, Strauss, Sun, Thomas, van Dokkum, von der Linden, Weinmann, West, Wilman, Yang   +81 more
core   +1 more source

Relativistic jets in narrow-line Seyfert 1 galaxies. New discoveries and open questions

EPJ Web of Conferences, 2013
Before the launch of the Fermi satellite only two classes of AGNs were known to produce relativistic jets and thus emit up to the γ-ray energy range: blazars and radio galaxies, both hosted in giant elliptical galaxies.
D’Ammando F., Orienti M., Finke J., Larsson J., Giroletti M.   +4 more
doaj   +1 more source

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