Results 81 to 90 of about 491,118 (170)

Spectral analysis of the elliptical galaxy NGC 7796 with suzaku

Journal of Radiation Research and Applied Sciences
We report Suzaku X-ray spectral analysis of the elliptical galaxy NGC 7796. We found the temperature and the abundances of O (∼0.54 keV), Ne (∼0.87 keV), Mg (∼1.30 keV), Si (∼1.84 keV), (hearafter O–Si), and Fe (∼6.4 keV) in the NGC 7796 for the first ...
Ebru Aktekin Çalışkan
doaj   +1 more source

A New Dynamical Parameter for the Study of Sticky Orbits in a 3D Galactic Model

Open Astronomy, 2011
A 3D dynamical model is used to study the motion in the central parts of an elliptical galaxy, hosting a massive and dense nucleus. Our aim is to investigate the regular or chaotic character of the motion, with emphasis in the different chaotic ...
Zotos Euaggelos E.
doaj   +1 more source

No Evidence of a Dichotomy in the Elliptical Galaxy Population

The Astrophysical Journal
The advent of large integral field spectroscopic surveys has found that elliptical galaxies (EGs) can be divided into two classes: the fast rotators (whose kinematics are dominated by rotation) and the slow rotators (which exhibit slow or no rotation ...
Rogério Monteiro-Oliveira, Yen-Ting Lin, Wei-Huai Chen, Chen-Yu Chuang, Abdurro’uf, Po-Feng Wu   +5 more
doaj   +1 more source

Evolution of Massive Red Galaxies in Clusters from z = 1.0 to z = 0.3

The Astronomical Journal
A critical issue in studying the evolution of galaxy clusters is to find ways that enable meaningful comparisons of clusters observed at different redshifts, as well as in various stages of their growth.
Yen-Ting Lin, Kai-Feng Chen, Tsung-Chi Chen, Chen-Yu Chuang, Masamune Oguri   +4 more
doaj   +1 more source

Core Formation by Binary Scouring and Gravitational Wave Recoil in Massive Elliptical Galaxies

The Astrophysical Journal
Scouring by supermassive black hole (SMBH) binaries is the most accepted mechanism for the formation of the cores seen in giant elliptical galaxies. However, an additional mechanism is required to explain the largest observed cores.
Nader Khonji, Alessia Gualandris, Justin I. Read, Walter Dehnen   +3 more
doaj   +1 more source

Where Have All the Little Red Dots Gone? Supermassive Black Hole Binary Dynamics and Its Impact on Galaxy Properties

The Astrophysical Journal Letters
Recent James Webb Space Telescope observations have revealed a peculiar class of galaxies at redshifts z  ≳ 6, characterized by extremely high central stellar densities and overmassive central supermassive black holes (SMBHs), “little red dots” (LRDs). A
Fazeel Mahmood Khan, Benjamin L. Davis, Andrea Valerio Macciò, Kelly Holley-Bockelmann   +3 more
doaj   +1 more source

The Central Kinematics and Black Hole Mass of 4C+37.11

The Astrophysical Journal
We report on integral field unit (IFU) measurements of the host of the radio source 4C+37.11. This massive elliptical contains the only resolved double compact nucleus at parsec-scale separation, likely a bound supermassive black hole binary (SMBHB).
Tirth Surti, Roger W. Romani, Julia Scharwächter, Alison Peck, Greg B. Taylor   +4 more
doaj   +1 more source

A rising tide: intrinsic alignments since the turn of the millennium. [PDF]

Astron Astrophys Rev
Chisari NE.
europepmc   +1 more source

Astronomia ex machina: a history, primer and outlook on neural networks in astronomy. [PDF]

R Soc Open Sci, 2023
Smith MJ, Geach JE.
europepmc   +1 more source

Strong Lensing by Galaxies. [PDF]

Space Sci Rev
Shajib AJ, Vernardos G, Collett TE, Motta V, Sluse D, Williams LLR, Saha P, Birrer S, Spiniello C, Treu T.   +9 more
europepmc   +1 more source