scholarly journals Galaxies: kinematics to dynamics

2019 ◽  
pp. 129-144
Author(s):  
Michael R. Merrifield
Keyword(s):  
Galaxies Kinematics

The co-responsibility of mass and environment in the formation of lenticular galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 173-174
Author(s):  
A. Cortesi ◽  
L. Coccato ◽  
M. L. Buzzo ◽  
K. Menéndez-Delmestre ◽  
T. Goncalves ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Maximum Likelihood Method ◽  
Spiral Galaxies ◽  
Galactic Nuclei ◽  
Rotation Velocity ◽  
Elliptical Galaxies ◽  
Likelihood Method ◽  
Data Set ◽  
Lenticular Galaxies ◽  
Galaxies Kinematics

AbstractWe present the latest data release of the Planetary Nebulae Spectrograph Survey (PNS) of ten lenticular galaxies and two spiral galaxies. With this data set we are able to recover the galaxies’ kinematics out to several effective radii. We use a maximum likelihood method to decompose the disk and spheroid kinematics and we compare it with the kinematics of spiral and elliptical galaxies. We build the Tully- Fisher (TF) relation for these galaxies and we compare with data from the literature and simulations. We find that the disks of lenticular galaxies are hotter than the disks of spiral galaxies at low redshifts, but still dominated by rotation velocity. The mechanism responsible for the formation of these lenticular galaxies is neither major mergers, nor a gentle quenching driven by stripping or Active Galactic Nuclei (AGN) feedback.

scholarly journals A spectroscopic survey of Abell 1703: is it a rare relaxed cluster hosting a radio halo or a usual merging system?

2020 ◽  
Vol 492 (2) ◽  
pp. 2405-2417 ◽  
Author(s):  
W Boschin ◽  
M Girardi ◽  
F Gastaldello
Keyword(s):  
Gravitational Lensing ◽  
Statistical Tests ◽  
Galaxy Cluster ◽  
Theoretical Models ◽  
Sloan Digital Sky Survey ◽  
Cluster Galaxies ◽  
Radio Halo ◽  
Sky Survey ◽  
Galaxies Kinematics ◽  
First Moment

ABSTRACT We present the study of the internal dynamics of the intriguing galaxy cluster Abell 1703, a system hosting a probable giant radio halo whose dynamical status is still controversial. Our analysis is based on unpublished spectroscopic data acquired at the Italian Telescopio Nazionale Galileo and data publicly available in the literature. We also use photometric data from the Sloan Digital Sky Survey. We select 147 cluster members and compute the cluster redshift 〈z〉 ∼ 0.277 and the global line-of-sight velocity dispersion σv ∼ 1300 km s−1. We infer that Abell 1703 is a massive cluster: M200 ∼ 1–2 × 1015 M⊙. The results of our study disagree with the picture of an unimodal, relaxed cluster as suggested by previous studies based on the gravitational lensing analysis and support the view of a perturbed dynamics proposed by recent works based on Chandra X-ray data. The first strong evidence of a dynamically disturbed cluster comes from the peculiarity of the BCG velocity with respect to the first moment of the velocity distribution of member galaxies. Moreover, several statistical tests employed to study the cluster galaxies kinematics find significant evidence of substructure, being Abell 1703 composed by at least two or three subclumps probably caught after the core–core passage. In this observational scenario, the suspected existence of a radio halo in the centre of this cluster is not surprising and well agrees with the theoretical models describing diffuse radio sources in clusters.

scholarly journals 3D spectroscopy of local luminous compact blue galaxies: kinematics of NGC 7673

2010 ◽  
Vol 402 (2) ◽  
pp. 1397-1406 ◽  
Author(s):  
J. Pérez-Gallego ◽  
R. Guzmán ◽  
A. Castillo-Morales ◽  
F. J. Castander ◽  
J. Gallego ◽  
...  
Keyword(s):  
Blue Galaxies ◽  
Galaxies Kinematics

scholarly journals Optical 3D Spectroscopy of Seyfert Galaxies: Kinematics and Excitation of Gas in Centers

2006 ◽  
Vol 2 (S235) ◽  
pp. 140-140
Author(s):  
I. Stoklasová ◽  
P. Ferruit ◽  
B. Jungwiert ◽  
E. Emsellem
Keyword(s):  
Electron Density ◽  
Seyfert Galaxies ◽  
Optical Observations ◽  
Gas Emission ◽  
Gas Kinematics ◽  
Galaxies Kinematics ◽  
Integral Field

AbstractWe present a set of optical observations of excited gas emission in the central kiloparsecs of nearby Seyfert galaxies, as obtained with the integral-field (3D) spectrograph OASIS. We map the 2D emission distribution as well as the gas kinematics, derive the electron density and estimate the extinction due to dust.

scholarly journals Outflows of Very Ionized Gas in the Centers of Seyfert Galaxies: Kinematics and Physical Conditions

2006 ◽  
Vol 653 (2) ◽  
pp. 1098-1114 ◽  
Author(s):  
Alberto Rodriguez‐Ardila ◽  
M. Almudena Prieto ◽  
Sueli Viegas ◽  
Ruth Gruenwald
Keyword(s):  
Seyfert Galaxies ◽  
Ionized Gas ◽  
Physical Conditions ◽  
Galaxies Kinematics

scholarly journals Elliptical galaxies kinematics within general relativity with renormalization group effects

2013 ◽  
Author(s):  
DAVI CABRAL RODRIGUES ◽  
Oliver Fabio Piattella ◽  
Julio Fabris ◽  
Ilya L. Shapiro
Keyword(s):  
General Relativity ◽  
Renormalization Group ◽  
Elliptical Galaxies ◽  
Galaxies Kinematics ◽  
Group Effects
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