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We explore whether global observed properties, specifically half-light radii, mean surface brightness, and integrated stellar kinematics, suffice to unambiguously differentiate galaxies from star clusters, which presumably formed…

宇宙学与河外天体物理 · 物理学 2015-05-20 Dennis Zaritsky , Ann I. Zabludoff , Anthony H. Gonzalez

Observations and numerical simulations have shown that the relation between the mass scaled with the critical density of the universe and the X-ray temperature of galaxy clusters is approximately represented by $M_\Delta \propto T_X^{3/2}$…

星系天体物理 · 物理学 2018-08-15 Yutaka Fujita , Keiichi Umetsu , Stefano Ettori , Elena Rasia , Nobuhiro Okabe , Massimo Meneghetti

We derive the relative distances to the Virgo, Fornax, and Coma clusters of galaxies by applying the Dn-sigma and the Fundamental Plane (FP) relations to the data of the homogeneous samples of early--type galaxies studied by Caon etal,…

天体物理学 · 物理学 2015-06-24 M. D'Onofrio , M. Capaccioli , S. Zaggia , N. Caon

Fundamental Plane studies provide an excellent means of understanding the evolutionary history of early-type galaxies. Using the Low Resolution Imaging Spectrograph on the Keck telescope, we obtained internal stellar kinematic information…

We consider the Fundamental Plane of elliptical galaxies lensed by the gravitational field of a massive deflector (typically, a cluster of galaxies). We show that the Fundamental Plane relation provides a straightforward measurement of the…

天体物理学 · 物理学 2011-02-11 Giuseppe Bertin , Marco Lombardi

We use deep spectroscopy from the SAMI Galaxy Survey to explore the precision of the fundamental plane of early-type galaxies (FP) as a distance indicator for future single-fibre spectroscopy surveys. We study the optimal trade-off between…

[Abridged] We present ground-based MDM V-band and Spitzer/IRAC 3.6um-band photometric observations of the 72 representative galaxies of the SAURON Survey. In combination with the SAURON stellar velocity dispersion measured within an…

Using PHANGS-HST NUV-U-B-V-I imaging of 17 nearby spiral galaxies, we study samples of star clusters and stellar associations, visually selected to be bright and relatively isolated, for three purposes: to compute aperture corrections for…

The proper motions of stars in the outskirts of globular clusters are used to estimate cluster velocity dispersion profiles as far as possible within their tidal radii. We use individual color-magnitude diagrams to select high probability…

星系天体物理 · 物理学 2021-12-08 Raymond G. Carlberg , Carl J. Grillmair

We utilize the data from the Apache Point Observatory Galactic Evolution Experiment-2 (APOGEE-2) in the fourteenth data release of the Sloan Digital Sky Survey (SDSS) to calculate the line-of-sight velocity dispersion $\sigma_{1D}$ of a…

星系天体物理 · 物理学 2018-11-28 Xiaoying Pang , Shiyin Shen , Zhengyi Shao

We use stellar masses, photometry, lensing, and velocity dispersions to investigate empirical correlations for the final sample of 73 early-type lens galaxies (ETGs) from the SLACS survey. The traditional correlations (Fundamental Plane…

宇宙学与河外天体物理 · 物理学 2015-05-19 M. W. Auger , T. Treu , A. S. Bolton , R. Gavazzi , L. V. E. Koopmans , P. J. Marshall , L. A. Moustakas , S. Burles

We review the concept of the Fundamental Plane (FP), and present new results on the near-infrared FP. We show that the K-band FP differs both from the optical form and the virial expectation under the assumption of constant (M/L) and…

天体物理学 · 物理学 2007-05-23 M. A. Pahre , S. G. Djorgovski

Robust galaxy cluster mass estimates are fundamental for constraining cosmological parameters from counts. For this reason, it is essential to search for tracers that, independent of the cluster's dynamical state, have a small intrinsic…

宇宙学与河外天体物理 · 物理学 2023-12-19 Lia Doubrawa , Eduardo S. Cypriano , Alexis Finoguenov , Paulo A. A. Lopes , Matteo Maturi , Anthony H. Gonzalez , Renato Dupke

We analyze new measurements of the Mg_2 central line strength index and velocity dispersion (sigma) for the galaxies of the ENEAR survey. The observations are now complete (da Costa et al. 2000) and the sample contains 1223 early-type…

The EGRET results for gamma-ray intensities in and near the Galactic Plane have been analysed in some detail. Attention has been concentrated on energies above 1 GeV and the individual intensities in a $4^\circ$ longitude bin have been…

天体物理学 · 物理学 2009-11-11 A. D. Erlykin , A. W. Wolfendale

We undertook a surface photometry survey of 200 galaxies in the Virgo cluster (complete to B<14.0 mag) carried out in the near-Infrared (NIR) H band. Combining velocity dispersion measurements from the literature with new spectroscopic data…

天体物理学 · 物理学 2009-10-31 G. Gavazzi , A. Boselli , M. Scodeggio , D. Pierini , E. Belsole

We investigate the scatter in the fundamental plane (FP) of early-type galaxies (ETGs) and its dependence on age and internal structure of ETGs, using $16,283$ ETGs with $M_r\le-19.5$ and $0.025\le z<0.055$ in Sloan Digital Sky Survey data.…

星系天体物理 · 物理学 2020-07-22 Yongmin Yoon , Changbom Park

The Fundamental Plane has finite thickness and is tilted from the virial relation, indicating that dynamical mass-to-light ratios (Mdyn/L) vary among early type galaxies. We use a sample of 16,000 quiescent galaxies from the Sloan Digital…

宇宙学与河外天体物理 · 物理学 2015-05-18 Genevieve J. Graves , S. M. Faber

We present photometry and long-slit spectroscopy for 12 S0 and spiral galaxies selected from the Catalogue of Isolated Galaxies. The structural parameters of the sample galaxies are derived from the Sloan Digital Sky Survey i-band images by…

星系天体物理 · 物理学 2016-10-05 L. Morelli , M. Parmiggiani , E. M. Corsini , L. Costantin , E. Dalla Bontà , J. Mèndez-Abreu , A. Pizzella

The fundamental plane of early-type galaxies is a rather tight three-parameter correlation discovered more than twenty years ago. It has resisted a both global and precise physical interpretation despite a consequent number of works,…

宇宙学与河外天体物理 · 物理学 2010-10-15 Didier Fraix-Burnet , Magali Dugué , Tanuka Chattopadhyay , Asis Kumar Chattopadhyay , Emmanuel Davoust