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相关论文: Comparing Dynamical and Stellar Population Mass-to…

200 篇论文

We present a detailed investigation of the cluster stellar mass-to-light (M*/L) ratio and cumulative stellar masses, derived on a galaxy-by-galaxy basis, for 12 massive (M500 ~ 10^14 - 10^15 Msun), nearby clusters with available optical…

星系天体物理 · 物理学 2015-06-23 Yutong Shan , Michael McDonald , Stephane Courteau

We analyze the stellar mass-to-light ratio (M/L) gradients in a large sample of local galaxies taken from the Sloan Digital Sky Survey, spanning a wide range of stellar masses and morphological types. As suggested by the well known…

宇宙学与河外天体物理 · 物理学 2015-05-28 C. Tortora , N. R. Napolitano , A. J. Romanowsky , Ph. Jetzer , V. F. Cardone , M. Capaccioli

I review our understanding of classic dynamical scaling relations, relating luminosity, size and kinematics of early-type galaxies. Using unbiased determinations of galaxy mass profiles from stellar dynamical models, a simple picture has…

星系天体物理 · 物理学 2015-04-14 Michele Cappellari

We show that different stellar-mass estimation methods yield overall mass scales that disagree by factors up to ~2 for the z=0 galaxy population, and more importantly, relative mass scales that sometimes disagree by factors >~3 between…

天体物理学 · 物理学 2009-11-13 Sheila J. Kannappan , Eric Gawiser

From a study of the integrated light properties of 200 globular clusters (GCs) in M31, Strader et al. found that the mass-to-light ratios are lower than what is expected from simple stellar population (SSP) models with a `canonical' stellar…

星系天体物理 · 物理学 2015-06-23 Rosemary L. Shanahan , Mark Gieles

Stellar population synthesis models can now reproduce the photometry of old stellar systems (age $>$ 2 Gyr) in the near-infrared (NIR) bands at 3.4 and 4.6$\mu$m (WISE W1 $\&$ W2 or IRAC 1 $\&$ 2). In this paper we derive stellar…

The stellar masses, mean ages, metallicities, and star formation histories of galaxies are now commonly estimated via stellar population synthesis (SPS) techniques. SPS relies on stellar evolution calculations from the main sequence to…

天体物理学 · 物理学 2009-08-18 Charlie Conroy , James E. Gunn , Martin White

We study the dynamical properties of massive quiescent galaxies at $1.4 < z < 2.1$ using deep Hubble Space Telescope WFC3/F160W imaging and a combination of literature stellar velocity dispersion measurements and new near-infrared spectra…

Low-mass stars (M<0.4Msun) are thought to comprise the bulk of the stellar mass of galaxies but they constitute only of order a percent of the bolometric luminosity of an old stellar population. Directly estimating the number of low-mass…

宇宙学与河外天体物理 · 物理学 2015-05-30 Charlie Conroy , Pieter van Dokkum

We study the mass-to-light ratio of galaxy systems from poor groups to rich clusters, and present for the first time a large database for useful comparisons with theoretical predictions. We extend a previous work, where B_j band…

天体物理学 · 物理学 2009-11-07 M. Girardi , P. Manzato , M. Mezzetti , G. Giuricin , F. Limboz

We present stellar population models to calculate the mass-to-light ratio ($\Upsilon_*$) based on galaxy's colors ranging from $GALEX$ FUV to Spitzer IRAC1 at 3.6$\mu$m. We present a new composite bulge+disk $\Upsilon_*$ model that…

星系天体物理 · 物理学 2022-03-14 James Schombert , Stacy McGaugh , Federico Lelli

Using a sample of 126000 late-type galaxies from the SDSS, we analyzed stellar mass as a function of the dynamical mass. Stellar masses are estimated using eight stellar population synthesis (SPS) models with constant IMF, while dynamical…

We present a measurement of the evolution of the stellar mass function in four redshift bins at 0.4 < z < 1.2 using a sample of more than 5000 K-selected galaxies drawn from the MUNICS dataset. Our data cover the stellar mass range 10^10 <…

天体物理学 · 物理学 2009-09-29 N. Drory , R. Bender , G. Feulner , U. Hopp , C. Maraston , J. Snigula , G. J. Hill

This work aims to study the distribution of luminous and dark matter in Coma early-type galaxies. Dynamical masses obtained under the assumption that mass follows light do not match with the masses of strong gravitational lens systems of…

宇宙学与河外天体物理 · 物理学 2015-05-27 J. Thomas , R. P. Saglia , R. Bender , D. Thomas , K. Gebhardt , J. Magorrian , E. M. Corsini , G. Wegner , S. Seitz

Stellar masses play a crucial role in the exploration of galaxy properties and the evolution of the galaxy population. In this paper, we explore the minimum possible uncertainties in stellar mass-to-light (M/L) ratios from the assumed star…

宇宙学与河外天体物理 · 物理学 2014-11-20 Anna Gallazzi , Eric F. Bell

The fundamental properties of stellar clusters, such as the age or the total initial mass in stars, are often inferred from population synthesis models. The predicted properties are then used to constrain the physical mechanisms involved in…

天体物理学 · 物理学 2013-07-02 M. Cervino , D. Valls-Gabaud

Recent work has suggested that mid-IR wavelengths are optimal for estimating the mass-to-light ratios of stellar populations and hence the stellar masses of galaxies. We compare stellar masses deduced from spectral energy distribution (SED)…

(Abridged) We present mass models of a sample of 14 spiral and 14 S0 galaxies that constrain their stellar and dark matter content. For each galaxy we derive the stellar mass distribution from near-infrared photometry under the assumptions…

星系天体物理 · 物理学 2011-04-07 Michael J. Williams , Martin Bureau , Michele Cappellari

We use spiral galaxy evolution models to argue that there are substantial variations in stellar mass-to-light ratio (M/L) within and among galaxies. Our models show a strong correlation between stellar M/L and galaxy color. We compare the…

天体物理学 · 物理学 2007-05-23 Roelof S. de Jong , Eric F. Bell

We have used a suite of simplified spectrophotometric spiral galaxy evolution models to argue that there are substantial variations in stellar mass-to-light ratios (M/Ls) within and among galaxies, amounting to factors of between 3 and 7 in…

天体物理学 · 物理学 2011-05-05 Eric F. Bell , Roelof S. de Jong