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相关论文: Stellar Mass-to-light Ratios: Composite Bulge+Disk…

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We combine new data from the main sequence (M_* versus SFR) of star-forming galaxies and galaxy colors (from GALEX to Spitzer) with a flexible stellar population scheme to deduce the mass-to-light ratio (\Upsilon_*) of star-forming galaxies…

星系天体物理 · 物理学 2018-12-12 J. Schombert , S. McGaugh , F. Lelli

We present new color-$\Upsilon_*$ (mass-to-light) models to convert WISE W1 fluxes into stellar masses. We outline a range of possible star formation histories and chemical evolution scenarios to explore the confidence limits of stellar…

星系天体物理 · 物理学 2025-01-22 Francis Duey , James Schombert , Stacy McGaugh , Federico Lelli

We combine Spitzer $3.6\mu$ observations of a sample of disk galaxies spanning over 10 magnitudes in luminosity with optical luminosities and colors to test population synthesis prescriptions for computing stellar mass. Many commonly…

星系天体物理 · 物理学 2015-03-27 Stacy McGaugh , Jim Schombert

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 present new Spitzer 3.6 micron observations of a sample of disk galaxies spanning over 10 magnitudes in luminosity and ranging in gas fraction from ~10% to over 90%. We use these data to test population synthesis prescriptions for…

宇宙学与河外天体物理 · 物理学 2014-02-20 Stacy McGaugh , Jim Schombert

We estimate the stellar masses of disk galaxies with two independent methods: a photometrically self-consistent color$-$mass-to-light ratio relation (CMLR) from population synthesis models, and the Baryonic Tully-Fisher relation (BTFR)…

星系天体物理 · 物理学 2015-03-27 Stacy McGaugh , Jim Schombert

In this paper we investigate the statistical properties of the Baryonic Tully-Fisher relation (BTFr) for a sample of 32 galaxies with accurate distances based on Cepheids and/or TRGB stars. We make use of homogeneously analysed photometry…

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

We investigate colors and mass-to-light ratios ($M/L$s) of the bulges and disks for 28 nearby spiral galaxies with various morphological types of Sab to Scd, using images in optical and near-infrared ($V$, $I$, and $J$) bands and published…

天体物理学 · 物理学 2015-05-13 Akira Yoshino , Takashi Ichikawa

A low mass-to-light ratio for the stellar component of spiral galaxies (M/L<1 in the I-band) is advocated by various dynamical arguments and by recent cosmological simulations of the formation of these systems. We discuss this possibility…

天体物理学 · 物理学 2009-11-07 L. Portinari , J. Sommer-Larsen , R. Tantalo

We extend our initial study of the connection between the UV colour of galaxies and both the inferred stellar mass-to-light ratio, $\Upsilon_*$, and a mass-to-light ratio referenced to Salpeter initial mass function (IMF) models of the same…

星系天体物理 · 物理学 2015-06-23 Dennis Zaritsky , Armando Gil de Paz , Alexandre Y. K. Bouquin

I investigate the Baryonic Tully-Fisher relation for a sample of galaxies with extended 21 cm rotation curves spanning the range 20 < Vf < 300 km/s. A variety of scalings of the stellar mass-to-light ratio are considered. For each…

天体物理学 · 物理学 2010-04-06 Stacy S. McGaugh

Evolutionary synthesis models for stellar populations of various ages and chemical compositions are constructed with the approach described in Maraston (1998), in which the Fuel Consumption Theorem is used to evaluate the energetics of Post…

天体物理学 · 物理学 2007-05-23 Claudia Maraston

We present a new approach for estimating the 3.6 micron stellar mass-to-light ratio in terms of the [3.6]-[4.5] colors of old stellar populations. Our approach avoids several of the largest sources of uncertainty in existing techniques. By…

Maximum disc decompositions of rotation curves place a dynamical upper limit to the mass attributable to stars in galaxies. The precise definition of this term, however, can be vague and varies in usage. We develop an algorithm to robustly…

星系天体物理 · 物理学 2018-07-31 Nathaniel Starkman , Stacy McGaugh , Federico Lelli , James Schombert

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

Cosmological simulations of disc galaxy formation, when compared to the observed Tully-Fisher relation, suggest a low Mass-to-Light (M/L) ratio for the stellar component in spirals. We show that a number of "bottom-light" Initial Mass…

天体物理学 · 物理学 2007-05-23 L. Portinari , J. Sommer-Larsen , R. Tantalo

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 use detailed modeling of stellar populations of nearby galaxies to calculate population parameters. Our sample of galaxies includes most galaxies of the Local Group and several more distant giant galaxies. Available data are sufficient…

天体物理学 · 物理学 2007-05-23 J. Einasto , P. Tenjes

A low mass-to-light ratio for the baryonic component of spiral galaxies is advocated by a number of dynamical studies and by cosmological simulations of galaxy formation. We discuss the possibility of obtaining low mass-to-light ratios for…

天体物理学 · 物理学 2009-11-07 L. Portinari , J. Sommer-Larsen , R. Tantalo
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