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The observed properties of galaxies vary with inclination; for most applications we would rather have properties that are independent of inclination, intrinsic properties. One way to determine inclination corrections is to consider a large…

天体物理学 · 物理学 2009-06-23 Ariyeh H. Maller , Andreas A. Berlind , Michael R. Blanton , David W. Hogg

Mergers in the local universe present a unique opportunity for studying the transformations of galaxies in detail. Presented here are recent results, based on multi-wavelength, high-resolution imaging and medium resolution spectroscopy,…

宇宙学与河外天体物理 · 物理学 2010-05-12 Barry Rothberg , Jacqueline Fischer

The two major functions in galaxy evolution that we would like to measure are the stellar populations in galaxies, and their time-derivative, the star formation rate. Especially at redshifts above 1, both of these measures are benefiting…

天体物理学 · 物理学 2007-05-23 Matthew Malkan

[Abridged] We present a new approach to investigate the content and spatial distribution of dust in structurally unresolved star-forming galaxies from the observed dependence of integrated spectral properties on galaxy inclination. We…

宇宙学与河外天体物理 · 物理学 2015-06-15 Jacopo Chevallard , Stephane Charlot , Benjamin Wandelt , Vivienne Wild

While galactic bulges may contain no significant dust of their own, the dust within galaxy discs can strongly attenuate the light from their embedded bulges. Furthermore, such dust inhibits the ability of observationally-determined…

天体物理学 · 物理学 2012-04-26 Alister W. Graham , C. C. Worley

We provide measurements of the integrated galaxy light at 70, 160, 250, 350 and 500 micron using deep far-infrared and submillimeter data from space (Spitzer) and balloon platform (BLAST) extragalactic surveys. We use the technique of…

宇宙学与河外天体物理 · 物理学 2010-03-10 Ranga-Ram Chary , Alexandra Pope

We investigate the environmental dependence of star formation and the morphology of galaxies in the local universe based on a volume-limited sample (0.030<z<0.065 and M_r<M_r^*+2) constructed from the data of the Sloan Digital Sky Survey.…

天体物理学 · 物理学 2009-11-10 Masayuki Tanaka , Tomotsugu Goto , Sadanori Okamura , Kazuhiro Shimasaku , Jon Brinkman

We present corrections for the change in the apparent scalelengths, central surface brightnesses and axis ratios due to the presence of dust in pure disk galaxies, as a function of inclination, central face-on opacity in the B-band…

天体物理学 · 物理学 2009-11-11 C. Möllenhoff , C. C. Popescu , R. J. Tuffs

Galaxy metallicity scaling relations provide a powerful tool for understanding galaxy evolution, but obtaining unbiased global galaxy gas-phase oxygen abundances requires proper treatment of the various line-emitting sources within…

星系天体物理 · 物理学 2017-12-13 Ryan L. Sanders , Alice E. Shapley , Kai Zhang , Renbin Yan

Accurate galaxy scaling relations are essential for a successful model of galaxy formation and evolution as they provide direct information about the physical mechanisms of galaxy assembly over cosmic time. We present here a detailed…

星系天体物理 · 物理学 2020-03-19 Bogdan A. Pastrav

We study how the sizes and radial profiles of galaxies vary with wavelength, by fitting Sersic functions simultaneously to imaging in nine optical and near-infrared bands. To quantify the wavelength dependence of effective radius we use the…

[Abridged] Many current and future astronomical surveys will rely on samples of strong gravitational lens systems to draw conclusions about galaxy mass distributions. We use a new strong lensing pipeline (presented in Paper I of this…

天体物理学 · 物理学 2015-05-13 Rachel Mandelbaum , Glenn van de Ven , Charles R. Keeton

Dust attenuation of an inclined galaxy can cause additional asymmetries in observations, even if the galaxy has a perfectly symmetric structure. {Taking advantage of the integral field spectroscopic data observed by the SDSS-IV MaNGA…

星系天体物理 · 物理学 2021-05-05 Fang-Ting Yuan , Jiafeng Lu , Shiyin Shen , Médéric Boquien

We present a new method to classify galaxies from large surveys like the Sloan Digital Sky Survey using inclination-corrected concentration, inclination-corrected location on the color-magnitude diagram, and apparent axis ratio. Explicitly…

天体物理学 · 物理学 2009-11-13 Jeremy Bailin , William E. Harris

The statistical properties of the ellipticities of galaxy images depend on how galaxies form and evolve, and therefore constrain models of galaxy morphology, which are key to the removal of the intrinsic alignment contamination of…

宇宙学与河外天体物理 · 物理学 2013-05-28 B. Joachimi , E. Semboloni , P. E. Bett , J. Hartlap , S. Hilbert , H. Hoekstra , P. Schneider , T. Schrabback

Galaxy shapes are not randomly oriented, rather they are statistically aligned in a way that can depend on formation environment, history and galaxy type. Studying the alignment of galaxies can therefore deliver important information about…

Gravitational lensing has now become a popular tool to measure the mass distribution of structures in the Universe on various scales. Here we focus on the study of galaxy's scale dark matter halos with galaxy-galaxy lensing techniques:…

天体物理学 · 物理学 2007-05-23 M. Limousin , J-P. Kneib , P. Natarajan

We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to generate broad band colours from which ages…

天体物理学 · 物理学 2009-10-31 Eric F. Bell , Richard G. Bower

From the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5), we extract a sample of 4594 galaxies at redshifts 0.02<z<0.03, complete down to a stellar mass of M=10^10 Msol. We quantify their structure (Sersic index), morphology (Sersic…

天体物理学 · 物理学 2009-11-13 Arjen van der Wel

The statistics of Einstein radii for a sample of strong lenses can provide valuable constraints on the underlying mass distribution. The correct interpretation, however, relies critically on the modelling of the selection of the sample,…

宇宙学与河外天体物理 · 物理学 2024-10-30 Qing Zhou , Alessandro Sonnenfeld , Henk Hoekstra
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