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相关论文: Starburst Galaxies: Why the Calzetti Dust Extincti…

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A sample of local galaxies for which far infrared and uv fluxes are available is used to estimate the characteristic dust extinction in galaxies and to test whether standard dust properties are plausible. Assuming galaxies can be…

天体物理学 · 物理学 2009-11-07 Michael Rowan-Robinson

We present and discuss the results of new multiple-scattering radiative transfer calculations for three representative types of galactic environments, filled with either homogeneous or two-phase clumpy dust distributions. Extinction and…

天体物理学 · 物理学 2009-10-05 Adolf N. Witt , Karl D. Gordon

We investigate the origin of the strong radial gradient in the ultraviolet-to-infrared ratio in the spiral galaxy NGC 300, and emphasize the importance of local variations in the interstellar medium geometry, concluding that they cannot be…

天体物理学 · 物理学 2009-11-11 H. Roussel , A. Gil de Paz , M. Seibert , G. Helou , B. F. Madore , C. Martin

We derive the bolometric to X-ray correlation for a local sample of normal and starburst galaxies and use it, in combination with several UV reddening schemes, to predict the 2--8 keV X-ray luminosity for a sample of 24 Lyman-break galaxies…

天体物理学 · 物理学 2009-11-07 Mark Seibert , Timothy M. Heckman , Gerhardt R. Meurer

Dust attenuation strongly affects the observed spectral energy distributions of galaxies, introducing significant uncertainties in the derivation of key physical properties such as star formation rates, stellar masses, and metallicities.…

We investigate the attenuation law seen through an interstellar medium (ISM) with clumpy spatial distributions of stars and dust. The clumpiness of the dust distribution is introduced by a multi-phase ISM model. We solve a set of radiative…

天体物理学 · 物理学 2009-11-10 Akio K. Inoue

We present empirical relations between the global dust reddening and other physical galaxy properties including the Halpha luminosity, Halpha surface brightness, metallicity and axial ratio for star-forming disc galaxies. The study is based…

宇宙学与河外天体物理 · 物理学 2012-03-12 Ting Xiao , Tinggui Wang , Huiyuan Wang , Hongyan Zhou , Honglin Lu , Xiaobo Dong

The aim of the paper is to give a physical explanation of the absence of the feature in the Calzetti extinction curve. We analyze the dust attenuation of a homogeneous source seen through a distant inhomogeneous distant screen. The…

星系天体物理 · 物理学 2015-05-30 Joerg Fischera , Michael Dopita

We derive the mean wavelength dependence of stellar attenuation in a sample of 239 high redshift (1.90 < z < 2.35) galaxies selected via Hubble Space Telescope (HST) WFC3 IR grism observations of their rest-frame optical emission lines. Our…

We study the star formation rate and dust extinction properties of a sample of nearby star forming galaxies as derived from Halpha and UV (2000 A) observations and we compare them to those of a sample of starburst galaxies. The dust…

天体物理学 · 物理学 2016-08-30 V. Buat , A. Boselli , G. Gavazzi , C. Bonfanti

Compared to starburst galaxies, normal star forming galaxies have been shown to display a much larger dispersion of the dust attenuation at fixed reddening through studies of the IRX-beta diagram (the IR/UV ratio "IRX" versus the UV color…

宇宙学与河外天体物理 · 物理学 2014-11-20 M. Boquien , D. Calzetti , R. Kennicutt , D. Dale , C. Engelbracht , K. D. Gordon , S. Hong , J. C. Lee , J. Portouw

We use observed optical to near infrared spectral energy distributions (SEDs) of 266 galaxies in the COSMOS survey to derive the wavelength dependence of the dust attenuation at high redshift. All of the galaxies have spectroscopic…

星系天体物理 · 物理学 2015-06-23 Nick Scoville , Andreas Faisst , Peter Capak , Yuko Kakazu , Gongjie Li , Charles Steinhardt

We derive apparent and absolute ultraviolet (UV) magnitudes, and luminosities in the infrared (IR) range of a large sample of low-redshift (0<z<1) compact star-forming galaxies (CSFGs) selected from the Data Release 12 of the Sloan Digital…

星系天体物理 · 物理学 2023-05-03 Y. I. Izotov , N. G. Guseva , K. J. Fricke , C. Henkel , D. Schaerer

We study the behavior of dust in galaxies at cosmic dawn, z=6-8, by coupling the FirstLight simulations with the radiative transfer code POLARIS. The starburst nature of these galaxies and their complex distribution of dust lead to a large…

(Abridged) The effective extinction law (attenuation behavior) in galaxies in the emitted ultraviolet is well known only for actively star-forming objects and combines effects of the grain properties, fine structure in the dust…

星系天体物理 · 物理学 2015-06-18 William C. Keel , Anna M. Manning , Benne W. Holwerda , Chris J. Lintott , Kevin Schawinski

The nature of Galactic interstellar extinction is tested using reddening line parameters for several fields in conjunction with equivalent widths $W(\lambda4430)$ for the diffuse interstellar band at $4430$ \AA. The Cardelli et…

星系天体物理 · 物理学 2015-06-22 David G. Turner , Daniel J. Majaess , David D. Balam

This letter utilizes composite spectral energy distributions (SEDs) constructed from NEWFIRM Medium-Band Survey photometry to constrain the dust attenuation curve in 0.5<z<2.0 galaxies. Based on similarities between the full SED shapes…

宇宙学与河外天体物理 · 物理学 2015-06-16 Mariska Kriek , Charlie Conroy

Do spatial distributions of dust grains in galaxies have typical forms, as do spatial distributions of stars? We investigate whether or not the distributions resemble uniform foreground screens, as commonly assumed by the high-redshift…

Context. Observations of quasars shining through foreground galaxies, offer a way to probe the dust extinction curves of distant galaxies. Interesting objects for this study are found in strong gravitational lensing systems, where the…

天体物理学 · 物理学 2009-11-13 Linda Ostman , Ariel Goobar , Edvard Mortsell

The effective extinction law for supernovae surrounded by circumstellar dust is examined by Monte-Carlo simulations. Grains with light scattering properties as for interstellar dust in the Milky-Way (MW) or the Large Magellanic Clouds…

天体物理学 · 物理学 2014-11-18 Ariel Goobar
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