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We present an analysis of 436 lines of sight with extinction data covering wavelength range from near-infrared (NIR) to ultraviolet (UV). We use J, H, K photometry from 2MASS database, the IR intrinsic colors from Wegner (1994), and UV…

Astrophysics · Physics 2007-05-23 Anna Geminale , Piotr Popowski

We have assembled a homogeneous database of 417 ultraviolet (UV) extinction curves for reddened sightlines having International Ultraviolet Explorer (IUE) spectra. We have combined these with optical and 2MASS photometry allowing estimates…

Astrophysics · Physics 2009-11-10 Lynne A. Valencic , Geoffrey C. Clayton , Karl D. Gordon

The extinction law from ultraviolet (UV) to infrared (IR) (0.2-24 $\mu$m) is determined by relying on the blue-edge method and color excess ratios for some nearby molecular clouds, from low mass star forming region to massive star forming…

Astrophysics of Galaxies · Physics 2024-10-04 Zhetai Cao , Biwei Jiang , Shu Wang , Jun Li

I consider whether we can significantly improve the Cardelli et al. (1989) family of extinction laws using new data and techniques. There are six different aspects that need to be treated: The use of monochromatic quantities, the three…

Astrophysics of Galaxies · Physics 2012-09-13 J. Maíz Apellániz

The large majority of extinction sight lines in our Galaxy obey a simple relation depending on one parameter, the total-to-selective extinction coefficient, Rv. Different values of Rv are able to match the whole extinction curve through…

Astrophysics of Galaxies · Physics 2015-05-20 Paola Mazzei , Guido Barbaro

This paper addresses the issue of how best to correct astronomical data for the wavelength-dependent effects of Galactic interstellar extinction. The main general features of extinction from the IR through the UV are reviewed, along with…

Astrophysics · Physics 2009-10-31 Edward L. Fitzpatrick

We present a spectroscopic study of the shape of the dust-extinction law between 1.0 and 2.2um towards a set of nine ultracompact HII regions with Av > 15 mag. We find some evidence that the reddening curve may tend to flatten at higher…

Astrophysics · Physics 2009-11-10 T. J. T. Moore , S. L. Lumsden , N. A. Ridge , P. J. Puxley

We present extinction curves that include data down to far ultraviolet wavelengths (FUV; 1050 - 1200 A) for nine Galactic sight lines. The FUV extinction was measured using data from the Far Ultraviolet Spectroscopic Explorer. The sight…

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…

Astrophysics · Physics 2014-11-18 Ariel Goobar

Understanding the effects of dust extinction is important to properly interpret observations. The optical total-to-selective extinction ratio, Rv = Av/E(B-V), is widely used to describe extinction variations in ultraviolet and optical…

Astrophysics of Galaxies · Physics 2017-11-01 Shu Wang , Biwei Jiang , He Zhao , Xiaodian Chen , Richard de Grijs

Context. The properties of dust grains, in particular their size distribution, are expected to differ from the interstellar medium to the high-density regions within molecular clouds. Since the extinction at near-infrared wavelengths is…

Astrophysics of Galaxies · Physics 2015-06-04 Joana Ascenso , Marco Lombardi , Charles J. Lada , João Alves

It is well known that the extinction properties along lines of sight to Type Ia supernovae are described by steep extinction curves with unusually low total-to-selective extinction ratios of Rv = 1.0-2.0. In order to reveal the properties…

Astrophysics of Galaxies · Physics 2016-12-07 Takaya Nozawa

We present an exhaustive, quantitative comparison of all of the known extinction curves in the Small and Large Magellanic Clouds (SMC and LMC) with our understanding of the general behavior of Milky Way extinction curves. The R_V dependent…

A precise extinction law is a critical input when interpreting observations of highly reddened sources such as young star clusters and the Galactic Center (GC). We use Hubble Space Telescope observations of a region of moderate extinction…

Astrophysics of Galaxies · Physics 2018-03-14 M. W. Hosek , J. R. Lu , J. Anderson , T. Do , E. F. Schlafly , A. M. Ghez , W. I. Clarkson , M. R. Morris , S. M. Albers

This study establishes that SMC, LMC and Milky Way extinction curves obey the same extinction law which depends on the 2200A bump size and one parameter, and generalizes the Cardelli, Clayton and Mathis (1989) relationship. This suggests…

Astrophysics · Physics 2009-06-23 Frederic Zagury

Investigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM). In this study, we utilize…

Astrophysics of Galaxies · Physics 2024-06-06 Jun Li , Bingqiu Chen , Biwei Jiang , Jian Gao , Xi Chen

We analyze the multi-wavelength photometric and spectroscopic data of 12 ultraluminous infrared galaxies (ULIRGs) at z ~ 1 and compare them with models of stars and dust in order to study the extinction law and star formation in young…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 T. Shimizu , K. Kawara , H. Sameshima , N. Ienaka , T. Nozawa , T. Kozasa

We present our progress on the study of extinction laws along three diferent lines. [a] We compare how well different families of extinction laws fit existing photometric data for Galactic sightlines and we find that the Ma\'iz Apell\'aniz…

Astrophysics of Galaxies · Physics 2016-10-05 J. Maíz Apellániz , E. Trigueros Páez , A. Bostroem , R. H. Barbá , C. J. Evans

We combine new HST/ACS observations and existing data to investigate the wavelength dependence of NIR extinction. Previous studies suggest a power-law form, with a "universal" value of the exponent, although some recent observations…

Astrophysics of Galaxies · Physics 2009-07-22 Edward L. Fitzpatrick , Derck Massa

We produce a set of 72 NIR through UV extinction curves by combining new HST/STIS optical spectrophotometry with existing IUE spectrophotometry (yielding gapless coverage from 1150 to 10000 Angstroms) and NIR photometry. These curves are…

Astrophysics of Galaxies · Physics 2020-01-08 Edward L. Fitzpatrick , Derck Massa , Karl D. Gordon , Ralph Bohlin , Geoffrey C. Clayton
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